Security Engineer - Detection & Response | Leading Global Investment Group

Techfellow Limited • london, london • Posted June 11, 2026

About the Role

(Up to c. £350k Comp Package | Hybrid Working - 4 Days in Office)


The full job description covers all associated skills, previous experience, and any qualifications that applicants are expected to have.

Role Overview


We’re representing a high-calibre quantitative investment firm building a new security function alongside a completely refreshed technology environment. This is a rare opportunity to shape Detection & Response properly from day one, rather than inherit a noisy SIEM, half-owned tooling and legacy processes. The role suits a deeply technical security engineer who understands systems at a low level, has strong opinions on telemetry and detection architecture, and can turn those opinions into production-grade capability. You’ll work closely with senior security leadership to design the data, tooling, automation and response foundations that protect a fast-moving investment platform...


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