3,079 Cryptography jobs in the United Kingdom

• Design, develop, and implement advanced cryptographic algorithms and protocols.
• Conduct in-depth security reviews and vulnerability assessments of cryptographic implementations.
• Develop and maintain secure key management systems and practices.
• Ensure cryptographic solutions meet stringent security, performance, and scalability requirements.
• Collaborate with software and hardware engineers to integrate cryptographic functionalities into products.
• Research and evaluate new cryptographic techniques and technologies.
• Contribute to the definition of the company's security architecture and strategy.
• Mentor and guide junior cryptography and security engineers.
• Author technical documentation and present findings to technical and non-technical audiences.
• Stay current with the latest advancements in cybersecurity and cryptography.

• Ph.D. or Master's degree in Computer Science, Electrical Engineering, Mathematics, or a related field with a specialization in Cryptography or Computer Security.
• Minimum of 8 years of professional experience in applied cryptography and security engineering.
• Deep understanding of symmetric and asymmetric encryption, hashing, digital signatures, TLS/SSL, and other cryptographic primitives.
• Proficiency in programming languages such as C/C++, Python, or Rust for implementing security solutions.
• Experience with hardware security modules (HSMs) and trusted execution environments (TEEs) is a plus.
• Strong knowledge of common security vulnerabilities and mitigation techniques.
• Excellent analytical, problem-solving, and critical thinking skills.
• Superior written and verbal communication skills, with the ability to articulate complex technical concepts.
• Demonstrated leadership experience and the ability to mentor technical staff.

Summary

As a Senior Cryptography Engineer in Applied Cryptography, you must be an engineer, an architect, an applied cryptographer and leader - it’s a multifaceted role. You have the exciting challenge of working with bleeding-edge research and technology, always with a focus on the market's needs. You will be a leader to an exceptional team. Working on everything from Post-Quantum prototypes to hand-optimisation of existing primitives to completely new products. To support you on this challenge, we have software architects, product managers, project managers, formal methods specialists and QA test engineers, with whom you must have high bandwidth communications.

You must possess a pragmatic mindset for building great products, knowing how to balance features, compromise, technical debt and effort, in order to get products shipped whilst their market impact is high.

Duties

• Champion of the applied cryptography team
• Captain end to end development and delivery of new products
• Spearhead prototyping of cryptographic products
• Translate research into rigorous engineering specifications & implementations
• Meticulously review cryptographic protocols and proposed primitives

Requirements

Key Competencies 

• Expert knowledge of  ZK protocols, including PlonK, Halo2 and IPA commitment scheme
• Expert knowledge of elliptic curve cryptography
• Familiarity with blockchain  cryptography and constructions
• Practical experience with implementation of cryptographic primitives
• Expert in terms of secure design (constant time, operational security, management of key material)
• Document code and APIs concisely and unambiguously
• Pragmatically adhere to software engineering principles (modularity, incremental development, no premature optimization, no feature creep, no speculative generality, .)
• Security sensibility related to cryptographic implementation
• Good theoretical cryptography and mathematical knowledge
• Ability to read cryptographic papers, explain them, and manage delivery of their implementation
  

Education / Experience

• Degree in Computer Science/Engineering or Applied Mathematics is desirable but not essential  
• A minimum of 4-5 years development experience (professional or otherwise) in Rust 
• Experience working with Git and version control
• Expert knowledge of applied cryptographic engineering & best practices

Benefits

Location

IOG is a fully distributed organization but due to team distribution, we require someone to be based either in Ireland, the UK or Poland.

