Senior/Staff Applied Scientist/Research Engineer

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 a Senior/Staff Applied Scientist/Research Engineer on the Mistral AI research team, you will drive key research efforts and partner with clients to solve challenging problems in artificial intelligence. Your work will focus on building and applying advanced models across text, image, and speech, aiming to deliver real, measurable impact. Collaborating closely with internal and external teams in science, engineering, and product, you will play a central role in developing AI solutions with tangible results.

What You Will Do

• Run pre-training and post-training sessions, deploying state-of-the-art models across large GPU clusters.
• Generate, curate, and evaluate datasets for model development, ensuring high model performance.
• Build and refine tools and frameworks supporting data generation, training, and deployment.
• Collaborate with diverse teams to address complex challenges using deep learning agents and retrieval-augmented generation pipelines.
• Lead research projects and maintain clear communication lines with client research groups.
• Diagnose and resolve technical challenges in model development and deployment.
• Improve existing systems for performance, maintainability, and reliability.
• Ensure projects meet or exceed expected outcomes.

What We're Looking For

• Fluency in English with clear communication skills for technical and non-technical audiences
• Deep expertise in PyTorch or JAX
• Proven ability to independently contribute to large codebases and write robust Python code
• Experience driving research or engineering projects in personal, academic, or professional settings
• Collaborative approach and openness to feedback
• High initiative, ability to deliver without rigid direction
• Expertise in multiple modalities such as agents, multi-modality, robotics, diffusion, or time-series appreciated
• Advanced degree in a relevant field or equivalent experience valued

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.

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