Applied AI, Frontier Engineering, Staff

Paris-based AI company building frontier models, AI applications, developer tools, and compute infrastructure for enterprise and public-sector deployments.

Series DRecently funded13 current maintainers13 active leads5 new active leads15 lead step-downs
Paris, France
About Mistral AI

Mistral AI develops open-weight and commercial language models and provides a full-stack AI platform spanning agents, application development, custom-model training, APIs, and AI cloud infrastructure.

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Skills

Candidate Availability

Required and preferred rules are kept separate and reflect the wording in the original posting.

About the Role

You will build AI systems from prototype to production, designing agent architecture covering orchestration, tool use, memory and retrieval. You will build across the stack, embed security into agents, and create evaluation loops that catch failures and quality drift.

Requirements

  • 5+ years building production software
  • At least one agentic or GenAI system shipped to production and run after launch
  • Proficient in NodeJS or Python and confident with TypeScript and React/NextJS
  • Hands-on depth in agent design and evaluation
  • Ability to work autonomously
  • Clear communication and fluent English
  • Product judgment

Responsibilities

  • Build AI systems end to end from prototype to production
  • Design agent architecture: orchestration, tool use, memory, retrieval
  • Build across the stack from backend services and APIs to interfaces
  • Turn customer solutions into reusable patterns and platforms
  • Design systems for throughput, latency, cost and failure recovery
  • Build security into agents: permissions, sandboxing, prompt-injection defenses and audit trails
  • Build evaluation loops with task-level evals and tracing
  • Work with researchers, engineers and customer-facing teams

Benefits

  • Healthcare coverage
  • Parental leave
  • Retirement plans
  • Relocation support
  • Wellness programs
  • Meal and transportation allowances