At Mistral AI, we build high-performance, open, and efficient AI systems designed to power the next generation of applications. Our infrastructure combines large-scale distributed systems, cloud platforms, and HPC environments to support cutting-edge research and production workloads.

We are a collaborative, low-ego, and highly technical team, operating across Europe, the US, and beyond. As we scale rapidly, we are building the foundational infrastructure to support thousands of nodes and petabyte-scale systems.

Join us to be part of a pioneering company shaping the future of AI. Together, we can make a meaningful impact.

About the Role

We are looking for Systems Engineers / System Administrators to help design, operate, and scale the infrastructure behind Mistral’s AI platforms.

This is a hands-on, hybrid role combining:

Systems administration (operating and troubleshooting large-scale Linux environments)

Systems engineering (automation, scalability, and performance improvements)

You’ll work closely with infrastructure, HPC, and research teams to ensure our clusters and platforms run reliably at scale.

What You’ll Work On

Core Systems Operations

Operate and maintain large-scale Linux environments (bare metal, clusters, cloud)

Monitor system health, troubleshoot incidents, and ensure high availability

Support production and research workloads across multiple environments

Scaling Infrastructure

Help scale clusters toward hundreds to thousands of nodes

Work on systems handling petabyte-scale storage

Improve performance, reliability, and resource utilisation

Automation & Engineering

Automate operational tasks using tools like Python, Bash, Ansible, or Terraform

Improve deployment, provisioning, and system lifecycle management

Contribute to system design and architecture decisions

Cross-Functional Collaboration

Work closely with:

HPC / infrastructure teams

Platform / DevOps engineers

Research teams

Act as a bridge between users and infrastructure

What We’re Looking For

Must-have

Strong Linux systems administration experience (core requirement)

Experience working in large-scale environments:

HPC clusters or cloud infrastructure

Experience with Job schedulers (e.g. Slurm)

Solid troubleshooting skills across systems, hardware, and networks

Nice-to-have (any of these)

Containers / orchestration (e.g. Kubernetes)

Storage systems (e.g. Ceph, Lustre, NFS)

Networking fundamentals (Ethernet; InfiniBand is a plus)

Infrastructure as Code / automation tooling

GPU or AI/ML experience

Profile We Value

Pragmatic problem solver who can operate in fast-scaling environments

Comfortable working across multiple domains (“Swiss army knife” mindset)

Able to go deep in one area while learning others

Low-ego, collaborative, and hands-on

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Your primary responsibilities will include working with our salesforce to design an innovative product roadmap, as well as the actual products, to meet new or future client demand. You will also be responsible for helping to design compelling marketing campaigns around these products to maximise engagement with our client base.

In addition, you will oversee the full spectrum of product launch, including onboarding into our systems, to ensure risks generated by these products are well controlled by our organisation. You will liaise with our relevant trading teams to incorporate feedback, leverage our strengths, and plan out necessary future capabilities.

Collaboration with our internal tech teams will be essential to streamlining the trade volumes resulting from our equity derivatives and QIS businesses.

This is a full-time position, Monday to Friday, 40 hours per week, with a salary range of $250,000.00 to $260,000.00 per year.

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A significant portion of backend logic is shared across services, and this role will help define, maintain, and scale that foundation.

You will own and improve internal schema and code generation tooling that ensures consistency and correctness across services.

You will work on and extend our custom job scheduler, improving reliability, observability, and execution guarantees for distributed workloads.

You will contribute to safely execute large-scale concurrent and distributed operations.

You will play a key role in defining and maintaining API standards across teams, ensuring performance, backward compatibility, and clear evolution strategies.

You will collaborate closely with Product and various Engineering teams to design systems that are reliable, scalable, and maintainable over time.

The Core Systems team is responsible for the foundational backend infrastructure that powers Weights & Biases within CoreWeave.

Much of the platform's critical logic is shared across services, and this role sits at the center of that foundation.

You will work on the systems that other engineers build upon , from execution frameworks and schedulers to schema tooling and API standards.

This is a high-leverage role focused on durability, scalability, and long-term maintainability.

The systems you design and evolve will directly impact reliability, developer velocity, and the ability of the platform to scale with growing workloads.

You'll collaborate across teams to ensure that shared backend abstractions remain clean, performant, and consistent as we continue to expand our adoption of technologies like GraphQL and gRPC.

If you enjoy owning deep technical infrastructure, shaping engineering standards, and building systems that other engineers depend on every day, this role offers meaningful scope and impact.

You will be surrounded by some of the best talent in the industry, who will want to learn from you, too.

Come join us!

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