Software Engineer - Paris (Internship)

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. Role summary We are seeking passionate engineering students to join our engineering teams for an internship in our Paris office. Depending on your skills and interests, you will be embedded in one of our teams, from software engineering, data, AI engineering to Site Reliability, and contribute to the systems and tooling powering AI Studio, Vibe, and more. You will learn the specifics of building AI software at scale, and your work will directly impact the developer and user experience of products used by millions. We welcome students from all backgrounds and universities who are eager to learn, collaborate and ship impactful products. We will prioritize candidates who can join us full time in Paris after a successful internship. What you will do Engineering at Mistral covers a wide range of roles - software engineering, data, AI engineering, site reliability, and more. Whichever team you join, you may find yourself:

• Developing user-facing internal and external applications built on Mistral AI models , chat assistants, search engines, document answering, and the many experiences unlocked by LLMs
• Designing, building and shipping end-to-end features across the stack (Python, TypeScript), from API to interface
• Creating smooth, high-quality user experiences for both developer-facing and end-user-facing products
• Instrumenting our products with developer-facing tools: dashboards, evaluation interfaces, and analytics pipelines
• Turning product and usage data into insights that shape what the team builds next
• Contributing to the reliability, scalability and performance of our platform (Kubernetes, CI/CD, Terraform…)
• Improving monitoring, alerting and observability of systems serving millions of users
• Writing clean, maintainable and well-documented code, and participating in code reviews
• Working closely with product managers, designers, senior engineers and researchers
• Learning from experienced mentors while owning real problems end-to-end

About you

• You are an engineering student (Master's level or final-year equivalent) in Computer Science, Software Engineering, Data Science, or a related field
• Strong foundations in at least one area: full-stack development (Python, TypeScript, JavaScript), data engineering, or infrastructure (Kubernetes, CI/CD)
• Appetite for constructing AI-based solutions - chat APIs, embedding APIs, and everything LLMs unlock
• Ability to adapt to new technologies very quickly, and to thrive in a fast-paced, fast-changing environment
• Curiosity, ownership mindset, and a collaborative, low-ego attitude

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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