Cyber Security Jobs

• France - Field (Onfido)
• Senior

Owns planning, coordinating and executing test and quality activities within a cross-functional identity verification product team, covering web, mobile, backend and ML-powered journeys. Builds maintainable automated test frameworks and suites, mentors colleagues, and leads test engineering initiatives across teams. Combines automation with exploratory testing and works with TypeScript, Ruby, Python, Playwright, Cypress, Selenium and CI/CD pipelines.

Playwright · Cypress · Selenium +7

• Portugal - Field
• Hybrid · 3 days in office
• Senior

Builds and maintains the iOS SDK for document capture, working on camera capabilities, on-device image processing and machine learning to help end users capture quality identity documents. Collaborates with designers, product managers and engineers in an agile team, using Swift and contributing to test automation and CI/CD pipelines.

iOS SDK · React Native · Flutter +3

• Virtual Location - Uk
• Senior
• Permanent

Leads complex security testing engagements end-to-end across interconnected AWS microservice architectures, performing penetration testing and AI-augmented source code review. Investigates high-consequence risk hypotheses to documented conclusions, builds reusable mechanisms like fuzzers and detection rules, and mentors engineers while setting the team's peer-review bar.

AWS · Agentic AI

• Reading
• Remote
• Senior
• Permanent

Owns major components of the Falcon endpoint sensor, a Windows kernel-mode driver that observes system activity, detects malicious behaviour and provides on-box prevention plus telemetry to the cloud. Work spans architecture, design and delivery across file system, memory, process and networking subsystems, with shared components across Windows, Mac and Linux. Involves leading projects, mentoring and collaborating with distributed teams.

Windows · Mac · Linux +2

• Aarhus, Denmark
• Remote
• Senior
• Permanent

Owns major components of the Windows kernel-mode endpoint sensor, architecting and building anti-virus and EDR features that cut across file system, memory, process and networking subsystems. Works on cross-platform deliverables with shared components across Windows, Mac and Linux, leading projects from design through delivery and demo.

Windows · Mac · Linux +1

• Blackburn
• Hybrid · 1–2 days in office
• £60,000 – £65,000 pa
• Senior

Hands-on senior role owning the reliability, security and improvement of a mixed Linux and Microsoft infrastructure estate. Day to day covers server administration, Ansible automation, Docker and Kubernetes container platforms, MySQL/Galera and MSSQL databases, CI/CD pipelines, monitoring, patching and disaster recovery, working closely with the Software Development Team, IT Operations and third-party partners.

Ansible · Docker · CRI-O +7

• London
• Hybrid · 2–3 days in office
• £90,000 – £120,000 pa
• Senior

Full-stack product engineering role in a cross-functional squad, owning mid-to-large initiatives end to end and shaping product strategy with designers and PMs. Stack centres on Go, AWS and Vue.js, with a strong emphasis on system design, testing, automation and mentoring other engineers.

Go · AWS · Vue.js +7

• Lifton
• £57,000 pa

Supporting the control systems behind food processing, filling and packaging equipment at the Ambrosia Creamery, diagnosing PLC, HMI, SCADA and industrial network faults and driving continuous improvement projects. The site standard is Siemens, with S5 and S7 PLCs and TIA Portal, and the role also covers commissioning, FAT/SAT, obsolescence planning and OT cyber security.

Siemens S5 · Siemens S7 · TIA Portal +2

• Benfleet

Supports the compliance and integrity of control and information systems at a gas-fired power station, covering security strategy, policies, risk assessments, audits and incident response. Works with the Cyber Security Manager on OT security, ISA/IEC 62443 standards and regulatory frameworks, plus Management of Change and RCA investigations.

ISA/IEC 62443 · NIS Directive · NCSC Cyber Assessment Framework +1

• Fleet
• Hybrid
• Mid-level

Owns day-to-day security alerting, investigations and incident response across a cloud-native microservice platform and internal IT estate, directing a Platform Ops team on remediation. Manages SIEM, endpoint and Microsoft 365 security tooling, vulnerability management, IAM and penetration testing engagements, while maintaining ISO 27001 documentation and UK GDPR compliance.

AWS · Kubernetes · EKS +5

• London
• On-site
• Lead · manages people
• Permanent

Lead product cybersecurity assurance across the HMND 01 humanoid robot platforms, defining security requirements, threat modelling and risk artefacts for safety-critical electromechanical systems. Own TARA, security management plans and remediation actions, drive compliance with IEC 62443, the EU Machinery Regulation and the Cyber Resilience Act, and build a PSIRT process while guiding a cross-functional security team.

CAN bus · Ethernet · KinetIQ +4

• London
• Hybrid · 2 days in office
• Senior

Design, build and operate distributed systems behind Cloudflare's Application Security products (WAF, Page Shield, API Shield) at internet scale, using Go or Rust and devops tooling like Kubernetes and Kafka. The role includes reviewing RFCs and code, on-call shifts, and mentoring other engineers.

Kubernetes · Salt · Kafka +7

• Birmingham
• Hybrid
• Mid-level
• Permanent

Champion SRE best practices across engineering, platform and service operations teams, implementing SLOs, SLIs and error budgets for critical services. Build observability through monitoring, logging, tracing and alerting, automate operational tasks, and support incident response and resilience testing. Also involves AIOps adoption and embedding reliability into delivery pipelines.

AIOps

• London
• Senior

Builds and operates Cloudflare's Chromium-based browser isolation engine, working across C++, Rust, Go and TypeScript on remote rendering, streaming and distributed session services. The role spans systems programming, distributed systems and security, leading multi-component initiatives and on-call incident response.

Chromium · Cloudflare Workers · Nomad +3

• Reading
• On-site
• £30,000 – £35,000 pa
• Mid-level

Provide first and second line support remotely and onsite for a managed service provider, owning tickets in Autotask and troubleshooting Windows, Microsoft 365, printers and connectivity. Alongside helpdesk duties you assist with client installations, school projects and wireless networking work, developing skills in Intune, Ekahau surveys and 3CX telephony.

Autotask · IT Glue · Intune +7