238 Security Protocols jobs in London
Network Security Engineer (Protocol & Architecture)
London, London
Gen
Posted 2 days ago
Job Viewed
Job Description
Social network you want to login/join with:nNetwork Security Engineer (Protocol & Architecture), London
col-narrow-leftnClient:
GennLocation:
London, United KingdomnJob Category:
Othern-nEU work permit required:
Yesncol-narrow-rightnJob Reference:
1d3c6f27b2c4nJob Views:
5nPosted:
nExpiry Date:
ncol-widenJob Description:
Job DescriptionnWho Are We?nWe’re not just a company; we’re a global force—fiercely committed to ensuring that everyone, everywhere, can live digitally safe. Our family of brands—Norton, Avast, LifeLock, Avira, AVG, ReputationDefender, and CCleaner—unites the brightest minds, sharp tech, and diverse thinking to protect over 500 million people.nWe’ve built an inclusive workplace where your well-being is a priority, because true success comes from balance and authenticity. When you’re thriving, you’re unstoppable. Bring us your bold ideas and relentless passion.nThe digital world isn’t a distant future—it’s our present. If you’re ready to push boundaries and be part of something bigger, join #TeamGen .nMission and Goals:nWe’re looking for a VPN Tech Lead to drive the evolution of our VPN technology—the engine behind Norton Secure VPN and Avast SecureLine VPN. You’ll lead innovation, performance improvements, and protocol development across both client and infrastructure layers.nOur team operates at the core of internet privacy, owning protocols such as WireGuard and Mimic (our in-house solution). Your mission: push the boundaries of VPN performance, reliability, and obfuscation—and ensure our tech meets the needs of hundreds of millions of users in a complex, high-scale environment.nThis role can focus purely on technical leadership (architecture, coding, mentoring) or evolve to include organizational/team leadership—depending on your skills and ambitions.nObjectives (What You Will Do in This Role):nDesign, implement, and evolve VPN protocols and supporting systems—including WireGuard, Mimic, and related infrastructure.nOptimize performance, reliability, and scalability across client platforms (mobile/desktop) and backend VPN servers.nCollaborate with infrastructure, client, and product teams to align protocol improvements with real-world user needs.nLead deep technical investigations into bottlenecks, protocol anomalies, and production traffic issues.nMentor engineers, champion best practices, and set technical direction for the VPN stack.nDrive obfuscation techniques and anti-censorship strategies in network-challenging environments.nCompetencies (What You’ll Need to Be Successful in This Role):nStrong working knowledge of network protocols, TCP/IP, and VPN technologies (especially WireGuard, OpenVPN, or proprietary protocols).nExperience building and debugging high-performance, secure systems.nAbility to drive technical projects across both client and infrastructure layers.nEffective communication skills and a collaborative mindset.nNice to Have:nExperience with custom protocol design, obfuscation, or traffic-shaping techniques.nBackground in mobile or desktop VPN client development.nExperience with containerized deployments (Docker, Kubernetes).nFamiliarity with infrastructure automation or configuration management (e.g., Terraform, Puppet).nContributions to open-source security or networking projects.nWhat We Can Offer:nUnlimited PTO and flexible working hours.nThe chance to join a major global tech company in the S&P 500.nOpportunities to learn from and work with leaders in Digital Security.nCafeteria points via Benefit Plus (meal plan, pension insurance, travel, leisure activities, Multisport card, and more).nTuition reimbursement for job-related courses.nA personal Learning & Development plan.nJob DescriptionnWho Are We?nWe’re not just a company; we’re a global force—fiercely committed to ensuring that everyone, everywhere, can live digitally safe. Our family of brands—Norton, Avast, LifeLock, Avira, AVG, ReputationDefender, and CCleaner—unites the brightest minds, sharp tech, and diverse thinking to protect over 500 million people.nWe’ve built an inclusive workplace where your well-being is a priority, because true success comes from balance and authenticity. When you’re thriving, you’re unstoppable. Bring us your bold ideas and relentless passion.nThe digital world isn’t a distant future—it’s our present. If you’re ready to push boundaries and be part of something bigger, join #TeamGen .nMission and Goals:nWe’re looking for a VPN Tech Lead to drive the evolution of our VPN technology—the engine behind Norton Secure VPN and Avast SecureLine VPN. You’ll lead innovation, performance improvements, and protocol development across both client and infrastructure layers.nOur team operates at the core of internet privacy, owning protocols such as WireGuard and Mimic (our in-house solution). Your mission: push the boundaries of VPN performance, reliability, and obfuscation—and ensure our tech meets the needs of hundreds of millions of users in a complex, high-scale environment.nThis role can focus purely on technical leadership (architecture, coding, mentoring) or evolve to include organizational/team leadership—depending on your skills and ambitions.nObjectives (What You Will Do in This Role):nDesign, implement, and evolve VPN protocols and supporting systems—including WireGuard, Mimic, and related infrastructure.
Optimize performance, reliability, and scalability across client platforms (mobile/desktop) and backend VPN servers.
Collaborate with infrastructure, client, and product teams to align protocol improvements with real-world user needs.
Lead deep technical investigations into bottlenecks, protocol anomalies, and production traffic issues.
Mentor engineers, champion best practices, and set technical direction for the VPN stack.
Drive obfuscation techniques and anti-censorship strategies in network-challenging environments.
Competencies (What You’ll Need to Be Successful in This Role):nStrong working knowledge of network protocols, TCP/IP, and VPN technologies (especially WireGuard, OpenVPN, or proprietary protocols).
Experience building and debugging high-performance, secure systems.
Ability to drive technical projects across both client and infrastructure layers.
Effective communication skills and a collaborative mindset.
Nice to Have:nExperience with custom protocol design, obfuscation, or traffic-shaping techniques.
Background in mobile or desktop VPN client development.
