Software Engineer, Sandboxing

Highlights

• Build the sandbox isolation layer powering every Claude code run and agent.
• Cut sandbox cold starts from seconds to milliseconds with snapshot restore.
• Scale untrusted agent workloads to vast concurrent sessions with fast isolation.

What they offer

• Competitive compensation and benefits
• Optional equity donation matching
• Generous vacation and parental leave
• Flexible working hours
• Lovely office space to collaborate with colleagues

Ideal candidate

Low-level systems builder who thrives at the kernel boundary and cares deeply about safe, fast isolation. You enjoy debugging complex systems and shipping reliable infrastructure for AI agents at scale.

Requirements

• Software engineering experience in Linux systems programming, kernel development, or another low-level area
• Strong programming skills in at least one systems language such as Rust, C, C++, or Go
• Working knowledge of virtualization or container isolation technologies such as KVM, QEMU, Firecracker, gVisor, or runc
• Understanding of Linux resource management, including namespaces, cgroups, scheduling, and memory management
• Experience profiling and debugging performance issues at the system level
• Ability to work in unfamiliar codebases and technical areas, and to ship practical solutions with measurable results
• Strong communication skills and a commitment to building safe, reliable systems