Cyber Security Jobs

• Portugal - Field
• Senior

Builds customer-facing web experiences in React alongside product designers and managers, prototyping and iterating across devices and browsers to meet accessibility standards. Contributes to test automation and GitLab CI/CD pipelines, and mentors other engineers on refactoring and engineering practices within an agile team.

React · GitLab

• Cambridge
• Hybrid · 2 days in office
• Senior

Owns prototyping and development of new ideas to improve Darktrace's cybersecurity services, balancing creativity with time constraints. Collaborates with a cross-functional team of engineers, designers and technical strategists on rapid prototyping and structured platform development, advancing methods for defending against unknown cyber-attacks. Requires production-quality Python coding, with Docker and containerisation experience and an interest in malware forensics.

Docker

• United Kingdom - Field
• Senior

Senior individual contributor providing cross-team technical leadership for quality engineering across a multi-tenant SaaS platform. Defines automation architecture and risk-based quality strategies, builds reusable test frameworks, and embeds unit, integration, contract, API and end-to-end testing into CI/CD pipelines. Leads performance, scalability and resilience validation, including fault injection and chaos testing, while mentoring engineers and influencing release decisions.

Kubernetes · OAuth 2.0 · mTLS +4

• London
• Senior · manages people

Lead the Threat Application Services team within Cloudforce One, owning the Threat Events platform, external Threat Intel APIs, and backend systems that feed IOCs into WAF and Gateway for automated mitigation. Set architectural direction and operational excellence for distributed, high-latency-sensitive services, while hiring and mentoring engineers building agentic threat intelligence tools.

Cloudflare Workers · SQLite · D1 +4

• United Kingdom
• Remote
• Mid-level

Hands-on SRE role focused on CrowdStrike's Commercial Cloud, covering operational ownership of availability, latency, throughput, monitoring, incident response and capacity planning across thousands of bare metal servers and VMs. Involves building automation and tooling in C++, Java, Python or Go, working with monitoring stacks like Prometheus, Grafana and ELK, and joining a global on-call rotation.

CrowdStrike · ELK · Prometheus +15

• London
• £80,000 – £90,000 pa
• Senior

Do you have a background in Application Security, DevSecOps or Product Security, with hands-on experience embedding application security into the SDLC If so, this could be an opportunity worth considering.Join a well-established health research organisation and charity supporting large-scale medical…

• 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

• London
• Hybrid · 2–3 days in office
• £90,000 – £100,000 pa
• Senior

Owns and matures security operations across cloud, endpoint and SaaS environments, covering detection engineering, incident response, vulnerability management and AWS/GCP security posture. Over time shifts toward security engineering and architecture, designing scalable telemetry and detection platforms and embedding secure-by-design principles with engineering teams.

AWS · GCP · SIEM +7

• Cambridge
• On-site
• £80,000 – £95,000 pa
• Senior
• Permanent

Owns software security strategy, roadmap and architecture across a product portfolio, leading threat modelling, secure design and security requirements. Defines secure architecture patterns and controls, embeds security into development and CI/CD, and oversees vulnerability management, security testing and release assurance while providing technical leadership to engineering teams.

Embedded Linux · Android · CI/CD

• London
• Senior
• Permanent

Security Architect role shaping security across a cloud-native environment, working closely with Architecture, Engineering, Product and Operations teams. Focus areas include GCP security, Kubernetes, DevSecOps, application and API security, identity, resilience and compliance (PCI DSS, GDPR, ISO 27001, SOC 2). Strong commercial GCP and Kubernetes experience is essential.

GCP · Kubernetes · API Gateways +4

• 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

• Filton
• Hybrid
• £45,000 – £55,000 pa
• Senior

Join a defence and security organisation's Cyber Operations team to test security controls, validate SOC detection capabilities and uncover vulnerabilities before exploitation. You'll support Red Team exercises, conduct infrastructure and web application testing, produce risk reports and brief stakeholders, working alongside Threat Intelligence and Incident Response specialists.

Kali Linux · Parrot OS · Active Directory +7

• Cambridge
• Hybrid · 2 days in office
• Senior

Conducts independent and collaborative research into large language models, statistical methods and classical machine learning, prototyping ideas and implementing models into the wider software stack. Produces latency- and memory-optimised solutions for deployment on edge devices, working closely with software engineers and security analysts.

PyTorch · TensorFlow · scikit-learn +7

• London
• £124,000 – £186,000 pa
• Senior

Owns architectural direction for Mimecast's Email & Collaboration Security product line, spanning email threat detection, DMARC, data platforms and response capabilities. Works across product, engineering and the Architecture Leadership Team to define integration contracts, ADRs and NFR targets, with cost-per-outcome reasoning and daily AI tooling use.

AWS · Kafka · MCP +4

• London

The Application Security Consultant will act as a technical authority and trusted advisor to engineering and product teams, leading application security reviews, conducting various security assessments, and integrating security into the development lifecycle. The role involves working across internal IT and customer-facing products, promoting secure coding practices, and delivering security training.