Founding Engineer

The role

We are hiring a Founding Engineer to increase our engineering velocity and own the architecture of our agent orchestration layer.

You will work directly with the founders, founding engineers, and customers. You will speak with users every week and own launches from the initial problem through production.

What you will work on

• Agent state, memory, context, tool use, planning, and human-in-the-loop flows.
• Tool reliability, evaluation, observability, latency, and cost.
• You will own the ingestion and indexing of 10M+ social videos per month into our vector store, optimizing for sub-second retrieval.
• Systems that apply Kuli's video intelligence within each customer's brand context.
• Internal tooling and automation that increase the output of a small team.

Who we are looking for

• 3+ years of experience as a software engineer.
• Strong backend fundamentals and experience owning production systems.
• Hands-on experience with agentic frameworks.
• Evidence of shipping software used by real people.
• Comfortable moving quickly without saying sorry
• Comfortable speaking with customers and owning launches.
• Has built things from the ground up, independently or as an early employee.

Our stack includes Python, FastAPI, LangGraph, PostgreSQL, Supabase, Redis, Azure, TypeScript, and React. We use models from OpenAI, Anthropic, and Google.

We work primarily in person in Paris, with flexible arrangements when needed. English is our working language. Three-quarters of the team are YC founders.

How to apply

Send a short note covering:

• The hardest thing you have built, what you personally owned, and how you got through the hardest part.
• Links to something you built + short voice note or video