79 Security Testing jobs in London

Security Engineer

Location: London & surrounding areas (with occasional UK travel)

Salary: £40,000 – £5,000 per year (depending on experience)

Job Type: Full-time, Permanent

Role Overview

You’re an experienced Security Engineer looking for the next step in your career. In this role, you’ll take ownership of installations, service, and maintenance across a wide range of security systems, with a strong focus on commercial projects in Central London.

This is more than just hands-on engineering work — you’ll also play a key leadership role, acting as the first point of contact on-site, supporting junior engineers, and positioning yourself for progression into a supervisory or managerial role.

What You’ll Be Doing

• Installing, servicing, and maintaining a range of fire and security systems.
• Acting as lead engineer on-site and offering technical support to junior engineers.
• Joining the emergency call-out rota (evenings, weekends, and bank holidays).
• Travelling daily into Central London, with occasional UK-wide projects.
• Working in sensitive environments where enhanced DBS clearance is required.
• Managing both domestic and commercial projects, with an emphasis on commercial sites.
• Providing excellent customer service and ensuring clear communication at all times.
• Using company equipment, PPE, and tools responsibly.

What You’ll Need

Systems Knowledge (Hands-On Experience With):

• Intruder Alarms: Texecom, Scantronic, Pyronix, EMS.
• Access Control: Paxton (essential), PAC (desired).
• Door Entry: BPT, Fermax, Net2, Videx, Comelit.
• CCTV: Hikvision, DVR/NVR, IP & Analogue networks.

Other Requirements:

• Strong leadership, mentoring, and communication skills.
• Full UK driving licence.
• Right to work in the UK.
• Flexibility to work out-of-hours on a rota basis.
• Ambition to step up into a supervisory/management role.

Desirable Certifications & Training:

• City & Guilds 1853.
• Manufacturer training
• IPAF, PASMA, ECS Card.

What You’ll Get

• Salary up to £55,000 (depen ng on experience).
• Company van & fuel card with paid parking.
• Laptop, PDA, and mobile phone.
• Calibrated testing equipment, PPE & full uniform.
• Paid call-out standby.
• Auto-enrolment pension scheme.
• Recruitment referral bonus.
• Clear career path to supervisory and management roles.

Your Next Step

If you’re an experienced Security Engineer ready to lead from the front, mentor others, and develop into a supervisory role, this opportunity is for you.

Apply today and take the next step in your career.

Security Engineer

Our Client requires a Contract Security Engineer to identify gaps in security, identify root causes, work with stakeholders to remediate software and hardware issues.

• Day Rate: £650-£700pd
• IR35 Status: Inside
• Travel: 3 days a week in Central London (2 WFH)
• Duration: 6 Months initially

This Security Engineer will have the previous following experience:

• Captures, refines, and embeds information security requirements into systems and configurations, ensuring alignment with organisational needs.
• Conducts security reviews and risk assessments to identify vulnerabilities, develop risk mitigation plans, and strengthen overall security posture.
• Documents and maintains security processes, procedures, and controls across infrastructure, hardware, and software environments.
• Partners with internal teams and external vendors to ensure effective communication, risk remediation, and shared accountability for security outcomes.
• Demonstrates strong knowledge of security engineering and risk management practices, translating complex technical concepts into clear guidance for diverse stakeholders.
• Hands-on experience configuring and managing security across multi-cloud environments, including GCP, AWS, and Azure.
• Skilled in implementing a wide array of security controls such as secure SDLC practices, firewalls, email and web filtering, WAFs, VNC, Kubernetes security, mobile verification toolkits, client-side encryption, API protection, IDS/IPS, SIEM configuration, and CIS hardening standards

YeagerAI is a pioneering AI research lab dedicated to revolutionizing the way humans and artificial intelligence interact. We are operating at the intersection of blockchain technology and AI to build GenLayer, a groundbreaking blockchain that integrates AI in its consensus algorithm to create smart contracts that are intelligent and capable of connecting to the internet. With GenLayer, developers can build decentralized applications that leverage the power of AI to automate complex processes, make smart decisions, and interact with the real world in ways that were previously impossible.

We are looking for a skilled Security Engineer to safeguard our cutting-edge Intelligent Blockchain platform. In this role, you will drive the security of our decentralized AI ecosystem by providing expert recommendations, enhancing network security, and proactively identifying vulnerabilities. You will collaborate with cross-functional teams to ensure robust security architecture and translate emerging security concepts into actionable designs. If you are passionate about cybersecurity, blockchain, and AI, this is your opportunity to make a significant impact in a rapidly evolving industry.