Experience with containerized deployments (Docker, Kubernetes).
Familiarity with infrastructure automation or configuration management (e.g., Terraform, Puppet).
Contributions to open-source security or networking projects.
What We Can Offer:nAnnual bonus program.
Unlimited PTO and flexible working hours.
The chance to join a major global tech company in the S&P 500.
Opportunities to learn from and work with leaders in Digital Security.
Cafeteria points via Benefit Plus (meal plan, pension insurance, travel, leisure activities, Multisport card, and more).
Tuition reimbursement for job-related courses.
A personal Learning & Development plan.
A sustainable home-improvement bonus.
Gen is proud to be an equal-opportunity employer, committed to diversity and inclusivity. We base employment decisions on merit, experience, and business needs, without considering race, color, national origin, age, religion, sex, pregnancy, genetic information, disability, medical condition, marital status, sexual orientation, gender identity or expression, military or veteran status, or other unlawful factors. Gen prohibits discrimination based on these protected characteristics and recruits talented candidates from diverse backgrounds.We consider individuals with arrest and conviction records and do not discriminate against employees for discussing their own pay or that of other employees or applicants. Learn more about pay transparency.To conform to U.S. export control regulations, applicant should be eligible for any required authorizations from the U.S. Government.
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col-narrow-leftnClient:
GennLocation:
London, United KingdomnJob Category:
Othern-nEU work permit required:
Yesncol-narrow-rightnJob Reference:
1d3c6f27b2c4nJob Views:
5nPosted:
nExpiry Date:
ncol-widenJob Description:
Job DescriptionnWho Are We?nWe’re not just a company; we’re a global force—fiercely committed to ensuring that everyone, everywhere, can live digitally safe. Our family of brands—Norton, Avast, LifeLock, Avira, AVG, ReputationDefender, and CCleaner—unites the brightest minds, sharp tech, and diverse thinking to protect over 500 million people.nWe’ve built an inclusive workplace where your well-being is a priority, because true success comes from balance and authenticity. When you’re thriving, you’re unstoppable. Bring us your bold ideas and relentless passion.nThe digital world isn’t a distant future—it’s our present. If you’re ready to push boundaries and be part of something bigger, join #TeamGen .nMission and Goals:nWe’re looking for a VPN Tech Lead to drive the evolution of our VPN technology—the engine behind Norton Secure VPN and Avast SecureLine VPN. You’ll lead innovation, performance improvements, and protocol development across both client and infrastructure layers.nOur team operates at the core of internet privacy, owning protocols such as WireGuard and Mimic (our in-house solution). Your mission: push the boundaries of VPN performance, reliability, and obfuscation—and ensure our tech meets the needs of hundreds of millions of users in a complex, high-scale environment.nThis role can focus purely on technical leadership (architecture, coding, mentoring) or evolve to include organizational/team leadership—depending on your skills and ambitions.nObjectives (What You Will Do in This Role):nDesign, implement, and evolve VPN protocols and supporting systems—including WireGuard, Mimic, and related infrastructure.nOptimize performance, reliability, and scalability across client platforms (mobile/desktop) and backend VPN servers.nCollaborate with infrastructure, client, and product teams to align protocol improvements with real-world user needs.nLead deep technical investigations into bottlenecks, protocol anomalies, and production traffic issues.nMentor engineers, champion best practices, and set technical direction for the VPN stack.nDrive obfuscation techniques and anti-censorship strategies in network-challenging environments.nCompetencies (What You’ll Need to Be Successful in This Role):nStrong working knowledge of network protocols, TCP/IP, and VPN technologies (especially WireGuard, OpenVPN, or proprietary protocols).nExperience building and debugging high-performance, secure systems.nAbility to drive technical projects across both client and infrastructure layers.nEffective communication skills and a collaborative mindset.nNice to Have:nExperience with custom protocol design, obfuscation, or traffic-shaping techniques.nBackground in mobile or desktop VPN client development.nExperience with containerized deployments (Docker, Kubernetes).nFamiliarity with infrastructure automation or configuration management (e.g., Terraform, Puppet).nContributions to open-source security or networking projects.nWhat We Can Offer:nUnlimited PTO and flexible working hours.nThe chance to join a major global tech company in the S&P 500.nOpportunities to learn from and work with leaders in Digital Security.nCafeteria points via Benefit Plus (meal plan, pension insurance, travel, leisure activities, Multisport card, and more).nTuition reimbursement for job-related courses.nA personal Learning & Development plan.nJob DescriptionnWho Are We?nWe’re not just a company; we’re a global force—fiercely committed to ensuring that everyone, everywhere, can live digitally safe. Our family of brands—Norton, Avast, LifeLock, Avira, AVG, ReputationDefender, and CCleaner—unites the brightest minds, sharp tech, and diverse thinking to protect over 500 million people.nWe’ve built an inclusive workplace where your well-being is a priority, because true success comes from balance and authenticity. When you’re thriving, you’re unstoppable. Bring us your bold ideas and relentless passion.nThe digital world isn’t a distant future—it’s our present. If you’re ready to push boundaries and be part of something bigger, join #TeamGen .nMission and Goals:nWe’re looking for a VPN Tech Lead to drive the evolution of our VPN technology—the engine behind Norton Secure VPN and Avast SecureLine VPN. You’ll lead innovation, performance improvements, and protocol development across both client and infrastructure layers.nOur team operates at the core of internet privacy, owning protocols such as WireGuard and Mimic (our in-house solution). Your mission: push the boundaries of VPN performance, reliability, and obfuscation—and ensure our tech meets the needs of hundreds of millions of users in a complex, high-scale environment.nThis role can focus purely on technical leadership (architecture, coding, mentoring) or evolve to include organizational/team leadership—depending on your skills and ambitions.nObjectives (What You Will Do in This Role):nDesign, implement, and evolve VPN protocols and supporting systems—including WireGuard, Mimic, and related infrastructure.
