Software Engineer (Golang), Sandbox

Mistral; Paris; A distancia; EUR 120.000 - 180.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Healthcare coverage

Relocation support

Meal and transportation allowances

Wellness programs

Descripción de la vacante

Mistral is building sovereign AI infrastructure and software tooling to support frontier models and compute for enterprises across regulated environments. The team focuses on secure, isolated runtimes and scalable orchestration to run AI agents and reinforcement-learning workloads at fleet scale.

You will design and ship the runtime primitives that empower customers to build and deploy AI software on our platform, collaborating closely with product and engineering teams to deliver robust,

Formación

• Deep Linux internals: namespaces, cgroups, seccomp, virtualization, etc.
• Strong backend/infrastructure engineering experience.
• Proven ability to collaborate with product, design and business teams.

Responsabilidades

• Build the isolation layer: microVMs or containers, namespaces, cgroups, seccomp, snapshot and restore.
• Own security boundary; ensure safe execution of customer-provided code.
• Scale to fleets: manage creation latency, density, and lifecycle for thousands of environments.
• Write Go and own architecture decisions.
• Partner with Product Managers to turn frontier research into shippable primitives.

Conocimientos

Linux internals

Backend / infrastructure

Collaboration with product/design

Performance optimization

Team player

Herramientas

Go

Descripción del empleo

About Mistral
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.

About Mistral
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.
THE TEAM
Mistral is building a sovereign AI cloud for Europe. Our customers in finance, healthcare, and the public sector run frontier models on European-jurisdiction infrastructure, and the Cloud Platform team builds the systems that make that possible - compute orchestration, Kubernetes, bare metal, storage, networking, and the datacenter fleet that runs it all.
We run it all on our own metal, our own network, our own datacenters - which means when something breaks, the fix is ours to write.
European Compute Units let enterprises commit to multi-year capacity on that infrastructure, and we are scaling toward a gigawatt of compute across Europe by 2030. You will design and ship the layer every sovereign AI deployment depends on.
THE ROLE
AI agents don't run in browsers. They run in sandboxes - and you will build ours.
We build secure, isolated, network-controlled environments with snapshotting primitives, designed for AI agents and reinforcement-learning workloads. An RL training run doesn't need one environment; it needs thousands, created and destroyed every second. An agent needs to be sandboxed from the world while still feeling fast enough to be useful. That tension - airtight isolation, at fleet scale, at low latency - is the product.
Your customers are the people building the next generation of AI software on our infrastructure; the primitives you ship become the runtime their agents live in.
What You Will Do

• Build the isolation layer: microVMs or containers, namespaces, cgroups, seccomp, snapshot and restore.
• Own the security boundary. Customers run code they didn't write and can't fully trust - your systems make that safe.
• Scale to fleets: creation latency, density, and lifecycle management for thousands of concurrent environments.
• Write Go and own the architecture and the hardest implementation decisions.
• Partner with Product Managers to turn frontier research needs into shippable primitives.
  

What We're Looking For

• Deep Linux internals: namespaces, cgroups, seccomp, virtualization - ideally microVMs of the Firecracker class.
• You have shipped production systems in Go. Not dabbled. Shipped.
• You understand network isolation at the packet level - not just firewall rules.
• Performance instincts: you know what a syscall costs, and you have the profiles to prove you've cared.
• 5+ years building backend or infrastructure systems.
• You have partnered with product, design, and business teams to ship software that reached real users.
• A low-ego, team-first mindset. We care less about your exact domain and more about whether you are the kind of technical force other engineers want to work alongside.
  

What we offer
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.
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