Job description

We’re hiring a Full-Stack / Backend Engineer @ Sandra AI (Full-time – Paris, Station F)

At Sandra AI, we’re reinventing how car dealerships handle phone calls.

Every month, dealerships lose business because 30% of calls go unanswered and most leads don’t get followed up.

We’re building voice-first AI agents that pick up every call, qualify leads instantly, and book appointments on the spot — 24/7.

After joining Y Combinator, launching with dozens of dealerships in France and the US, and raising our first round, we’re now looking for a backend engineer to help us scale

You’ll work closely with the co-founders (ex-McKinsey, Bain, QuantumBlack) to ship fast, own core architecture decisions, and have a direct impact on a live product used by thousands of drivers.

What we’re looking for :

• Strong experience in backend development (Python / FastAPI preferred)

• Comfortable with cloud infrastructure & deployment (AWS / Docker)

• Solid engineering mindset: autonomy, reliability, and a taste for fast shipping

•Bonus: frontend experience

•Bonus²: passion for voice, AI, or the automotive space

Our stack:

• Python (FastAPI), PostgreSQL, AWS

• Real-time voice + AI infrastructure

Details:

• Full-time position based in Paris – Station F

• Start: ASAP

• Language: English and French fluency required

• Salary highly competitive

Why join now?

• Join us right after YC, with real traction and real users

• Have ownership over key tech decisions and roadmap

• Work on real-time AI in production, not just PoCs

• Help shape the future of voice AI in a massive, underserved industry

The essential criteria: solid experience in Python and FastAPI, real ease with the application side of the backend, and fluency in French and English.

Another non-negotiable point: be based in the Paris region and be able to come to the office at Station F (Paris).

This is a very important criterion, but an exception can be made if the profile is exceptional: at least 3 years' experience, ideally with a stint in a large group and a start-up.

Required profile