Optimize performance, reliability, and scalability across client platforms (mobile/desktop) and backend VPN servers.
Collaborate with infrastructure, client, and product teams to align protocol improvements with real-world user needs.
Lead deep technical investigations into bottlenecks, protocol anomalies, and production traffic issues.
Mentor engineers, champion best practices, and set technical direction for the VPN stack.
Drive obfuscation techniques and anti-censorship strategies in network-challenging environments.
Competencies (What You’ll Need to Be Successful in This Role):nStrong working knowledge of network protocols, TCP/IP, and VPN technologies (especially WireGuard, OpenVPN, or proprietary protocols).
Experience building and debugging high-performance, secure systems.
Ability to drive technical projects across both client and infrastructure layers.
Effective communication skills and a collaborative mindset.
Nice to Have:nExperience with custom protocol design, obfuscation, or traffic-shaping techniques.
Background in mobile or desktop VPN client development.
Experience with containerized deployments (Docker, Kubernetes).
Familiarity with infrastructure automation or configuration management (e.g., Terraform, Puppet).
Contributions to open-source security or networking projects.
What We Can Offer:nAnnual bonus program.
Unlimited PTO and flexible working hours.
The chance to join a major global tech company in the S&P 500.
Opportunities to learn from and work with leaders in Digital Security.
Cafeteria points via Benefit Plus (meal plan, pension insurance, travel, leisure activities, Multisport card, and more).
Tuition reimbursement for job-related courses.
A personal Learning & Development plan.
A sustainable home-improvement bonus.
Gen is proud to be an equal-opportunity employer, committed to diversity and inclusivity. We base employment decisions on merit, experience, and business needs, without considering race, color, national origin, age, religion, sex, pregnancy, genetic information, disability, medical condition, marital status, sexual orientation, gender identity or expression, military or veteran status, or other unlawful factors. Gen prohibits discrimination based on these protected characteristics and recruits talented candidates from diverse backgrounds.We consider individuals with arrest and conviction records and do not discriminate against employees for discussing their own pay or that of other employees or applicants. Learn more about pay transparency.To conform to U.S. export control regulations, applicant should be eligible for any required authorizations from the U.S. Government.
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0
Network Security Engineer
London, London
Meta
Posted 2 days ago
Job Viewed
Job Description
Overview
Summary:
Meta's Network Security team is seeking an experienced engineer to help secure our global Data Centers, network Backbone, Optical Infrastructure, and Edge PoPs. We do this by working extensively across the Meta family of products, including Instagram, WhatsApp, and AI where we identify and solve security problems across network infrastructure. You will be responsible for building, implementing, and operationally supporting the organization to develop security controls and services that will protect network infrastructure which helps serve traffic for over 3 billion users worldwide. We are looking for engineers with experience in managing complex issues that require problem-solving to drive security and innovation, who will research and develop new solutions to help protect our infrastructure and our users through a defense in-depth approach. The team thrives in finding security issues and eradicating them and makes life hard for bad actors. With focuses that range from large scale Distributed Denial of Service (DDoS), routing security, security tool development, defense against internal and external attacks there’s lots of room to push your skill set in deploying network security controls at scale.nResponsibilities
Identifying risks across network infrastructure that would lead to the exposure of sensitive data, unauthorized access, or loss of availability and prioritizing remediation efforts to address gaps
Influence security direction of the network, including management software and infrastructure to protect the network integrity of Meta platforms
Conceptualize and lead efforts towards building sustainable and scalable network layer security controls and tooling
Mentor and champion security practices through cross functional work with engineering teams throughout Meta
Keep Meta's safe through active operation and defense of critical network infrastructure
Minimum Qualifications
Engineering degree, or a related technical discipline, or equivalent work experience
Experience coding in higher-level languages (e.g. Python, Rust, Go, C++)
Experience in configuration and maintenance of network platforms such as firewalls, routers, switches, load balancers, and proxies
Experience learning software, frameworks and APIs
Preferred Qualifications
Understanding of implementation and scaling of access controls across both host and network layers.
Understanding of threat models to better protect against attacks or detect new vectors.
Experience leading network efforts to investigate, prevent, and mitigate security incidents.
Experience evaluating and testing new vendor platforms and in house network initiatives for security issues.
Experience leveraging layered security models to defend critical network infrastructure.
Industry:
Internet
#J-18808-Ljbffrn
Summary:
Meta's Network Security team is seeking an experienced engineer to help secure our global Data Centers, network Backbone, Optical Infrastructure, and Edge PoPs. We do this by working extensively across the Meta family of products, including Instagram, WhatsApp, and AI where we identify and solve security problems across network infrastructure. You will be responsible for building, implementing, and operationally supporting the organization to develop security controls and services that will protect network infrastructure which helps serve traffic for over 3 billion users worldwide. We are looking for engineers with experience in managing complex issues that require problem-solving to drive security and innovation, who will research and develop new solutions to help protect our infrastructure and our users through a defense in-depth approach. The team thrives in finding security issues and eradicating them and makes life hard for bad actors. With focuses that range from large scale Distributed Denial of Service (DDoS), routing security, security tool development, defense against internal and external attacks there’s lots of room to push your skill set in deploying network security controls at scale.nResponsibilities
Identifying risks across network infrastructure that would lead to the exposure of sensitive data, unauthorized access, or loss of availability and prioritizing remediation efforts to address gaps
Influence security direction of the network, including management software and infrastructure to protect the network integrity of Meta platforms
Conceptualize and lead efforts towards building sustainable and scalable network layer security controls and tooling
Mentor and champion security practices through cross functional work with engineering teams throughout Meta
Keep Meta's safe through active operation and defense of critical network infrastructure
Minimum Qualifications
Engineering degree, or a related technical discipline, or equivalent work experience
Experience coding in higher-level languages (e.g. Python, Rust, Go, C++)
Experience in configuration and maintenance of network platforms such as firewalls, routers, switches, load balancers, and proxies
Experience learning software, frameworks and APIs
Preferred Qualifications
Understanding of implementation and scaling of access controls across both host and network layers.
