Backend Software Engineer – Paris

About the role

Mistral AI is looking for passionate Backend Software Engineers to help build the core systems behind its AI Studio, Le Chat, and Mistral Code products. You will design, develop, and maintain high‑performance backend services that power millions of users and developers worldwide.

Key responsibilities

• Design, develop, and maintain scalable, robust backend features and APIs using modern frameworks.
• Ensure high performance, reliability, and security across distributed systems.
• Contribute to components such as authentication, billing, AI tooling, observability, connectors, and developer experience.
• Design efficient system architectures that support rapid product growth.
• Collaborate with infrastructure teams on deployment, monitoring, and performance optimization.
• Write clean, maintainable code, participate in code reviews, and uphold technical standards.
• Work closely with product managers, front‑end engineers, designers, and data/AI engineers to deliver end‑to‑end features.
• Tackle complex engineering challenges, including distributed systems and AI product integration.

Required profile

• Passionate software engineers eager to learn and ship impactful products.
• Open to candidates of any experience level, from fresh graduates to senior engineers.
• Strong collaborative mindset and ability to work in cross‑functional teams.

Required skills

• Backend development using modern frameworks.
• Design and implementation of APIs.
• Experience with distributed systems.
• Knowledge of system architecture and scalability.
• Familiarity with observability tools and AI/LLM integration.

What we offer

• Opportunity to work on cutting‑edge AI products at a fast‑growing company.
• Collaborative, low‑ego team culture across multiple international locations.
• Exposure to both on‑premises and cloud environments.