Applied Scientist / Research Engineer (Internship)

About Mistral

Mistral AI believes in the power of AI to simplify tasks, save time, and enhance learning and creativity. Our technology integrates seamlessly into daily working life. We democratize AI through high-performance, optimized, open-source and cutting-edge models, products and solutions. Our AI platform is designed to meet enterprise needs, whether on-premises or in cloud environments. Our offerings include Le Chat, the AI assistant for life and work. 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 across France, the USA, the UK, Germany and Singapore. We are creative, low-ego and team-spirited. Join us to be part of a pioneering company shaping the future of AI. Together, we can make a meaningful impact. See more about our culture at https://mistral.ai/careers.

Role Summary

Mistral AI is seeking Applied Scientists Interns and Research Engineers Interns to drive innovative research and collaborate with clients on complex research projects. You will develop SOTA models across modalities such as text, image, and speech. By developing novel methods and research ideas, you will apply these models to a diverse set of use cases and domains. Working cross-functionally with external and internal science, engineering, and product teams, you will deliver high-impact AI solutions. This position is open for our local offices in Paris and London.

What you will do

• Run pre-training, post-training, and deployment of state-of-the-art models on clusters with thousands of GPUs. You will handle OOM errors and NCCL readiness.
• Generate and curate data for pre-training and post-training, conduct evaluations, and ensure the model’s performance meets expectations.
• Develop tools and frameworks to facilitate data generation, model training, evaluation, and deployment.
• Collaborate with cross-functional teams to tackle complex use cases using agents and RAG pipelines.
• Manage research projects and communications with client research teams.

About you

• Fluent in English with excellent communication skills; able to explain complex technical concepts to technical and non-technical audiences.
• Expert with PyTorch or JAX.
• Comfortable contributing to a large codebase and able to work independently with minimal guidance.
• Writes clean, readable, high-performance, fault-tolerant Python code.
• Self-motivated and results-oriented; capable of shipping without heavy management.
• Low-ego, collaborative, and eager to learn.
• Proven track record through personal projects, professional projects, or academic work.

It would be great if

• You are pursuing a PhD or master's degree in a relevant field (e.g., Mathematics, Physics, Machine Learning), but exceptional candidates from other backgrounds are encouraged to apply.
• You can commit to at least 3 months, ideally 6 months; candidates nearing completion of their studies are prioritized.
• You have diverse research experiences, such as working with agents, multimodality, robotics, diffusion models, or time-series analysis.
• You have contributed to a large codebase used by many (open source or industry).
• You have a track record of publications in top academic journals or conferences.
• You enjoy improving existing code by fixing typing issues, adding tests, and enhancing CI pipelines.
• You welcome applicants of all genders, backgrounds, and life experiences.

Benefits

• Competitive salary
• Daily lunch vouchers
• Monthly contribution to a Gympass subscription
• Monthly contribution to a mobility pass