Understanding of threat models to better protect against attacks or detect new vectors.
Experience leading network efforts to investigate, prevent, and mitigate security incidents.
Experience evaluating and testing new vendor platforms and in house network initiatives for security issues.
Experience leveraging layered security models to defend critical network infrastructure.
Industry:
Internet
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This advertiser has chosen not to accept applicants from your region.
1
Senior Network Security Engineer
EC2N 2BY London, London
£75000 Annually
WhatJobs
Posted 1 day ago
Job Viewed
Job Description
Our client is seeking a highly experienced Senior Network Security Engineer to join their established IT infrastructure team. This is a permanent, office-based position located in the heart of London, England, UK . The successful candidate will be responsible for designing, implementing, and maintaining robust network security solutions to protect the company's assets and data. You will play a critical role in safeguarding our network against evolving cyber threats, ensuring the integrity, confidentiality, and availability of our systems. This role requires a deep understanding of network protocols, security best practices, and a proactive approach to threat detection and prevention.
Key Responsibilities:
Key Responsibilities:
- Design, implement, and manage firewall infrastructure, Intrusion Detection/Prevention Systems (IDS/IPS), VPNs, and other security appliances.
- Monitor network traffic for security breaches and suspicious activities, responding promptly to incidents.
- Conduct regular security assessments, vulnerability scans, and penetration testing to identify and mitigate risks.
- Develop and enforce network security policies, standards, and procedures.
- Manage security incident response activities, including investigation, containment, and recovery.
- Ensure compliance with relevant security regulations and industry best practices.
- Collaborate with IT teams to integrate security measures into network design and deployment.
- Provide technical expertise and guidance on network security matters.
- Stay up-to-date with the latest security threats, trends, and technologies.
- Document network security configurations, policies, and procedures.
- Bachelor's degree in Computer Science, Information Security, or a related field, or equivalent practical experience.
- Minimum of 5 years of experience in network security engineering.
- Proven expertise with various security technologies such as firewalls (Palo Alto, Cisco ASA, Fortinet), IDS/IPS, SIEM solutions (Splunk, QRadar), and VPNs.
- Strong understanding of TCP/IP, routing protocols, and network architecture.
- Experience with cloud security principles (AWS, Azure, GCP) is a plus.
- Relevant security certifications such as CISSP, CCNA Security, or CCNP Security are highly desirable.
- Excellent analytical, problem-solving, and troubleshooting skills.
- Strong communication and interpersonal skills, with the ability to explain complex technical issues to non-technical audiences.
This advertiser has chosen not to accept applicants from your region.
2
Senior Network Security Engineer
SW1A 0AA London, London
£70000 Annually
WhatJobs
Posted 1 day ago
Job Viewed
Job Description
Our client, a major telecommunications provider, is seeking a highly skilled and experienced Senior Network Security Engineer to join their critical infrastructure team in London, England, UK . This role is essential for safeguarding the integrity, confidentiality, and availability of their extensive network infrastructure. You will be responsible for designing, implementing, and managing robust security solutions, monitoring for threats, and responding to security incidents. This is a hands-on, on-site position that requires a deep understanding of network protocols, security technologies, and threat landscapes.
Key Responsibilities:
Key Responsibilities:
- Design, implement, and maintain network security infrastructure, including firewalls, intrusion detection/prevention systems (IDS/IPS), VPNs, and endpoint security solutions.
- Develop and enforce security policies, standards, and procedures across the network.
- Conduct regular security assessments, vulnerability scans, and penetration testing to identify and mitigate risks.
- Monitor network traffic for security breaches and anomalous activity, responding promptly and effectively to incidents.
- Develop and maintain incident response plans and conduct post-incident analysis.
- Collaborate with IT operations and other teams to ensure security is integrated into all network design and deployment activities.
- Evaluate and recommend new security technologies and solutions to enhance the overall security posture.
- Provide technical leadership and mentorship to junior security engineers.
- Stay current with emerging threats, vulnerabilities, and security best practices in the telecommunications industry.
- Develop and deliver security awareness training to relevant personnel.
- Ensure compliance with industry regulations and data protection laws.
- Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field.
- Extensive experience in network security engineering, with a focus on telecommunications networks.
- In-depth knowledge of network protocols (TCP/IP, BGP, OSPF), firewall technologies, VPNs, and IDS/IPS.
- Experience with security information and event management (SIEM) systems.
- Proficiency in scripting languages (e.g., Python, Bash) for automation is highly desirable.
- Relevant certifications such as CISSP, CCIE Security, or GIAC are a strong advantage.
- Strong analytical and problem-solving skills, with the ability to diagnose and resolve complex security issues.
- Excellent communication and interpersonal skills, with the ability to explain technical concepts to non-technical stakeholders.
- Ability to work effectively under pressure and manage critical security incidents.
- Experience in a Security Operations Center (SOC) environment is a plus.
This advertiser has chosen not to accept applicants from your region.