All colleagues

• Flexible schedule
• Remote work
• Laptop reimbursement
• New starter package to buy hardware essentials (headphones, monitor, etc)
• Learning & Development opportunities
• Competitive PTO and Sick Leave plan

UK & Ireland Employees

• Monthly Health Stipend to use towards any wellness or medical coverage/service
• Pension

At IOG, we value diversity and always treat all employees and job applicants based on merit, qualifications, competence, and talent. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Short Description

Location - Cheshire

About the job you’re considering

This role is focused on cryptographic operations and infrastructure management within a secure IT environment. It supports the organisation’s broader crypto and security strategy by ensuring the availability, integrity, and governance of cryptographic services and key management systems. The role involves working with HSMs, SSH keys, certificates, and various platforms (IBM, Tandem, Unix), while also contributing to incident, change, and risk management processes.

Hybrid working: The places that you work from day to day will vary according to your role, your needs, and those of the business; it will be a blend of Company offices, client sites, and your home; noting that you will be unable to work at home 100% of the time.

If you are successfully offered this position, you will go through a series of pre-employment checks, including: identity, nationality (single or dual) or immigration status, employment history going back 3 continuous years, and unspent criminal record check (known as Disclosure and Barring Service)

Your role

• Managing cryptographic hardware (e.g., HSMs) including configuration, installation, and support.
• Generating and managing cryptographic keys across multiple platforms and maintaining certificate and SSH key management systems.
• Ensuring compliance with IT security standards and audit requirements.
• Supporting incident, change, and problem management processes (aligned with ITIL).
• Collaborating with stakeholders to schedule and deliver crypto services within SLAs.
• Contributing to project delivery and continuous improvement of crypto operations.

You can bring your whole self to work. At Capgemini building an inclusive future is part of everyday life and will be part of your working reality. We havebuilt a representative and welcoming environment, for everyone.

Your skills and experience

• Implementing and managing Hardware Security Module (HSM) solutions eg Luna and/or Entrust
• Broad experience in delivering cryptography or other cyber security solutions
• Familiarity with ITIL processes (ITIL Foundation certified).
• Strong stakeholder management and communication skills.
• Familiarity with Unix,/ Windows OS SharePoint, Confluence, JIRA.
• Understanding of change and release management.

Your security clearance

To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance .

To obtain SC clearance, the successful applicant must have resided continuously within the United Kingdom for the last 5 years, along with other criteria and requirements.

Throughout the recruitment process, you will be asked questions about your security clearance eligibility such as, but not limited to, country of residence and nationality.

Some posts are restricted to sole UK Nationals for security reasons; therefore, you may be asked about your citizenship in the application process.

What does ‘Get The Future You Want ‘ mean for you?

You will be joining one of the World’s Most Ethical Companies®, as recognised by Ethisphere®. We live our values by making ethical business choices every day. Working ethically is at the centre of our culture at Capgemini, meaning you will be helping to create a future we can all be proud of.

We realise a Total Reward package should be more than just compensation. At Capgemini we offer range of core and flexible benefits and have a Peer Recognition Portal called Applaud.

You will be empowered to explore, innovate, and progress. You will benefit from Capgemini’s ‘learning for life’ mindset, meaning you will have countless training and development opportunities from thinktanks to hackathons, and access to 250,000 courses with numerous external certifications from AWS, Microsoft, Harvard ManageMentor, Cybersecurity qualifications and much more.

You’ll be bringing your unique skills and perspectives to the team, inspiring and taking inspiration from your teammates as you unlock value in everything you do. You’ll be joining a professional community of experts, who have got your back and will support you, every step of the way. Capgemini. Get The Future You Want.

Why you should consider Capgemini

Growing clients’ businesses while building a more sustainable, more inclusive future is a tough ask.  When you join Capgemini, you’ll join a thriving company and become part of a collective of free-thinkers, entrepreneurs and industry experts.  We find new ways technology can help us reimagine what’s possible.  It’s why, together, we seek out opportunities that will transform the world’s leading businesses, and it’s how you’ll gain the experiences and connections you need to shape your future.  By learning from each other every day, sharing knowledge, and always pushing yourself to do better, you’ll build the skills you want. You’ll use your skills to help our clients leverage technology to innovate and grow their business. So, it might not always be easy, but making the world a better place rarely is.

