Top Cyber Security Jobs in London

Lead mobile security architecture, penetration testing, threat modeling, security assessments, and control implementation across Android and iOS platforms. Define secure technical strategies, develop mitigation plans, advise clients, and drive security quality and compliance. The role also contributes to mobile development, DevSecOps, reverse engineering, security research, Agile practices, technical roadmaps, and continuous improvement across front-end and back-end systems.

Lead product security assessments, threat model features, triage and own vulnerability lifecycle from bug bounty, SAST, fuzzing, and pentests. Build AI/LLM-driven automation and tooling to scale triage and enrichment, mentor engineers, and influence security across distributed cloud products.

Conduct threat models and security reviews for Cloudflare products, triage and manage vulnerability lifecycle (bug bounties, SAST, fuzzing, pentests), build AI/LLM-driven automation tooling for triage and enrichment, coordinate pentests and remediation with engineering, and act as the product security point of contact.

Conduct attacker-driven security research on Aave protocol changes, smart contracts, integrations, and critical dependencies. Review architecture and code before audits or deployment, identify exploitable protocol risks, contribute to AI-assisted security tooling, and translate findings into invariants, testing, monitoring, and incident-response improvements. Collaborate with engineers, auditors, and monitoring teams while communicating risk, severity, uncertainty, and trade-offs clearly.

Provides Level-1 triage and first-line support for network and security infrastructure. Responsibilities include handling service tickets, troubleshooting incidents, escalating issues according to SLAs, communicating with customers and internet service providers, supporting change requests, documenting technical procedures, and working flexible shifts. The role involves exposure to routing, switching, SD-WAN, firewalls, monitoring, DNS, DHCP, and ITSM platforms.

Execute and maintain ISO 27001 and SOC 2 compliance programs, operate Vanta, collect audit evidence, support audits, assess risks and vendors, manage security obligations, maintain regulatory documentation, and translate controls into engineering work. The role also supports customer security reviews, physical security, incident compliance, awareness training, business continuity, and disaster recovery evidence.

Manage and grow cybersecurity channel partnerships, primarily in Germany, by recruiting partners, driving pipeline and revenue, coordinating joint sales and marketing initiatives, and managing partner performance. Build relationships with resellers, distributors, systems integrators, and technology vendors; support partner planning, compliance, opportunity registration, and conflict resolution. The role requires native German and fluent English, security SaaS channel sales experience, Salesforce and PRM knowledge, and travel up to 50%.

Designs and operates secure, scalable AWS infrastructure and reusable Terraform modules. Owns CI/CD, GitOps, observability, reliability, automation, and cost optimization. Builds production platforms for AI agents and LLM-backed services, including identity, access controls, secrets, evaluation, regression testing, and operational safeguards. Mentors engineers, communicates technical trade-offs, and supports broader platform and developer-experience strategy.

Lead application security for the platform by embedding automated controls into the SDLC, conducting security architecture and code reviews, driving threat modeling, triaging vulnerabilities, coordinating remediations, partnering with engineering/product teams, and scaling tooling and AI-assisted workflows to raise security across cloud-native and containerized environments.

Lead SecOps and vulnerability management architecture: design and scale SIEM, SBOM, VM platforms, SOAR playbooks, and detection logic; drive threat modeling, incident escalation, automation, AI-assisted validation, and regulatory/audit support across cloud and product teams.

Lead design and execution of blockchain security operations: monitor on-chain/off-chain data, detect and respond to threats, collaborate cross-functionally, improve security posture, and implement detection for smart contracts and digital assets.

Drive growth of HPE's security portfolio by building long-term pipelines, winning complex enterprise deals, supporting account teams, engaging C‑suite stakeholders, and coordinating partners. Sell hardware, software, and services; manage deal orchestration, forecasting, CRM discipline, and customer references to achieve high-value quotas and renewals.

Lead end-to-end incident response for high-severity security events across cloud environments, perform DFIR investigations, build detection and automation (including AI-assisted) workflows, partner cross-functionally, produce executive communications and RCAs, maintain runbooks/playbooks, and mentor other engineers within a 24/7 global on-call model.

Own Spiko’s end-to-end security strategy across applications, infrastructure, cloud, identity, vulnerability management, testing, detection, and incident response. Lead ISO 27001 certification, DORA implementation, security policies, controls, and audit evidence. Support partner security due diligence and help position security as a sales differentiator. Define the security roadmap autonomously and build a strong company-wide security culture.

Owns an AI neobank product vertical end to end, including strategy, metrics, roadmap, technical design, delivery, and launch. The role involves shaping reliable financial systems across APIs, data flows, ledgering, reconciliation, security, scalability, and regulatory requirements. Responsibilities include applying AI with safeguards and evaluation, managing financial rails and third-party dependencies, and aligning engineering, design, compliance, operations, treasury, and finance. Candidates need strong technical product management experience in regulated financial or other high-consequence domains.

Drive and expand enterprise accounts by building strategic executive relationships, managing pipeline and CRM, positioning SHI IT solutions, collaborating with pre/post-sales teams, and meeting revenue and profit targets.

Build and secure backend systems that execute untrusted user code at scale. Responsibilities include designing sandboxed runtimes, threat detection, incident response, vulnerability management, penetration testing, security reviews, vulnerability disclosure, SOC 2 maintenance, and promoting security practices across engineering. The role requires backend engineering, offensive-security curiosity, runtime isolation experience, on-call participation, and collaboration with an open-source developer tools community.

Own technical direction and execution for major products and systems. Design scalable backend, frontend, API, database, and infrastructure solutions; write code; prototype; review code; debug production issues; make architecture trade-offs; convert ambiguous problems into execution plans; improve engineering quality; lead critical initiatives; and mentor engineers.

Lead and expand the VAR channel strategy in EMEA, managing partner relationships, driving revenue, and collaborating with sales and marketing teams.

Own the full enterprise sales cycle for an AI safety platform: prospect, qualify, demo, negotiate with technical and executive stakeholders, close net-new deals, provide feedback to product, and help build repeatable sales processes and playbooks.

Own technical direction and hands-on execution for major products and systems. Design scalable, reliable architectures across backend, frontend, APIs, databases, and infrastructure; write code; lead architecture decisions; solve production issues; improve engineering quality, testing, security, and observability; and mentor engineers across teams.

Lead technical direction and hands-on execution for major products, systems, and engineering initiatives. Design scalable and reliable backend, frontend, API, database, and infrastructure solutions; write code; make architecture trade-offs; solve production problems; improve testing, security, observability, and development practices; and mentor engineers across teams.

Own the company’s security posture across product security, cloud security, detection and monitoring, incident response, vulnerability management, threat hunting, and security scanning. Build enterprise security features such as BYOK, SSO/SCIM, and SIEM-compatible audit logging. Manage customer security questionnaires, requirements, and technical discussions with CISOs while balancing security rigor with startup velocity.

Amentum seeks active eDV-cleared professionals for project management, programme delivery, PMO, systems engineering, enterprise architecture, business analysis, and transformation roles supporting UK national security programmes. Candidates will work in multidisciplinary teams on complex, highly secure government projects, engaging stakeholders and delivering outcomes across the project lifecycle. Roles are based in London, South West England, or Manchester, with at least four days per week on customer sites and possible programme-related travel.

Own the full sales cycle for mid-market accounts, driving adoption and expansion of Elastic’s search, AI, observability, and security solutions. Build territory plans, identify use cases, conduct discovery, manage complex sales cycles, negotiate contracts, and close deals. Partner with Solutions Architects, Customer Success, Marketing, and RevOps while forecasting accurately and positioning technical capabilities against measurable business outcomes.