3
Network Security Engineer - London
London, London
OpenAI
Posted 2 days ago
Job Viewed
Job Description
Overview
OpenAI’s Platform and Infrastructure Engineering organization advances the mission of deploying artificial general intelligence (AGI) for the benefit of all by delivering secure, scalable, and resilient technology solutions. Our team builds and maintains robust infrastructure that safeguards OpenAI’s data and systems while ensuring employees are well-equipped and seamlessly connected. By prioritizing security, reliability, and user-centric solutions, we empower OpenAI employees to drive impactful AI research, corporate operations, and product innovation.nAbout the RolenAs a
Network Security Engineer
at OpenAI, you will play a critical role in architecting and maintaining both campus and cloud network infrastructure. You will design and implement secure, scalable, and high-performing network solutions that bridge on-premises environments with public cloud environments. Your expertise in routing and switching will ensure optimal network performance and reliability across diverse environments. You will drive automation initiatives through Infrastructure-as-Code (IaC) and GitOps methodologies, streamlining network provisioning, enforcing configuration consistency, and optimizing corporate technology workflows. Your responsibilities will also include developing CI/CD pipelines tailored for corporate infrastructure, enhancing deployment efficiency, and integrating robust network security measures. You will establish comprehensive observability and proactive issue resolution strategies.nWe are seeking individuals passionate about network automation, security, and scalable IT solutions that enhance both campus and cloud network operations. You should possess extensive experience with enterprise network technologies, alongside a strong foundation in network security fundamentals. In this role, you will collaborate closely with Security, IT, and Engineering teams to align automation workflows with Zero Trust principles, enforce role-based access controls, and implement security best practices across network infrastructure. If you excel in cross-functional settings and have a proven track record of delivering innovative, secure network solutions, this role offers a unique opportunity to shape OpenAI’s security-first, automation-driven network ecosystem.nResponsibilitiesnDesign, build, implement, and maintain secure, scalable, and performant network infrastructure, automation workflows, and network security solutions.nDrive critical network and IT automation through software development and first-party tooling to optimize network operations, streamline infrastructure management, and enhance IT service delivery.nLeverage modern Infrastructure-as-Code (IaC) methodologies and GitOps-driven automation to orchestrate network infrastructure, enforce configuration consistency, and scale IT workflows efficiently.nBuild and maintain CI/CD pipelines for corporate technology infrastructure, deploying to progressively tested environments across multiple clouds (Azure, AWS, GCP).nDesign and implement scalable, network-focused internal tools and dashboards to streamline network operations, optimize network workflows, and provide real-time visibility into network performance.nCollaborate with security teams to align automation initiatives with Zero Trust principles and compliance frameworks.nImplement role-based access controls (RBAC) and mitigate security risks through automated policies.nWork cross-functionally to identify areas for network technology service improvement and implement self-service solutions.nManage multiple projects and initiatives, ensuring efficiency and alignment with business objectives.nYou may be a fit for this role if you have:nStrong experience with Cisco IOS, Cisco Meraki, Palo Alto or similar Enterprise network vendors.nStrong Routing and Switching experience including routing protocols (BGP, OSPF and MPLS).nExperience with Network monitoring tools/protocols and logging pipelines like SNMP, Syslog, Netflow, Elasticsearch (ELK Stack) and Grafana.nStrong understanding of network security principles including ACLs, Firewalls, VPN, 802.1x authentication, profiling and RBAC.nProficiency in a modern programming language (Python, Golang, Ruby, etc.).nStrong knowledge of and experience with cloud platforms (Azure, AWS, GCP) and infrastructure management.nExperience managing corporate infrastructure at scale with Infrastructure-as-Code (IaC) practices & GitOps workflows (Terraform, Ansible, Chef, etc.) as well as cloud automation best practices.nExperience integrating corporate IT infrastructure with CI/CD pipelines and DevOps workflows.nProven track record of developing and maintaining internal tools to streamline IT operations and business processes.nDemonstrated experience developing internal automation solutions, such as Slack bots and integrations.nExcellent stakeholder management skills and ability to work cross-functionally with IT, security, and business teams.nClear and concise communication skills to explain technical concepts to both technical and non-technical audiences.nA self-starter with strong analytical and problem-solving skills.nUnderstanding of wireless design, channel planning and site surveys.nYou might thrive in this role if you have:nExpertise and experience with SSL Inspection.nDeep experience with containerization technologies such as Docker and Kubernetes.nExperience with campus LAN/WAN implementations including DWDM and optical networking.nExperience with and knowledge of data center best practices including architecture design and interconnects.nThis role is based in London, UK. We use a hybrid work model of 3 days in the office per week and offer relocation assistance to new employees.nAbout OpenAInOpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity.nWe are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic.nQualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law, including the San Francisco Fair Chance Ordinance. For unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non-public information. In addition, job duties require access to secure and protected information technology systems and related data security obligations.nWe are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made by contacting OpenAI’s team. We welcome applications from all qualified individuals.nAt OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.
