Principal Software Engineer

Lead Software Engineer

£75,000 to £85,000 + Private Healthcare + Enhanced Pension

Southampton (Hybrid, 4 days per week in the office)

Are you a senior software engineer looking to take end to end ownership of a complex, real-time distributed platform that integrates directly with mission‑critical hardware used in security and critical infrastructure environments?

This is a principal‑level technical role within a specialist engineering business developing a real‑world platform that ingests, processes and surfaces live telemetry from radiation detection systems deployed in highly sensitive locations. The software underpins real‑time monitoring, alerting and operational decision‑making, where performance, reliability and security are non‑negotiable.

You will lead the technical direction of a TypeScript‑based microservices platform, remaining hands‑on across backend services while also owning a large Angular enterprise applica...