Platform Engineer for AI Orchestration & Research Tools

Mistral.ai; Paris; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Healthcare coverage

Parental leave

Relocation support

Wellness programs

Meal and transportation allowances

Job summary

Mistral is seeking a Research Engineer to join the Orchestral team, building the agentic platform used to train and evaluate models. You will own significant pieces end to end, from design to production, focusing on the library, tooling, abstractions and rollout engine.

You will work on long-running tasks, subagents and RL features, ensuring reliable workloads at scale and improving data and job flow through scheduling, routing and request handling for researchers as users.

Qualifications

• Experience building and debugging distributed systems at scale.
• Strong Python skills and solid software-design instincts: testing, code review, CI/CD.
• A builder mindset: you have constructed systems from the ground up, not just operated polished ones.
• Track record in small teams running complex systems at scale — finance, crypto or ad tech.
• Self-starter, low-ego and collaborative, with a product mindset toward your users.
• Curiosity about ML and RL — learning is encouraged.

Responsibilities

• Design and build the core of the Orchestral platform: the library, abstractions and tooling researchers use to train and evaluate models.
• Build and evolve the rollout engine, shipping new capabilities such as long-running tasks and subagents.
• Run Orchestral as a production system: keep training and evaluation workloads reliable at scale.
• Improve how data and jobs flow through the platform as usage grows — scheduling, routing and request handling.
• Treat researchers as your users: understand their workflows and turn recurring needs into robust tooling.
• Raise the bar on engineering quality across the platform: testing, code review, CI/CD, observability and documentation.
• Contribute to open-source rollout-engine and agent-infrastructure projects where it benefits the platform.

Skills

Distributed systems

Python

Software design

Testing

CI/CD

Code review

Collaboration

Tools

Ray

Job description

Mistral is seeking a Research Engineer to join the Orchestral team, building the agentic platform used to train and evaluate models. You will own significant pieces end to end, from design to production, focusing on the library, tooling, abstractions and rollout engine.

You will work on long-running tasks, subagents and RL features, ensuring reliable workloads at scale and improving data and job flow through scheduling, routing and request handling for researchers as users.