About Capgemini

Capgemini is a global business and technology transformation partner, helping organisations to accelerate their dual transition to a digital and sustainable world, while creating tangible impact for enterprises and society. It is a responsible and diverse group of 340,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fuelled by its market leading capabilities in AI, generative AI, cloud and data, combined with its deep industry expertise and partner ecosystem. The Group reported 2024 global revenues of €22.1 billion.

Get The Future You Want |

• Design, implement, and maintain network security infrastructure, including firewalls, VPNs, IDS/IPS, and web application firewalls (WAFs).
• Monitor network traffic for security threats and anomalies, performing in-depth analysis of security alerts and incidents.
• Conduct vulnerability assessments and penetration testing on network systems and applications.
• Develop and enforce network security policies, standards, and procedures.
• Manage and configure security devices and software to ensure optimal performance and effectiveness.
• Respond to and investigate security incidents, providing timely and effective remediation.
• Collaborate with IT operations teams to integrate security best practices into network design and deployment.
• Stay current with emerging network security threats, vulnerabilities, and technologies, and recommend appropriate countermeasures.
• Develop and deliver security awareness training related to network security best practices.
• Assist in ensuring compliance with relevant security standards and regulations.

• Bachelor's degree in Computer Science, Cybersecurity, Information Technology, or a related field, or equivalent work experience.
• Minimum of 4 years of experience in network security engineering or a similar role.
• Strong understanding of TCP/IP networking, routing protocols, and network architectures.
• Hands-on experience with network security tools and technologies (e.g., Cisco ASA/Firepower, Palo Alto Networks, Fortinet, Snort).
• Experience with intrusion detection/prevention systems, SIEM solutions, and endpoint security.
• Knowledge of security frameworks such as NIST, ISO 27001, and relevant compliance regulations.
• Excellent analytical, problem-solving, and troubleshooting skills.
• Strong communication and collaboration skills, with the ability to work effectively in a hybrid team environment.
• Relevant security certifications such as CCNA Security, CCNP Security, CompTIA Security+, or CISSP are highly desirable.
• Experience with cloud network security (e.g., AWS, Azure) is a plus.

Information Security Analyst | Security+, Microsoft Purview, Defender | Global Trading Platform

• £60–70k base + 10% bonus
• Hybrid in Coventry with monthly travel to London
• Security certification support & career development built-in

Join a growing InfoSec team at the heart of a global financial institution’s expansion. As an Analyst, you’ll work hands-on with data governance, security tooling, and access management — helping to shape how a modern SME approaches cybersecurity. You’ll bring technical curiosity, the ability to interrogate data, and the confidence to advise IT teams on the practical steps that keep the business secure.

What you’ll bring:

• 3+ years’ experience in an InfoSec, IT security, or analyst role
• Security certifications: Security+ and ideally Microsoft security certifications (e.g. SC-200/SC-400)
• Experience with security tools (Microsoft Defender, web proxy, email security, CrowdStrike or equivalents)
• Knowledge of single sign-on and zero trust networks (beyond just segregation)
• Exposure to data management / governance tools (e.g. Microsoft Purview, or similar)
• Strong communicator: able to translate technical concepts into practical advice for IT and stakeholders

What you’ll be doing:

• Recertification of accounts : Pulling and interrogating data through bespoke platforms
• Security tooling : Working with Defender, web proxy, CrowdStrike-equivalent tools
• Data management : Supporting data labelling & retention projects using Purview or similar
• Governance support : Involved in data loss prevention, labelling, and stakeholder engagement (including DPO)
• Practical incident response input : Advising IT on immediate steps during incidents, converting theory into quick, actionable responses
• Ongoing InfoSec operations : Metrics, monitoring, and security projects across applications and users

Tech & tools you’ll use:

• Microsoft Purview – Data governance and policy enforcement
• Microsoft Defender – Endpoint & email protection
• CrowdStrike / equivalents – Endpoint detection & response
• Web proxy & email security tools
• Azure (beneficial) – IAM, monitoring, and security logging

Why this role?

