I'm working with a fast-growing, VC-backed AI startup that is transforming a document-heavy, high-value workflow for B2B teams. The product is already live with paying customers who report dramatic time savings, and the company is entering a major growth phase.
The team is small and highly focused, and this is a chance to join early, own meaningful parts of the product, and help shape both the architecture and the product direction.
What you'll be doing
- Building core platform and AI features end to end, from polished React frontends to robust Python backend services
- Designing and improving multi-step agentic workflows, including context engineering and agent evaluation
- Making key decisions on infrastructure, data models and system design as the platform scales
- Championing engineering quality through testing, code review, CI/CD and monitoring
- Working directly with product, design and customer-facing teams to ship features customers love
What they're looking for
- 4 - 8+ years of full-stack experience with React, TypeScript, Node and Python
- Hands-on experience building AI products, ideally with LangChain, LangGraph and LangSmith or similar tooling
- Experience with context engineering and evaluating agents
- Comfort owning features from design through to deployment
- Previous startup experience
- Genuine autonomy: you'll largely decide what you work on
- A fast track into senior responsibilities
- Hard, interesting AI problems in a product with proven demand
- Equity in a company with strong momentum
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Senior Full Stack AI Engineer in England employer: trg.
As a Lead Data Engineer at our innovative AI startup in London, you'll be at the forefront of building cutting-edge data architecture from scratch, with direct access to the founders and significant influence over the product roadmap. We foster a dynamic work culture that values creativity and ownership, offering meaningful equity and the opportunity to shape the future of a disruptive technology in a rapidly evolving market. Join us for a rewarding career where your contributions will directly impact our success and growth.
