Senior Full Stack Engineer - Agent Experience

Own end-to-end slices of the agent experience — UI, API and the backend services behind them, not just the frontend of someone else's endpoint.

Ship agent-facing features into production continuously and stay on them: reliability, latency, incidents, observability.

Turn ambiguous product bets into working software in days, then decide from usage data whether to double down or delete it.

Work directly with our AI and science engineers on how tools, context and streaming behave in the product.

5+ years building and operating full-stack products in production.

Strong TypeScript/React (we run Next.js) and genuine backend depth in Python (FastAPI) — you can design a schema and debug a slow query, not only call an API.

Product instinct: you argue about the shape of the feature, not only the ticket.

Comfort with high change rates and incomplete specs. Agentic products do not hold still.

Stack: Next.js/React/TypeScript, Python/FastAPI, Postgres/Supabase, AWS (CDK, CloudFront, ECS, Lambda, Cognito), containerised agent sandboxes.