Data 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.
That's why we're building
Alexandria,
the world's largest library of real-world business workflow datasets.
Over the next 6 months, we'll acquire and anonymize
300+ full data ecosystems
from real-world companies. This will allow us to
become the leader of real business workflow data
be in the best position to launch our own
data research lab in early 2027
, enabling new services that help companies around the world automate their workflows with AI
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)
6 FTEs: 3 ML engineer and 3 ops + 5 freelances
✅ Your missions
As a
Data Engineer
and a
founding member of the tech team
, you'll play a central role in how we design, structure, and scale the data foundations behind our products. You'll report directly to Thomas (CTO & co-founder).
Design, build, and scale
our data ingestion, transformation, and structuring pipelines at scale.
Contribute across every stage of our data platform:
the
anonymization
pipeline (combining algorithmic approaches with human verification) to build digital twins of companies.
the multi-modal data
enrichment & curation
pipeline.
the datasets feeding our
reinforcement learning (RL) environments
.
Ensure
data quality, lineage, versioning, and observability
across the whole stack.
Define our technical standards
and take an active part in the structuring architecture decisions (tech choices, design patterns, scalability, DataOps).
Work closely with the product, ML, and business teams to scope and ship new data projects.
Mentor and grow
the future members of the tech team, building a strong data engineering culture at Ooak Data.
---
🔍 Who we're looking for
5+ years of experience
in data engineering or data-intensive software development.
Strong coding experience
in
Python
and
SQL
, with a plus for
Rust
or
TypeScript
.
Expertise building ETL/ELT pipelines
and orchestration (Airflow, Dagster, dbt, or equivalent).
Experience with
data warehouses and lakes
(BigQuery, Snowflake, or equivalent) and streaming tools (Pub/Sub, Kafka).
DataOps
know-how: versioning, monitoring, data quality and testing.
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), Modal or GPU cluster and serverless technologies.
Experience with
infrastructure as code
(Terraform, CloudFormation).
Strong interest in
data anonymization, multi-modality, and 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
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Visa: US citizen/visa only.