Principal Software Engineer
Founding Backend Engineer
FinTech | UK | Remote-first | £80K - £120K
An early-stage fintech is building a greenfield platform in the tax & compliance space and is hiring a Founding Backend Engineer to help shape both the backend and AI-driven systems.
What you'll do:
- Build scalable backend services and APIs
- Develop production-grade LLM systems (agentic workflows, RAG, evals)
- Work on data-heavy, real-world problems in a regulated domain
- Own features end-to-end and influence architecture
Tech:
- Python, Go, or Node.js
- Hands-on experience with agentic systems, RAG, LLM workflows, and evaluations (beyond prompting)
- Cloud infrastructure experience
If you want real ownership and to build AI systems that actually ship, apply for more details.