Software Engineer Senior

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.
Over the next 6 months, we'll acquire and anonymize
300+ full data ecosystems
from real-world companies to become the leader of real business workflow data
This summer we need to build our elite squad to move extremely fast and confirm our leading position on 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, we 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.
The job offer
📍 Paris (city center), on-site with 1 to 2 days WFH
🕐 Start: as soon as you are available
💼 Contract: full-time (CDI), open to freelancing for the summer
👥 Team:
3 co-founders (Pierre-Louis, CEO; Grégoire, CPO & COO; Thomas, CTO)
3 FTEs: 1 ML engineer and 2 ops.
✅ 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.
---
🔍 Who we're looking for
5+ 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)
Unlimited GPT & Claude tokens
50% Navigo covered
Visa: US citizen/visa only.