Research Engineer
Mistral AI
Research Engineer
Mistral AI
Open-weight LLMs and enterprise AI deployment
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.
Evaluation is how we decide which models, checkpoints and recipes ship. As a Research Engineer on the Eval Platform team, you will build the infrastructure every science team relies on to measure model quality, and make it reliable, reproducible and fast.
You don't need to have designed benchmarks before. You do need to care about what a score means, and about when a difference between two runs is real.
Build systems that keep eval results reproducible and comparable over time, as models, benchmarks and code evolve.
Run evaluations at scale across our GPU clusters, from model serving to scoring.
Make eval results easy to access, explore and trust, through APIs and dashboards that researchers use every day.
Catch broken or noisy evals before they mislead research decisions.
Support evaluation of agentic, multi-turn and tool-using models.
Work closely with researchers to turn new evaluation needs into robust, shared tooling.
Master's or PhD in Computer Science, or equivalent experience.
4+ years building production-grade software, ideally large-scale ML codebases or distributed systems.
Excellent Python and strong software-design instincts: testing, code review, CI/CD.
Experience running workloads on GPU clusters (Slurm, Kubernetes, Ray or similar).
Familiarity with LLM inference and evaluation.
A product mindset: researchers are your users.
Self-starter, low-ego, collaborative.
Experience building or maintaining evaluation harnesses or benchmarks.
Hands-on experience with inference engines such as vLLM or SGLang.
Experience with agentic or RL environments.
Statistics for experimentation: variance estimation, significance testing.
Open-source contributions to ML tooling.
We offer a comprehensive benefits package designed to support your well-being, growth, and work-life balance. Benefits vary by country and may include healthcare coverage, parental leave, retirement plans, relocation support, wellness programs, meal and transportation allowances, and other location-specific perks.
For the most up-to-date details on benefits available in your location, please refer to our Benefits page.
Your privacy matters to us. You can learn more about how we handle your personal data in our Applicant Privacy Policy.
Open-weight LLMs and enterprise AI deployment
Mistral AI builds open-weight large language models and the tools to run them, along with inference infrastructure and enterprise products that let organizations deploy AI with control over data residency, customization, and the underlying stack. Its platform provides open-model architectures and a deployment stack for inference, governance, and integration that can run on‑premises or in the cloud. This openness and modular stack differentiate it from single-vendor hyperscalers by prioritizing data locality and flexibility. The company aims to enable reliable, customizable AI deployment at scale for businesses and public-sector customers across many countries.
Explore more opportunities at Mistral AI