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OpenAI’s Platform and Infrastructure Engineering organization advances the mission of deploying artificial general intelligence (AGI) for the benefit of all by delivering secure, scalable, and resilient technology solutions. Our team builds and maintains robust infrastructure that safeguards OpenAI’s data and systems while ensuring employees are well-equipped and seamlessly connected. By prioritizing security, reliability, and user-centric solutions, we empower OpenAI employees to drive impactful AI research, corporate operations, and product innovation.nAbout the RolenAs a
Network Security Engineer
at OpenAI, you will play a critical role in architecting and maintaining both campus and cloud network infrastructure. You will design and implement secure, scalable, and high-performing network solutions that bridge on-premises environments with public cloud environments. Your expertise in routing and switching will ensure optimal network performance and reliability across diverse environments. You will drive automation initiatives through Infrastructure-as-Code (IaC) and GitOps methodologies, streamlining network provisioning, enforcing configuration consistency, and optimizing corporate technology workflows. Your responsibilities will also include developing CI/CD pipelines tailored for corporate infrastructure, enhancing deployment efficiency, and integrating robust network security measures. You will establish comprehensive observability and proactive issue resolution strategies.nWe are seeking individuals passionate about network automation, security, and scalable IT solutions that enhance both campus and cloud network operations. You should possess extensive experience with enterprise network technologies, alongside a strong foundation in network security fundamentals. In this role, you will collaborate closely with Security, IT, and Engineering teams to align automation workflows with Zero Trust principles, enforce role-based access controls, and implement security best practices across network infrastructure. If you excel in cross-functional settings and have a proven track record of delivering innovative, secure network solutions, this role offers a unique opportunity to shape OpenAI’s security-first, automation-driven network ecosystem.nResponsibilitiesnDesign, build, implement, and maintain secure, scalable, and performant network infrastructure, automation workflows, and network security solutions.nDrive critical network and IT automation through software development and first-party tooling to optimize network operations, streamline infrastructure management, and enhance IT service delivery.nLeverage modern Infrastructure-as-Code (IaC) methodologies and GitOps-driven automation to orchestrate network infrastructure, enforce configuration consistency, and scale IT workflows efficiently.nBuild and maintain CI/CD pipelines for corporate technology infrastructure, deploying to progressively tested environments across multiple clouds (Azure, AWS, GCP).nDesign and implement scalable, network-focused internal tools and dashboards to streamline network operations, optimize network workflows, and provide real-time visibility into network performance.nCollaborate with security teams to align automation initiatives with Zero Trust principles and compliance frameworks.nImplement role-based access controls (RBAC) and mitigate security risks through automated policies.nWork cross-functionally to identify areas for network technology service improvement and implement self-service solutions.nManage multiple projects and initiatives, ensuring efficiency and alignment with business objectives.nYou may be a fit for this role if you have:nStrong experience with Cisco IOS, Cisco Meraki, Palo Alto or similar Enterprise network vendors.nStrong Routing and Switching experience including routing protocols (BGP, OSPF and MPLS).nExperience with Network monitoring tools/protocols and logging pipelines like SNMP, Syslog, Netflow, Elasticsearch (ELK Stack) and Grafana.nStrong understanding of network security principles including ACLs, Firewalls, VPN, 802.1x authentication, profiling and RBAC.nProficiency in a modern programming language (Python, Golang, Ruby, etc.).nStrong knowledge of and experience with cloud platforms (Azure, AWS, GCP) and infrastructure management.nExperience managing corporate infrastructure at scale with Infrastructure-as-Code (IaC) practices & GitOps workflows (Terraform, Ansible, Chef, etc.) as well as cloud automation best practices.nExperience integrating corporate IT infrastructure with CI/CD pipelines and DevOps workflows.nProven track record of developing and maintaining internal tools to streamline IT operations and business processes.nDemonstrated experience developing internal automation solutions, such as Slack bots and integrations.nExcellent stakeholder management skills and ability to work cross-functionally with IT, security, and business teams.nClear and concise communication skills to explain technical concepts to both technical and non-technical audiences.nA self-starter with strong analytical and problem-solving skills.nUnderstanding of wireless design, channel planning and site surveys.nYou might thrive in this role if you have:nExpertise and experience with SSL Inspection.nDeep experience with containerization technologies such as Docker and Kubernetes.nExperience with campus LAN/WAN implementations including DWDM and optical networking.nExperience with and knowledge of data center best practices including architecture design and interconnects.nThis role is based in London, UK. We use a hybrid work model of 3 days in the office per week and offer relocation assistance to new employees.nAbout OpenAInOpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity.nWe are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic.nQualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law, including the San Francisco Fair Chance Ordinance. For unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non-public information. In addition, job duties require access to secure and protected information technology systems and related data security obligations.nWe are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made by contacting OpenAI’s team. We welcome applications from all qualified individuals.nAt OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.
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4
Network Security Engineer - Fully Remote
London, London
REVYBE IT RECRUITMENT LIMITED
Posted today
Job Viewed
Job Description
NetworkSecurityEngineerContractnLocation: FullyRemotenRate: Upto£450perday(InsideIR35)nDuration: 6MonthsnAbouttheRolenWeareseekinganexperienced NetworkSecurityEngineer tojoinona 6-monthcontract .Thisisa fullyremote role,offeringanopportunitytoworkonhigh-impactsecurityprojectsandinfrastructureinitiatives.Youllberesponsibleforstrengtheningthesecurityposture,managingcriticalsystems,andmitigatingrisksacrosscloudandnetworkenvironments.nKeyResponsibilitiesnManage,configure,andtroubleshoot PaloAltofirewalls toensureoptimalsecurity.nImplementandmaintain Azuresecuritycontrols ,includingidentity,networking,andmonitoringsolutions.nConfigureandmanage WebApplicationFirewalls(WAFs) toprotectagainstapplication-layerattacks.nConduct securityaudits ,reviewfindings,andproducecomprehensivereports.nProactively mitigatevulnerabilities identifiedinsecurityreportsandassessments.nCollaboratewithcross-functionalteamstoensuresecuritybestpracticesarefollowed.nStayuptodatewithemergingthreats,vulnerabilities,andindustrytrends.nSkills&ExperienceRequirednProvenexperienceasa NetworkSecurityEngineer orsimilarrole.nStronghands-onexperiencewith PaloAltofirewalls andassociatedsecuritypolicies.nStrongexperienceworkingwith AzurenSolidknowledgeof MicrosoftAzuresecurity toolsandconfigurations.nExperiencedeployingandmanaging WAFsolutions .nNetworkingexperience- CisconDemonstratedexpertisein securityaudits andremediationplanning.nAbilityto analyseandmitigatevulnerabilities fromsecurityreports.nExcellentproblem-solvingandcommunicationskills.nContractDetailsnType: InsideIR35nDuration: 6MonthsnLocation: FullyRemotenDayRate: £450nNetwork,Security,PaloAlto,Azure,WAF,SecurityAudits,Cisco
