SOFTWARE ENGINEER SENIOR

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