Senior Applied AI Engineer

Our momentum so far

Customers in a diverse range of industries, with particular growth in wealth management, financial services and supply chain onboarding.

Demand accelerating beyond our UK headquarters, across multiple continents with new customers in the Middle East, Asia, and Oceania.

The work

You'll own parts of the Xapien pipeline end-to-end — LLM research agents, entity resolution, report generation. Prototype, evaluate, ship, measure, improve.

• Build a system optimised for accuracy, speed and cost

• Design evals that measure what matters, driving meaningful improvements

• Dig into the failures and fix them at the root

• Shape and ship what's next - high ownership

We use Claude Code by default and rarely write code ourselves. The craft is in careful prompting, tight loops, sharp evals, and spotting when the agent's quietly wrong.

You

• Fluent in Claude Code, Codex, or similar agentic tooling.

• Strong numerical reasoning. Top-uni CS / maths / engineering / science, or equivalent in what you've built.

• Shipped production LLM systems — RAG, prompting, agents. The kind customers pay for.

• You've worked somewhere fast — startup or strong tech team — and make good calls on imperfect information.

• You know software engineering: you’ve launched systems, responded to incidents, designed for failure

• High-agency. You scope problems, own solutions, and help decide what we build next.

• Focused on real answers for real customers. Theory's a tool, not the point.

• Good to work with. Small team — it matters.

Here’s our promise to you

• We are going to work with you - to build a rewarding and fulfilling career with the opportunities, challenges and resources you need to do you your best work.

• We succeed together- you will own a meaningful part of the business through our employee shares & equity programme.

• Private health insurance to keep you in tip-top condition.

• Life Insurance – let's hope nobody ever needs this!

• Unlimited holidays – yes, it really is uncapped – take the time you need, when you need it.

• Everyone is learning, developing and challenging themselves so we have a £1k professional development fund per year if you want to learn new skills, even new things outside of work.

• Most importantly of all, we will work with you, to help you realise your fullest potential, always.