Senior Applied AI Engineer – Build & Optimize LLM Pipelines

Xapien is seeking a hands-on AI engineer/researcher in Greater London to own parts of the pipeline end-to-end—from LLM research agents to report generation. You will design evals, optimize for accuracy, speed and cost, and drive improvements.

You’ll thrive in a fast-moving startup, ship production systems, and shape what comes next with high ownership. The role focuses on real customer value, prompt engineering, and building trust through robust, scalable AI solutions.

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