• Be central to shaping data governance and security operations in a dynamic SME environment
• Hands-on exposure to a wide range of security tools and concepts (not siloed to audit work)
• Opportunity to advise and influence IT directly on practical security decisions
• Work alongside experienced InfoSec leadership who value mentoring and professional growth

If this sounds like something you would be interested in, please apply!

Information Security Analyst | Security+, Microsoft Purview, Defender | Global Trading Platform

Information Security Consultant - Virtual CISO (vCISO)

Up to £80,000 | Fully Remote (with occasional client travel)

My client is seeking an experienced cyber security professional to step into a Virtual CISO (vCISO) role, acting as a trusted advisor to a diverse portfolio of organisations. This is an opportunity to directly influence and shape cyber security strategies at board level while embedding yourself as a valued extension of your clients’ security teams.

Key Responsibilities

• Serve as a strategic security partner, helping clients to define, develop, and mature their cyber security roadmap.
• Build strong, long-term relationships with stakeholders and establish yourself as a core member of their security function.
• Take ownership of client-specific Security Improvement Plans, ensuring risks are reduced and resilience is increased.
• Lead governance and oversight activities, including risk reviews, board-level reporting, and mentoring client teams.
• Carry out security reviews across cloud, hybrid, and on-premises environments, identifying vulnerabilities and improvement areas.
• Work closely with SOC teams to review threat hunting outcomes and ensure remediation of poor practices.
• Provide guidance on compliance and frameworks such as ISO 27001, Cyber Assessment Framework (CAF), and Cyber Essentials.
• Contribute to incident readiness and response as part of the Cyber Security Incident Response Team (CSIRT).
• Actively contribute to the internal growth and knowledge-sharing within the wider team, suggesting improvements and supporting colleagues.
• Ensure compliance with internal security and governance standards.

About You:

• Proven experience as a CISO, vCISO, or senior cyber security advisor.
• Strong knowledge of security frameworks, governance, risk management, and compliance.
• Excellent communication and stakeholder engagement skills, with the ability to influence at board level.
• Hands-on experience with cloud and hybrid architectures, audits, and security assessments.
• Incident response and crisis management experience is a plus.
• Holding CISSP/CISM
• ISO27001 Lead implementer

What’s on Offer

• Salary up to £80,000
• Fully remote role with flexibility to travel to client sites when required
• Opportunity to work across varied industries, influencing security at the highest levels

If you’re looking for a role where you can combine strategic influence with hands-on expertise, and you thrive on building trusted client relationships, this could be your next career move.

Information Security Manager - Rail Sector, URGENT HIRE

Lawrence Harvey is delighted to be exclusively supporting a leading rail client once again to support with the growth of their exceptional technology team for their Information Security Manager.

The Role:

• Leading management of information security which includes ISO27001, PCI-DSS, and vulnerability management.
• Working alongside the DPO and Head of Technology to support on areas of data protection.
• Lead collaboration with key partners for train onboard systems cyber security assessments and risk management
• Establish and maintain appropriate policies, procedures, and practices in relations to cyber, data and governance practices
• Manage the information security incident response program
• Manage implementation and deployment of Information Security Management System (ISMS).
• Line management of the internal InfoSec specialists.

Requirements

• Extensive experience working with PCI-DSS and ISO27001
• Strong understanding on security tools such as IDS/IPS.
• Demonstrable experience of leading Information Security, Governance, Compliance teams.
• Ideally a form of cybersecurity qualification such as CISM or CISSP

Benefits:

• Salary between £55,000 - £70,000
• Hybrid working 3 days on site, 2 days at home.
• Working in Euston or Birmingham office.
• & more.

Sponsorship is not available for this position and the successful candidate will be subject to toxicology screening as standard for the rail industry.

We are looking for this hire ASAP so those will short (1 month or less) notice periods are encouraged to apply.