Research Engineer, Machine Learning - Paris/London/Zurich/Warsaw

 

 

The team spans Platform (shared infra & clean code) and Embedded (inside research squads). Engineers can move along the research↔production spectrum as needs or interests evolve.

 

As a Research Engineer – ML track, you’ll build and optimise the large-scale learning systems that power our open-weight models. Working hand-in-hand with Research Scientists, you’ll either join:

 

- Platform RE Team: Enhance the shared training framework, data pipelines and cluster tooling used by every team; or

- Embedded RE Team: Sit inside a research squad (Alignment, Pre-training, Multimodal, Safety …) and turn fresh ideas into repeatable, scalable code.

 

 

 

• Accelerate researchers by taking on the heavy parts of large-scale ML pipelines and building robust tools.

• Interface cutting-edge research with production: integrate checkpoints, streamline evaluation, and expose APIs.

• Conduct experiments on the latest deep-learning techniques (sparsified 70 B + runs, distributed training on thousands of GPUs).

• Design, implement and benchmark ML algorithms; write clear, efficient code in Python.

• Deliver prototypes that become production-grade components for Le Chat and our enterprise API.

 

 

• Master’s or PhD in Computer Science (or equivalent proven track record).

• 4 + years working on large-scale ML codebases.

• Hands-on with PyTorch, JAX or TensorFlow; comfortable with distributed training (DeepSpeed / FSDP / SLURM / K8s).

• Experience in deep learning, NLP or LLMs; bonus for CUDA or data-pipeline chops.

• Strong software-design instincts: testing, code review, CI/CD.

• Self-starter, low-ego, collaborative.

 

 

France

💰 Competitive cash salary and equity

🥕 Food: Daily lunch vouchers

🥎 Sport: Monthly contribution to a Gympass subscription

🚴 Transportation: Monthly contribution to a mobility pass

🧑‍⚕️ Health: Full health insurance for you and your family

🍼 Parental: Generous parental leave policy

🌎 Visa sponsorship

 

UK

💰 Competitive cash salary and equity

🚑 Insurance

🚴 Transportation: Reimburse office parking charges, or  £90 per month for public transport

🥎 Sport:  £90 per month reimbursement for gym membership

🥕 Meal voucher: £200 monthly allowance for meals

💰 Pension plan: SmartPension (percentages are 5% Employee & 3% Employer)