Applied Scientist / Research Engineer (Internship)

Location

Paris

Employment Type

Full time

Department

Solutions

About Mistral

Mistral provides full-stack AI solutions: from frontier models to developer tools, applications, and compute. We partner with enterprises tackling the hardest problems - across high-stakes industries like finance, manufacturing, defense, healthcare, and the public sector - co-creating customized AI systems that they can run on their terms.

We are a dynamic, collaborative team passionate about AI and its potential to transform society. Our diverse workforce thrives in competitive environments and is committed to driving innovation. Our teams are distributed between Europe, North America, Asia and the Middle East. We are creative, low-ego and team-spirited.

The Role

As an Applied Scientist / Research Engineer Intern on the Mistral AI team, you will help drive new research and work closely with clients on complex technical challenges. The team is responsible for developing advanced models spanning different modalities such as text, image, and speech. Your work will have direct impact as you collaborate cross-functionally with science, engineering, and product teams to deliver practical AI solutions. This role is based in our Paris or London offices.

What You Will Do

Run pre-training, post-training, and deploy advanced models on GPU clusters

Troubleshoot technical issues, including OOM errors and NCCL communication

Generate and curate data for all stages of model development and evaluation

Build tools and frameworks for data generation, model training, evaluation, and deployment

Collaborate with internal and external teams to apply AI to diverse use cases, including agent and retrieval-augmented generation pipelines

Manage communications and research project workflows with client teams

Ensure models regularly meet or exceed performance expectations

What We're Looking For

Fluent English and clear communication skills with technical and non-technical audiences

Expertise in PyTorch or JAX

Confidence working independently with large codebases

Proficient in writing clean, efficient, and reliable Python code

Initiative to take ownership and deliver without heavy guidance

Collaborative attitude, low-ego, and willingness to keep learning

Demonstrated success through academic, professional, or personal technical projects

Experience or strong interest in areas like agents, multi-modality, robotics, diffusion models, or time-series analysis

What We Offer

We offer a comprehensive benefits package designed to support your well-being, growth, and work-life balance. Benefits vary by country and may include healthcare coverage, parental leave, retirement plans, relocation support, wellness programs, meal and transportation allowances, and other location-specific perks.

For the most up-to-date details on benefits available in your location, please refer to our Benefits page.