Cyber Security Jobs

• London
• Permanent

Hands-on security advisory role protecting pre-release film and series content across the production lifecycle, from editorial setup and Aspera transfers to cloud storage and on-set networking. Combines vendor security assessments, research into forensic watermarking and anti-generative-AI controls, and building AWS-based tooling and Python automation.

AWS · Aspera · Python

• London
• Director · manages people
• Permanent

Lead and grow a team of security engineers and incident managers, owning incident response processes, SLAs and metrics at AWS scale. Partner with service teams on prioritisation and remediation, drive automation and process improvements, and guide architectural and technical strategy across organisations.

AWS

• London
• Mid-level

Own the full software development lifecycle for distributed systems supporting threat disruption and legal response, building data pipelines that collect and expose threat intelligence for analysts and customers. Work primarily in Golang and TypeScript with Rust, Kafka, Redis, Kubernetes, Terraform and Postgres, collaborating with Threat Intelligence, Trust & Safety, Legal and Product teams, plus on-call rotations and mentoring.

Golang · TypeScript · Rust +7

• 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
• Mid-level
• Permanent

Resolves complex identity and access management issues, helping customers adopt security products and align configurations with current standards. Identifies case trends, drives automation for bulk remediations, and acts as a technical lead and mentor, with occasional on-call duties.

AWS

• London
• Mid-level
• Permanent

Builds and operates AWS services that detect and automatically mitigate cybersecurity threats across Amazon's infrastructure at massive scale. Works with security engineers and data scientists on low-latency, big-data architectures using Lambda, Kinesis and DynamoDB, with shared ownership of operational excellence and on-call rotation.

AWS · AWS Lambda · Amazon Kinesis +1

• London
• Permanent

Join a Security Operations Centre to build detections for suspicious and malicious behaviour, respond to security incidents, and engineer automation and AI-driven solutions that improve team efficiency. You'll collaborate with data scientists, software engineers and security experts to protect AWS infrastructure and UK customers at massive scale.

AWS

• London
• Senior
• Permanent

Builds and manages services that detect and automate mitigation of cybersecurity threats across Amazon's infrastructure, working with data scientists and software engineers. The role also supports UK customer security programs covering personnel security, accreditations, assurance and training, with visibility to government agencies and senior leadership.

AWS

• London
• Senior
• Permanent

Builds greenfield security software that automates pentest workflows and surfaces critical security details about every Amazon application. Works with local and international security teams on scalable, mission-critical systems, rapidly prototyping tools that reduce manual security processes and protect customer data across Amazon's ecosystem.

AWS

• London
• Mid-level
• Permanent

Builds and operates automation platforms that onboard threat detection, remediate security risk and accelerate incident response across every AWS account. Day to day involves designing loosely specified features, writing well-tested Python and TypeScript on AWS services, instrumenting systems for operational excellence, and participating in an on-call rotation. The team runs foundational services at very high scale with a strong 'you build it, you run it' culture.

AWS

• London
• Mid-level
• Permanent

Builds and operates automation platforms that onboard threat detection, remediate security risk and accelerate incident response across every AWS account. The role spans designing loosely specified features, owning operational health through instrumentation and automation, and participating in an on-call rotation, using AWS services, Python and TypeScript at very high scale.

AWS

• Virtual Location - Uk
• Permanent

Adversarial security testing role on AWS's Continuous Security Testing team, turning threat intelligence and scanner signals into testable hypotheses against live production services. Combines hands-on penetration testing with AI-augmented source code review, tracing chained attack paths and building lasting detections, canaries and fuzzers. Also involves testing agentic AI systems and mentoring engineers.

AWS

• 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

• 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
• US$215,000 – US$225,000 pa
• Lead

Lead research, design and evaluation of detection models identifying automated, fraudulent and malicious activity across Internet-scale traffic. Own the detection measurement framework for noisy or delayed ground truth, mentor others, and drive cross-functional detection strategy with ML, data and product teams.

Python · SQL