Applied AI Software Engineer - Defense

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. ABOUT THE ROLE Join Mistral AI’s Defense team to build software for defense institutions and industry. We are looking for an experienced software engineer with strong engineering fundamentals and a background in data engineering or transactional, analytical or distributed systems. You will help shape the architecture, write production code and own substantial software components, from design through deployment and operation. This role offers the scope and autonomy of a senior technical individual contributor in a small team. It is particularly suited to engineers operating at Senior or Staff level in demanding product engineering environments who want broad ownership and to stay deeply involved in implementation. WHAT YOU WILL DO - Design and build services for data ingestion, transformation, storage, querying and operational workflows. - Develop shared data models, APIs and SDKs that help engineers build applications on a consistent foundation. - Make authorization a core part of the architecture: define and enforce which users, applications and agents can access data or perform actions, with clear audit trails. - Solve problems involving data consistency, schema evolution, concurrency, performance and failure recovery across services and data systems. - Turn needs from our applie