Senior Research Software Engineer (Sandbox Platform) - Distributed Systems & Virtualization

mistral • United Kingdom

Remote

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AI Summary

Design, build, and operate a scalable sandboxing platform for untrusted code across Kubernetes clusters, focusing on performance, security, and cross-cluster networking. Collaborate with AI researchers to translate their needs into platform features while writing production-grade systems code in Rust and Python. Join a small, high-ownership team prioritizing reliability and low-latency optimizations.

Key Highlights

Build and operate a distributed sandboxing platform for untrusted code at massive scale (millions of concurrent sandboxes)

Leverage Firecracker for low-level virtualization, fast startup, and efficient scheduling without hardware blocking

Own cross-cluster networking, security boundaries, and observability for suspicious activity detection

Key Responsibilities

Design and build a sandbox runtime using Firecracker for fast startup, snapshotting, and efficient scheduling

Develop and operate a scalable sandboxing platform across multiple Kubernetes clusters (bare metal and hyperscalers)

Optimize performance and latency to support millions of concurrent sandboxes

Write robust, well-tested systems code in Rust and Python with a focus on reliability and observability

Own cross-cluster networking, security boundaries, and isolation guarantees

Monitor and detect suspicious activity across the platform

Collaborate with researchers and ML engineers to translate their needs into platform features

Review code, CI/CD pipelines, and observability tools for the platform

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Technical Skills Required

Distributed Systems Kubernetes Rust

Benefits & Perks

Healthcare coverage

Parental leave

Retirement plans

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Nice to Have

Experience with Firecracker or microVMs

Product-mindedness with understanding of synthetic data generation or RL training

GPU cluster, CUDA, or ML workloads experience

Prior SRE or platform engineering experience at scale

Open-source contributions or widely used internal tools

Job Description

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.

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