• Security Design and Decision-Making: Lead the decision-making process for technical designs by providing security recommendations and risk mitigation strategies to ensure the integrity of Genlayer’s Intelligent Blockchain.
• Network Security Enhancement: Strengthen the organization’s network security posture by developing and implementing advanced procedures and strategies tailored to decentralized systems.
• Threat Modeling and Risk Assessments: Conduct threat model sessions and perform comprehensive risk assessments to identify potential vulnerabilities in Genlayer’s platform and processes.
• Developer Consultation: Advise developers on security architecture, cryptography-related concerns, and best practices to ensure secure implementation of Intelligent Contracts and LLMs.
• Security Research and Innovation: Research emerging security concepts, including advancements in cryptography and blockchain security, and translate findings into actionable design descriptions for integration into Genlayer’s ecosystem.
• Proactive Vulnerability Identification: Actively identify and address internal security gaps within Genlayer’s products, infrastructure, and organizational processes to maintain a robust security posture.

Requirements

• Experience:
• 3+ years of experience in cybersecurity, with a focus on network security, threat modeling, or risk assessments.
• Experience with blockchain technology, decentralized systems, or AI-driven platforms is highly desirable.
• Proven track record of consulting on security architecture and cryptography.
• Technical Skills:
• Strong understanding of network security principles, protocols, and tools.
• Expertise in threat modeling methodologies (e.g., STRIDE, DREAD) and risk assessment frameworks (e.g., NIST SP 800-30).
• Proficiency in cryptography, including elliptic curve cryptography, homomorphic encryption, or blockchain-specific encryption methods.
• Familiarity with secure software development practices and tools for vulnerability scanning (e.g., YARA, penetration testing tools).
• Knowledge of blockchain protocols and smart contract security is a plus.
• Soft Skills:
• Excellent problem-solving skills with a proactive approach to identifying and mitigating risks.
• Strong communication skills to collaborate with developers and translate complex security concepts into actionable recommendations.
• Ability to work independently in a remote environment while thriving in a fast-paced, innovative team.

• Education:
• Bachelor’s degree in Computer Science, Cybersecurity, or a related field, or equivalent professional experience. Relevant certifications (e.g., CISSP, CEH, OSCP) are a plus.

Benefits

• Total rewards package including competitive salary, equity package, and benefits.
• Flexible and remote work environment.
• Opportunity to build the marketing function for a VC-backed start-up at the intersection of blockchain and AI
• Professional development and growth opportunities.
• Be a part of a dynamic and innovative team that is shaping the future of decentralized applications.

Join YeagerAI and be a part of a team that is pushing the boundaries of what is possible with AI and blockchain technology.

• Strong background in network and infrastructure security.
• Experience performing penetration testing, configuration reviews, and API testing.
• Knowledge of “classic” CHECK-style testing methodologies.
• CREST, CSTL or CTL certification (Team Member or Team Leader level).
• Ability to deliver high-quality reports and communicate technical findings clearly.
• Hands-on experience across infrastructure, networking, and external testing.

• Experience working within CHECK or other accredited testing schemes.
• Strong understanding of secure network architecture and hardening practices.
• Previous consultancy or project-based testing experience.

• Outside IR35
• West London (on-site presence required for majority of testing)
• 0-hours contract – project-based work, phase by phase
• Initial phase focused on network testing, with further phases planned into next year
• Day Rate: Competitive
• Start: ASAP
• 1-Stage Interview Process with consultancy SME
  

We are working with a next-generation prime brokerage and financing platform , redefining trade and capital management for both traditional and digital assets. Our client is on a mission to build the leading global credit network for institutions, combining deep financial expertise with state-of-the-art technology.

We’re looking for a world-class Security Operations Engineer to join their growing security team. You will help protect infrastructure and clients’ data, ensuring the confidentiality, integrity, and availability of systems across the firm.

What you’ll do:

• Detect, investigate, and respond to security events across systems and networks.
• Conduct threat analysis on malware, phishing, network intrusions, and other cybersecurity risks.
• Build and improve detection rules, analytics, and automation to enhance Security Operations workflows.
• Integrate modern tools, including AI and LLMs, to support security monitoring and response.
• Maintain and optimize critical security tools (SIEM, EDR, DLP, etc.).
• Assist with vulnerability management, including scanning, assessment, and remediation.
• Collaborate with IT and business teams to implement security improvements and enforce policies.
• Document incidents and provide actionable recommendations to enhance cybersecurity posture.
• Stay ahead of emerging threats, trends, and best practices.
• Ensure compliance with regulatory requirements and internal security policies.

What we’re looking for:

• Strong experience in security operations, incident response, or SOC roles.
• Hands-on knowledge of SIEM, EDR, DLP, or similar security tools.
• Experience with automation (Python, PowerShell, SOAR) and integrating AI tools into workflows.
• Understanding of capital markets, trading platforms, or fintech environments is a plus.
• Excellent analytical skills and the ability to work collaboratively across teams.

Why join?

• Be part of a fast-growing fintech company transforming capital markets.
• Work with cutting-edge technologies, including AI-driven automation.
• Collaborative and innovative culture that values ideas and initiative.
• Competitive compensation and growth opportunities.