Cyber Security Jobs

• Bucharest, Romania
• Remote
• Senior
• Permanent

Owns major components of the Windows kernel-mode Falcon sensor, architecting and building anti-virus and EDR features that span file system, memory, process and networking subsystems. Leads projects end to end, from design through unit and component testing, while mentoring and collaborating with a distributed, cross-platform team.

Windows · Mac · Linux +1

• 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

• Slough
• Remote
• £24,000 – £45,000 pa
• Entry level

A traineeship combining self-paced online training in CompTIA, Microsoft and Cisco courses with live-lab practical work, leading to a guaranteed IT Technician placement and later a cyber security role. Candidates study from home with a tutor, sit CompTIA A+ exams, and must complete two years in an IT Technician post before progressing into cyber security.

CompTIA A+ · CompTIA · Microsoft +1

• London
• Remote
• £24,000 – £45,000 pa
• Entry level

A traineeship combining online CompTIA, Microsoft and Cisco training with Livelabs practical work, leading to a guaranteed IT Technician placement and later a cyber security role. Candidates study from home at their own pace, sit CompTIA A+ exams, and must complete two years in an IT Technician post before progressing into cyber security.

CompTIA A+ · CompTIA · Microsoft +1

• London
• Hybrid · 3 days in office
• Senior
• Permanent

Owns a core area of the document verification platform, setting strategy and roadmap for identity document checks used in onboarding and account opening. Works with Engineering, AI/ML, Data Science, Design, Growth and Compliance to improve verification accuracy, conversion, operational efficiency and fraud prevention, using experimentation and analytics to prioritise investments.

NFC · eIDs · Digital Wallets

• Cambridge
• Hybrid · 3 days in office
• Senior
• Permanent

Leads the design and delivery of complex features in a cryptographic security product, working hands-on across embedded software, platform components, client tools and APIs. Sets technical direction, mentors engineers and supports system-level architecture decisions on availability, latency and data models. Hybrid role in Cambridge, three days onsite.

C · Python

• London
• Mid-level

Builds and maintains a Chromium-based browser engine, remote rendering and streaming tech, and distributed services that run browser sessions across a global network. Day-to-day work spans C++ browser code, Go/Rust/TypeScript services, debugging across browser processes and Linux hosts, and improving latency and reliability, with production on-call.

Chromium · Cloudflare Workers · Nomad +3

• 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

• London
• Lead

Security lead for an AI engineering team's products and platform, owning security reviews, threat modelling and sign-off from design through production. Covers AI/LLM risks like prompt injection, CVE remediation, scanning tooling in CI/CD, pen testing and incident response, reporting directly to the CIO.

Azure · GCP · GitHub Actions +7

• Cardiff
• £24,000 – £45,000 pa
• Entry level

A traineeship combining online, accredited IT support training with hands-on Livelabs practice and CompTIA A+ exams, followed by placement as an IT Technician. After two years' experience and further networking training, participants progress into a Network Engineer role with partner IT companies.

CompTIA A+ · CompTIA · Microsoft +1