Salary: £100,000 - 100,000 per year Requirements: 5-10 years in full-stack engineering (backend-leaning) Proven track record building and shipping AI products end-to-end — especially agentic systems Experience in early-stage startups or possess a founder-level ownership mindset Strong Python or TypeScript skills (async Python is essential) Hands-on experience with LLMs and modern AI tooling Deep understanding of async/await, coroutines, httpx, AsyncOpenAI, and production-grade error handling in async systems Experience with cloud infrastructure (Kubernetes, serverless, distributed systems) Ability to move fast and take ownership Comfortable with ambiguity and building from first principles Passionate about shipping real products — not just prototypes Responsibilities: Build and ship core product features across a modern stack (Python, TypeScript, cloud, event-driven systems) Own problems end-to-end from customer discovery through to production deployment Work directly with users to turn messy, real-world workflows into elegant AI-powered solutions Balance speed vs scalability, knowing when to prototype and when to harden systems Set the standard for engineering excellence across reliability, testing, and security Technologies: AI Backend Cloud Kubernetes Python Serverless TypeScript Security More: We are a top VC backed Series A startup based in London, focused on building AI voice agents that transform how trades businesses operate. As a founding engineer, you will not just ship features; youll shape the product, define the architecture, and play a key role in how AI interacts with real-world customers daily. This role offers high ownership, direct customer impact, and the chance to build something foundational from the ground up, a hallmark of early-stage AI startups. We provide a competitive salary package and equity. last updated 13 week of 2026