France

Model Behavior Architect- Function Calling, Paris

Model Behavior Architect- Function Calling, Paris
Description
About Mistral At Mistral AI, we believe in the power of AI to simplify tasks, save time, and enhance learning and creativity. Our technology integrates seamlessly into daily work. We democratize AI through high‑performance, optimized, open‑source models and solutions. Our platform meets enterprise and personal needs, featuring Le Chat, La Plateforme, Mistral Code, and Mistral Compute. Our team operates across France, USA, UK, Germany, and Singapore, driven by a collaborative, low‑ego culture.

About the Role As a Model Behavior Architect on the Function Calling team, you define and measure how large language models use tools, invoke functions, and orchestrate complex agentic workflows.

What You Will Do

Interact with models to identify where function‑calling and tool use behaviour can be improved

Gather internal and external feedback on tool‑calling behaviour to scope areas for improvement

Design and implement evals, data guidelines, data generation, and synthetic tool environments and APIs

Identify and fix edge‑case behaviours, such as malformed arguments, hallucinated functions, and incorrect tool selection, through rigorous testing

Develop robust evaluation pipelines for the function‑calling capabilities of model candidates

Work collaboratively with AI scientists

About You

Deep understanding of API design, structured outputs, and schema specification (e.g., JSON Schema); or engineering and code behavior; or LLM agents with reasoning, planning, and multi‑step tool use

Experience in training and optimising model behaviour

Expertise building robust evaluations

Thrives in dynamic and technically complex environments

Track record of delivering innovative, out‑of‑the‑box solutions to address real‑world constraints

What We Offer

Competitive salary and equity

Health insurance

Transportation allowance

Sport allowance

Meal vouchers

Generous parental leave policy

Visa sponsorship

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Informations supplémentaires sur l’annonce

Model Behavior Architect- Function Calling est visible sur Locanto dans la catégorie Paris Design, Conception.

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