TPBN1_UKTJn
TPBN1_UKTJn
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5
Network Security Engineer, London - Fortinet, Checkpoint
London, London
CACI Network Services
Posted 1 day ago
Job Viewed
Job Description
Overview
Network Security Engineer (Deployment) – Fortinet NSE4 or abovenA Network Security Engineer is required to join the London Deployment Team, responsible for the deployment and planning of the Bank's network infrastructure in the UK, Middle–East, Africa and India.nThe team is responsible for the delivery and deployment of network/security projects and requests to enhance the client's infrastructure to meet current and future business demands:nRequired skills
Good level of Cisco Routing & SwitchingnStrong CCNA or CCNP certification or equivalent experiencenExperience with Fortinet Firewalls & ideally Checkpoint too.nFirewall Migration experience, FortiAnalyzer, FortiConverter, FortiManager.nAbility to handle numerous separate projects concurrentlynA very organised individual.nAbility to work under pressure and to tight deadlines whilst maintaining attention to detail.nAnalyse, review and understand network topologies.nCoordinate multiple projects, change management and governance efficiently working both independently and as a member of a team.nGood understanding of networking principles,nGood documentation skills using MS Office suite and VisionGood customer facing skills with the ability to keep the customer informed at all times and understand their requirementsnThis role is suitable for a Security Engineer who has at least 3 years as a Senior Project Engineer in a professional environment.nDesired skills (not essential)
Experience with Cisco ACInFortinet NSE4 Certification or abovenExperience with EVPNnCheckpoint certification or equivalent experience, CCSA, CCSEnFortinet certification or equivalent experiencenLoad Balancing Experience (F5)nResponsibilities
The role may have, but is not limited to the following functions:nPlan, manage and deploy technology changes to support DC servicesnDeploy LAN infrastructure to support end user services requirementsnIncludes patching schedules for facilities to cable network equipmentnDiagrams for Network OperationsnInventory managementnCreate implementation plans for RFC's to a high level of detail.nCorrectly document pre and post checks for change verification purposesnUnderstand and document back out plans, clearly identifying back out points.nIdentify points of no returnnSupport the stability and uptime of essential services by planning changes with a documented best approach mind set.nIdentify where changes can be complete with zero downtime to hosted services.nPlan and implement changes with a cost effective resource strategy.nIdentify, understand and document change risks and mitigation tactics.nIdentify, understand and document impact of planned technology changes, including documentation expected output from verification.nDocument network estate for Operation Support and to support change planningnMaintain infrastructure databasenComplete network diagrams to a high standard.nPeer review and validation of technical deployment plansnProvide constructive feedback to peers to support change control requirement and maintain high standards of detail and quality offered by CACI.
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Network Security Engineer (Deployment) – Fortinet NSE4 or abovenA Network Security Engineer is required to join the London Deployment Team, responsible for the deployment and planning of the Bank's network infrastructure in the UK, Middle–East, Africa and India.nThe team is responsible for the delivery and deployment of network/security projects and requests to enhance the client's infrastructure to meet current and future business demands:nRequired skills
Good level of Cisco Routing & SwitchingnStrong CCNA or CCNP certification or equivalent experiencenExperience with Fortinet Firewalls & ideally Checkpoint too.nFirewall Migration experience, FortiAnalyzer, FortiConverter, FortiManager.nAbility to handle numerous separate projects concurrentlynA very organised individual.nAbility to work under pressure and to tight deadlines whilst maintaining attention to detail.nAnalyse, review and understand network topologies.nCoordinate multiple projects, change management and governance efficiently working both independently and as a member of a team.nGood understanding of networking principles,nGood documentation skills using MS Office suite and VisionGood customer facing skills with the ability to keep the customer informed at all times and understand their requirementsnThis role is suitable for a Security Engineer who has at least 3 years as a Senior Project Engineer in a professional environment.nDesired skills (not essential)
Experience with Cisco ACInFortinet NSE4 Certification or abovenExperience with EVPNnCheckpoint certification or equivalent experience, CCSA, CCSEnFortinet certification or equivalent experiencenLoad Balancing Experience (F5)nResponsibilities
The role may have, but is not limited to the following functions:nPlan, manage and deploy technology changes to support DC servicesnDeploy LAN infrastructure to support end user services requirementsnIncludes patching schedules for facilities to cable network equipmentnDiagrams for Network OperationsnInventory managementnCreate implementation plans for RFC's to a high level of detail.nCorrectly document pre and post checks for change verification purposesnUnderstand and document back out plans, clearly identifying back out points.nIdentify points of no returnnSupport the stability and uptime of essential services by planning changes with a documented best approach mind set.nIdentify where changes can be complete with zero downtime to hosted services.nPlan and implement changes with a cost effective resource strategy.nIdentify, understand and document change risks and mitigation tactics.nIdentify, understand and document impact of planned technology changes, including documentation expected output from verification.nDocument network estate for Operation Support and to support change planningnMaintain infrastructure databasenComplete network diagrams to a high standard.nPeer review and validation of technical deployment plansnProvide constructive feedback to peers to support change control requirement and maintain high standards of detail and quality offered by CACI.
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6
Network Security Consultant
EC1 London, London
Ascendion
Posted 11 days ago
Job Viewed
Job Description
Description
The Network Security Consultant will provide delivery leadership within the Professional Services consultancy team primarily aligned to clients in the USA region. This client-facing role includes the following responsibilities.
Personal/General
Maintain day to day records of project work to allow accurate billing and reporting of consultancy time;
- Maintain effective network of business contacts within Verizon and their partner community; li>Maintain and grow their own knowledge to ensure this maintains fully relevant to the network security services practice and its clients;
- Have strong presentation and written/verbal communications skills at multiple levels of an organization;
- Have a minimum of 5+ years of network security consulting, design and delivery experience.
