Founding Engineer - AI Coding Agents

Small, YC-backed AI dev tools startup building the cloud infrastructure for running coding agents (Cursor, Claude Code, Codex) remotely. Backed by Y Combinator, Moonfire Ventures, and angels from OpenAI, Anthropic, a16z, General Catalyst and Cloudflare. You'd be the second engineer in, working directly with the founder across the full stack. What you'd be doing: Shipping core product features end to end, TypeScript and Svelte frontend, Go and Cloudflare Workers backendOwning entire areas of the product with minimal directionHelping set the engineering bar and architecture as the team scales from 2 to 10+Working daily, in person, alongside the founderWhat we're looking for: 1 to 5 years full stack experience, shipped production TypeScriptStartup or startup-like environment, not big tech or bankingA daily power user of AI coding tools, not someone learning to like themComfortable in London on-site five days a week, open to a future SF move £120K to £150K base, 1-2% equity. Ground floor, real ownership, fast pace. DM me or drop your CV if this sounds like you