Founding Software Engineer

  • Paris
  • CDI
  • Date de début : 17 août 2026
  • Postuler

À propos

We're Ooak Data

The promise of AI agents is still unmet in complex, real-world business environments. Our mission is to make it possible for agents to reliably accomplish concrete and useful tasks.

That's why we're building Alexandria, the world's largest library of real-world business workflow datasets. We're backed by Y Combinator (S26).

Over the next 6 months, we'll acquire and anonymize 300+ full data ecosystems from real-world companies to become the leader in real-world business workflow data.

This summer, we're assembling a small, senior team to move extremely fast and cement our lead in company data.

🤝 Our values

  • Trust — the foundation of every relationship, internal and external. We extend it by default and value the ownership that comes with it.

  • Ambition — we commit and move fast, with tenacity and efficiency.

  • Collective — team first, low ego.

  • Kindness — at the heart of every interaction.

We're building a solid, aligned, and motivated team.

Our traction speaks for itself: we've signed contracts with some of the largest AI labs in the world, alongside recent partnerships with several smaller labs, all while being 100% bootstrapped. This summer, we're joining Y Combinator, which is accelerating everything.

Descriptif du poste

✅ Your missions

As a Software Engineer and a founding member of the tech team, you'll play a central role in how we design, build, and scale the platform that powers our datasets and RL environments. You'll report directly to Thomas (CTO & co-founder).

  • Design, build, and scale the web platform and internal tooling our team and partners use to ingest, process, and explore data.

  • Build robust back-end services and APIs powering our data pipelines and RL environments.

  • Craft clean, reactive front-end interfaces for data curation, annotation, and monitoring.

  • Define our technical standards and take an active part in the structuring architecture decisions (tech choices, design patterns, scalability, DevOps).

  • Work closely with the product and ML teams to scope and ship new features end to end.

  • Mentor and grow the future members of the tech team, building a strong software engineering culture at Ooak Data.

Profil recherché

🔍 Who we're looking for

  • 4+ years of experience in software engineering, ideally full-stack or back-end focused.

  • Strong coding experience in TypeScript and Python, with a plus for Rust.

  • Solid experience with modern web frameworks (React, SvelteKit, or equivalent) and Node.js.

  • Comfortable designing and operating APIs, relational databases (PostgreSQL), and micro-services.

  • Proven track record delivering projects in an agile, collaborative environment.

  • Genuine desire to mentor and grow more junior profiles over time.

  • Demonstrated ability to thrive in a demanding, fast-growing environment.

  • Excellent analytical skills, attention to detail, and strong prioritization.

  • Fluent English, mandatory (working language with our clients and the labs).

The extras that make the difference

  • Experience with GCP (or equivalent), Docker, and serverless technologies.

  • Experience with infrastructure as code (Terraform, CloudFormation).

  • Strong interest in data engineering, anonymization, and AI/RL environments.

🎁 Why join us

  • Entrepreneurial adventure, play a key role and live the early days of an ambitious company, right at the front line of the AI revolution.

  • Backed by Y Combinator, join just as we accelerate.

  • Founding impact, shape the company and its culture from day one.

  • Offices in central Paris + 1 to 2 days WFH.

  • Perks:

    • Alan health insurance (mutuelle)
    • 50% Navigo covered
    • unlimited GPT & Claude tokens

Process de recrutement

✏️ Recruitment process

We can move very fast.

  • A 30 min intro call with Grégoire (COO & co-founder)

  • A 30 min call with Thomas (CTO & co-founder)

  • A technical case study:

    • Async preparation
    • Debrief interview with Thomas
  • A final fit interview with the founding team

Informations complémentaires

  • Type de contrat : CDI
  • Date de début : 17 août 2026
  • Lieu : Paris
  • Niveau d'études : Bac +5 / Master
  • Expérience : > 4 ans
  • Télétravail ponctuel autorisé
  • Salaire : entre 55000€ et 80000€ / an