As a Network Security Consultant you will bring –
Technical expertise with very strong skills in most of the technologies below:
- < i>Firewalls: Checkpoint, Juniper, Palo Alto, Cisco ASA/FTD, Fortinet;
- Proxy Services: Bluecoat (forward/reverse proxy), Zscaler;
- Load Balancers: F5 (LTM/GTM);
- IDP/IPS: FirePower/Sourcefire IPS/IDS, McAfee
- Identity & Access Management: Cisco ISE, Aruba Clearpass policy manager;
- Routing & Switching : (CCNP/CCNA level), and good knowledge of SD-WAN deployments;
- Good understanding of key technologies such as: VRF, dynamic routing (EIGRP/BGP/OSPF), MPLS, DMVPN, GRE, IPSec VPN
- Remote Access VPN: GlobalProtect, Pulse Secure, Cisco AnyConnect;
- Knowledge of Cloud deployments (Azure/AWS/GCP);
- Experience with building, maintaining, reviewing all configurations/settings/policies on chosen technologies;
- Experience of multi-vendor, managed outsourcing environments;
- Experience working with operational environments following ITIL frameworks;
- Excellent documentation and presentation skills;
- Excellent troubleshooting skills (technical and non-technical);
- Ability to review processes and procedures – and improve them; < i>Experience participating in network & system security projects to provide:
- Business requirements analysis and support for Solutions Architects;
- Production of detailed infrastructure designs including physical and virtual aspects of security components;
- Migration of complex legacy infrastructures to new managed security services platforms;
- Understanding and demonstrable experience working in an Agile environment and actively participating in a Scrum team;
- Experience using Jira to help define user stories, tasks and associated estimates.
It is likely that you will have gained some of the following professional qualifications:
- CCNA/CCNP (Enterprise/Security/Data Center);
CISSP or equivalent; - Palo Alto (PCNSA/PCNSE);
- Checkpoint (CCSA/CCSE);
- Fortinet (NSE)
This advertiser has chosen not to accept applicants from your region.
7
Network Security Consultant
London, London
Ascendion
Posted 11 days ago
Job Viewed
Job Description
Description
The Network Security Consultant will provide delivery leadership within the Professional Services consultancy team primarily aligned to clients in the USA region. This client-facing role includes the following responsibilities.
Personal/General
Maintain day to day records of project work to allow accurate billing and reporting of consultancy time;
- Maintain effective network of business contacts within Verizon and their partner community; li>Maintain and grow their own knowledge to ensure this maintains fully relevant to the network security services practice and its clients;
- Have strong presentation and written/verbal communications skills at multiple levels of an organization;
- Have a minimum of 5+ years of network security consulting, design and delivery experience.
As a Network Security Consultant you will bring –
Technical expertise with very strong skills in most of the technologies below:
- < i>Firewalls: Checkpoint, Juniper, Palo Alto, Cisco ASA/FTD, Fortinet;
- Proxy Services: Bluecoat (forward/reverse proxy), Zscaler;
- Load Balancers: F5 (LTM/GTM);
- IDP/IPS: FirePower/Sourcefire IPS/IDS, McAfee
- Identity & Access Management: Cisco ISE, Aruba Clearpass policy manager;
- Routing & Switching : (CCNP/CCNA level), and good knowledge of SD-WAN deployments;
- Good understanding of key technologies such as: VRF, dynamic routing (EIGRP/BGP/OSPF), MPLS, DMVPN, GRE, IPSec VPN
- Remote Access VPN: GlobalProtect, Pulse Secure, Cisco AnyConnect;
- Knowledge of Cloud deployments (Azure/AWS/GCP);
- Experience with building, maintaining, reviewing all configurations/settings/policies on chosen technologies;
- Experience of multi-vendor, managed outsourcing environments;
- Experience working with operational environments following ITIL frameworks;
- Excellent documentation and presentation skills;
- Excellent troubleshooting skills (technical and non-technical);
- Ability to review processes and procedures – and improve them; < i>Experience participating in network & system security projects to provide:
- Business requirements analysis and support for Solutions Architects;
- Production of detailed infrastructure designs including physical and virtual aspects of security components;
- Migration of complex legacy infrastructures to new managed security services platforms;
- Understanding and demonstrable experience working in an Agile environment and actively participating in a Scrum team;
- Experience using Jira to help define user stories, tasks and associated estimates.
It is likely that you will have gained some of the following professional qualifications:
- CCNA/CCNP (Enterprise/Security/Data Center);
CISSP or equivalent; - Palo Alto (PCNSA/PCNSE);
- Checkpoint (CCSA/CCSE);
- Fortinet (NSE)
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8
.NET Core + Network Security
London, London
N Consulting Limited
Posted today
Job Viewed
Job Description
LocationBloomsbury Square, London, United Kingdom# .NET Core + Network Security at N Consulting LtdLocationBloomsbury Square, London, United KingdomSalary£300 - £350 /dayJob TypeContractDate PostedSeptember 8th, 2025Apply Now**Main Technologies:***Backend:** ASP.NET, .NET Framework/Core**Frontend:** Web development experience (HTML, CSS, JavaScript, and frameworks as applicable)**Networking / Security:** Some experience with network security, firewall rules, or related concepts**Additional Advantage:**Exposure to **Palo Alto Networks** products or similar firewall solutions**Role Overview:**
The candidate will primarily focus on developing **ASP/.NET applications**, with occasional involvement in frontend tasks. Familiarity with network security principles and firewall rules is a plus, and experience with **Palo Alto Networks** products is highly desirable.**Position:** .NET / ASP Developer (with Firewall / Network Security Exposure)
**Location:** London
(Hybrid Contract)n#J-18808-Ljbffrn
The candidate will primarily focus on developing **ASP/.NET applications**, with occasional involvement in frontend tasks. Familiarity with network security principles and firewall rules is a plus, and experience with **Palo Alto Networks** products is highly desirable.**Position:** .NET / ASP Developer (with Firewall / Network Security Exposure)
**Location:** London
(Hybrid Contract)n#J-18808-Ljbffrn
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9