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Code Behaviour Architect - London, Uk (Contract)

Remote, USA Full-time Posted 2026-06-16

Role Summary

The Product team conducts research, defines product behavior, and evaluates our models to guide the behavior of models behind le Chat and APIs. The team is responsible for improving the overall quality of both our models and products - defining and delivering the new frontier.

As a Code Behavior Architect, you’ll be at the forefront of shaping LLM system behavior to align to our product goals. We’re looking for people who have experience with technical writing, Prosumer Products, and are experts in model evaluation, prompt engineering, and policy writing. Join us if you are passionate about tackling cutting-edge, open-ended research challenges and transforming your findings into real-world products.

Key Responsibilities

Conduct research around new search capabilities, conversational design, and tool calling, leveraging and developing tools such as synthetic data, context distillation, and model training to shape the product and model behaviour of le Chat, our APIs, and our models.

Build evaluations and pipelines to facilitate the development and research in this area.

Integrate your research into the final products of Mistral AI.

Qualifications & Profile

• You h

ave a deep understanding of Code, Coding Copilots, and Conversational Design.

• You h

ave prior knowledge in training and optimising model behaviour and building evaluations.

• You a

re willing to dive into prompt generations and unit tests.

• You t

hrive in dynamic and technically complex environments.

• You h

ave a track record of delivering innovative, out-of-the-box solutions to address real-world constraints.

Additional Information

About Mistral

At Mistral AI, our mission is to make AI ubiquitous and open. We are passionate about bridging the gap between technology and businesses of all sizes. We are a leading innovator in the field of open-source large language models.

Our advanced LLM solutions can be seamlessly deployed on any cloud, allowing for optimized integration and robust performance. Developers are using our API via la Plateforme to build incredible AI-first applications powered by our models that can understand and generate natural language text and code. We are multilingual at our core. We released le Chat, as a demonstrator of our models.

We are a tight-knit, nimble team dedicated to bringing our cutting-edge AI technology to the world. Our teams are distributed between France, UK and USA. We are creative, low-ego, team-spirited, and have been passionate about AI for years. We hire people who thrive in competitive environments, because they find them more fun to work in. We hire passionate women and men from all over the world.

Mistral AI participates in the E-Verify program

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