Role OverviewThis is a deeply technical player-coach opportunity for an experienced infrastructure engineer to lead the Windows sandbox platform while remaining highly hands-on with the underlying systems. The team is tackling a largely unsolved infrastructure challenge: making isolated Windows virtual machines behave like serverless compute, with fast startup, snapshotting, pausing, forking, and efficient multi-tenant operation.
What You Will Do
Own the architecture and delivery of the company's Windows sandbox runtime. Build and operate Windows guest environments on top of a KVM-based virtualization stack. Optimize Windows VM boot, provisioning, and login times to create an instant-start sandbox experience.
Why It Might Be a Fit
Ideal Background: 8+ years of professional systems, infrastructure, virtualization, or platform engineering experience. 2+ years of experience leading engineers responsible for production systems. Deep experience operating Windows infrastructure at scale outside of primarily Microsoft-native environments.
Requirements
- 8+ years of professional systems, infrastructure, virtualization, or platform engineering experience
- 2+ years of experience leading engineers responsible for production systems
- Deep experience operating Windows infrastructure at scale outside of primarily Microsoft-native environments
- Hands-on experience running Windows guests using KVM/QEMU
- Strong experience with virtio drivers and Windows VM image automation
- Deep understanding of Windows internals, including the boot process, services, registry, and system configuration
- Experience automating Windows infrastructure using PowerShell, WinRM, unattended provisioning, or similar technologies
- Strong systems programming ability with Go, Rust, C, or C++, or significant C#/PowerShell expertise combined with a systems programming language
- Experience designing reliable, multi-tenant infrastructure with strong isolation requirements
- High ownership mindset with the ability to take infrastructure from architecture through production operations
Benefits
- Competitive base salary
- Equity
- Full-time position reporting directly to the CTO
- Location options in San Francisco or Croatia
- Lead an initial pod of two senior engineers alongside a dedicated Product Manager
- Player-coach structure where hands-on engineering remains the majority of the role
- Opportunity to build a novel serverless Windows infrastructure platform specifically designed for AI agents
- Significant ownership over architecture, reliability, infrastructure economics, licensing strategy, team development, and the long-term technical direction of the Windows sandbox platform
]]>