Senior AI Engineer for UK AI-startup

The project. A UK startup founded by experienced founders with successful startups behind them, now closing its funding round. Their AI agents interview a company's employees about how they work, map the organisation's processes, and then build and run agents that automate them. That includes the infrastructure, integrations with Slack and Teams, and dashboards showing hours saved and the return on AI.

The team. It's small and very advanced in AI-driven development (about 100 PRs a week with agents). It has a senior CTO and a fast junior engineer, and needs a strong senior engineer in between.

What you'll do. This is a hands-on role, not management. You'll own the quality of the LLM product (evals, prompts, conversation quality, guardrails), improve the AI dev process, and design parts of the system (RAG, memory, agent security).

Must-haves:

You've shipped production LLM products, ideally conversational or agentic

Hands-on experience with evals

Strong system design for LLM systems

Fluent in agentic development

Good English

Full focus on this project

Nice to have:

Microsoft Teams / SharePoint / Graph API integrations

Voice agents

Knowledge graphs

Experience with GDPR, SOC 2 or the EU AI Act

Early-stage startup experience

We offer:

15 paid day-offs per year.

10 UK/UA holidays.

Flexible schedule and fully remote work from anywhere with reliable overlap.

Minimal bureaucracy, high authonomy and trust, fast decisions.