| Location | San Francisco, CA |
Location: San Francisco
Type: Full-time
Reports to: Engineering Lead, Windows Sandboxes
The role
You will make Windows behave like a serverless primitive: boot fast, snapshot instantly, fork on demand, and hand control to an AI agent over an API. This is unglamorous, high-leverage systems work at the intersection of Linux virtualization and Windows internals, and very few people in the world can do it well.
What You\'ll Do
Build the Windows guest stack on KVM/QEMU: virtio drivers, guest agents, image pipelines, unattended provisioning
Attack Windows boot and login latency; build snapshot/restore and fork that actually work for Windows guests
Build the control plane surfaces agents use: input injection, display streaming, file transfer, process and app lifecycle APIs
Automate image builds and updates: patching, software installation, sysprep, golden image management at fleet scale
Instrument and improve density, cost, and reliability of Windows hosts
Debug across the boundary: hypervisor on one side, Windows kernel and services on the other
What We\'re Looking For
5+ years of systems engineering in production
Real experience with Windows guests on Linux hypervisors (KVM/QEMU + virtio) or equivalent depth in Windows virtualization internals
Strong Windows internals: boot, services, session management, registry, PowerShell/WinRM automation
Solid systems language skills (Go, Rust, C/C++, or C# where it counts)
Ownership mentality; you run what you build
Nice to have
Remote display protocol experience (RDP stack, Spice, WebRTC-based streaming)