Security Engineer Jobs in London, UK 🇬🇧

The sample titles point to several distinct specialisms sitting under the security engineer umbrella. Cloud security roles focus on hardening infrastructure across major cloud platforms, while application security positions centre on protecting production systems, conducting threat modelling, and embedding secure coding standards into engineering workflows. Detection and response roles, such as the Writer detection and response position, involve building automated detection pipelines, leading incident response, and hunting threats across distributed environments including GPU clusters. A growing subset of postings is explicitly AI-oriented: the Isomorphic Labs AI safety role asks candidates to design risk frameworks for adversarial machine-learning threats, and the Anthropic Fellows programme is a structured research fellowship in empirical AI safety. The Anthropic security architect posting sits closer to a technical advisory function, working with European financial institutions on regulatory compliance. Across the sample, responsibilities span security architecture, forensic investigation, DevSecOps practices, and direct engagement with engineering and research teams.

The large majority of postings on this page specify onsite working in London, with a smaller portion listed as hybrid. No postings in this set are advertised as fully remote. Where hybrid is stated, the precise split of days in-office is not always specified in the posting. Candidates should check individual listings for exact arrangements, as several postings do not elaborate beyond the mode label, and office location details vary by employer.