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nao Labs (YC X25)

Software Engineer (YC Startup)

On site

Paris, France

Senior

Full Time

15-01-2026

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Skills

Python TypeScript GitHub Sales react node.js Analytics Spring OpenAI

Job Specifications

Founding software engineer — Build the future of data teams experience.

Location: Paris 11, France

Hello, we're nao Labs

We are building an open-source AI agent for data analytics.

We are an early stage start-up with 2 cofounders - we joined Y Combinator Spring 2025 batch and STATION F and are now based in Paris 11.

We already have a first product - AI IDE for data people - used by 100+ data teams. We are now rolling out a new product - the open source analytics agent. So we’re looking for a founding engineer to help us build it!

We are a cofounding team with 18+ years experience in data/AI:

Claire, our CEO, was Data Scientist at BCG Gamma, then head of data at sunday
Christophe, our CTO, was staff Data Engineer at FreeNow, then worked as a freelance for Blablacar, Qonto. He then created his own blog and data community, blef.fr

We're looking for

As a founding engineer, you'll join us to inventing a new, better way to work on data with AI.

You will be a fit if...

You’ve already built and shipped a real product end-to-end
You have hands-on experience building agentic systems
You have strong product instinct: you care about UX & design quality
You want to join an early-stage startup and build tech and team from scratch
You’re ready to work independently, ship fast and 80/20, make decisions, and own outcomes.
As we will be a small team of 4 people, we like to have everyone bring the most they can to the product. So we’ll work as a team on tech/product roadmap, and you’ll be fully included in the sales/business strategy as well.

You will

Own and build across the entire stack — frontend, backend, and AI features
Design and ship core systems powering nao, including agentic workflows for data work and intuitive UIs for chat-based analytics
Shape product roadmap by turning user feedback and company goals into technical and product decisions.
Work in a small, fast-moving team, collaborating daily with the founders to invent how data teams use AI to work better and faster.
Build the future of nao tech team with us

You are

Entrepreneurial — ready to build, ship, and iterate fast
Autonomous and curious — ready to learn constantly on the newest AI technologies
Passionate for software engineering and interested in building open source tools.

Tech

The product uses these main technologies:

Front: React, Typescript

Back: node.js, Python

Agentic system: Vercel, OpenAI, Anthropic

Apply

Interested? Send us your CV and a brief note about why you’re interested in this role to claire@getnao.io. Bonus points if you include a link to your GitHub or showcase a project you’ve worked on!

Start Date: Flexible

Compensation: competitive salary + early equity

Location: Mainly on-site in our Paris 11 office. Remote available.

Join us at nao Labs and help shape the future of data work. Let’s build something incredible together!

About the Company

We are creating the best AI code editing experience for data workers, removing the need of context switching between tools while still working on your computer, in your IDE. Know more