Xapien is looking for a talented individual to join their team in Greater London. You will have the opportunity to shape and improve parts of the Xapien pipeline, focusing on LLM research and refining system performance.

The ideal candidate is fluent in Claude Code, has strong numerical reasoning, and has experience in shipping production-level LLM systems. This position offers a collaborative environment and significant ownership of your work.

Benefits include private health insurance, unlimited holidays, and a professional development fund.