Senior Full Stack Engineer (Java / Python)
Contract Length - 6 months
Location - London (2 days onsite)
We are hiring a Senior Full Stack Engineer for a high-priority, ASAP-start contract role with a leading UK tech platform.
This is a hands-on senior engineering position within an established team building scalable, modern full stack systems.
The Role
You'll be a senior individual contributor working across backend and frontend systems, helping shape technical direction and confidently engaging with stakeholders to influence engineering decisions.
The core stack is Java-first, with increasing importance on Python-based services (including orchestration, agents, and modern AI/LLM integrations), alongside a strong React frontend.
This is not a leadership/management role, but you must be able to operate at senior level, challenge decisions, and drive engineering quality.
What you'll bring
We're looking for a strong Full Stack Engineer with recent commercial experience across:
* Java + Spring Boot (core requirement, must be recent – ideally last 12–24 months)
* Python (recent hands-on experience essential – services, orchestration, or AI/LLM work highly valued)
* React (strong frontend experience is critical)
* Experience building and delivering end-to-end full stack applications (frontend, backend, APIs)
Plus exposure to:
* Cloud platforms (AWS preferred; Azure/GCP also fine)
* Containers (Docker, Kubernetes – Kubernetes preferred)
* Data systems (Postgres / NoSQL; bonus for vector DBs, embeddings, semantic search)
* Agile delivery environments
* Engineering best practices (TDD, SOLID, XP principles)
Other Key Skills
* Strong communication skills and stakeholder management
* Ability to challenge technical decisions constructively
* Senior-level ownership and accountability (IC role, not managerial)
* Reliable, collaborative, and comfortable in fast-moving environments
Important notes
* Must have recent Java AND Python experience (last 1–2 years ideal)
* Frontend (React) experience is essential – full stack capability required
* Candidates must be comfortable working onsite in London twice per week (Soho)
Please note - candidates must have full right to work in the UK. This is a fast moving requirement, and we are prioritising candidates who are immediately available or on short notice.