Founding AI Platform Engineer — Stealth AI Start-up

£120,000-£160,000 + Equity + Benefits

London – Hybrid

I’m working with a AI start-up (backed by tier-1 European VCs) building a decision platform for high-stakes environments — helping teams navigate uncertainty and make better calls, faster.

What you’ll actually be doing:

• Building core product features across backend, frontend & workflow systems.
• Turning fast-moving prototypes into reliable, reusable product surfaces.
• Designing interfaces that make complex AI outputs feel clear & trustworthy.
• Building the platform foundations — auth, permissions, APIs, observability.
• Working directly with the founding team — fast decisions, no bureaucracy.

What we’re looking for:

• 5+ years building production software.
• Strong full-stack chops (Python/FastAPI + React/TypeScript or equivalent).
• Solid SQL & data modelling instincts — comfortable in data-heavy B2B products.
• Bonus: experience with agentic/LLM-powered products, tool use, evals, guardrails.
• Bonus: API integrations (MCP, webhooks, OAuth) + cloud deployment (AWS).
• Direct AI/ML experience isn’t a hard requirement — strong product engineering judgment matters more.

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