AI Infrastructure Engineer (Sandbox Platform)

Company

Scale AI develops reliable AI systems, high-quality training data, and full-stack technologies for AI applications used by enterprises, governments, and leading technology companies.

What you will do

• Design and build a secure sandboxing platform, client library, and API surface for code execution in containerized and virtualized environments.
• Ensure strong isolation, security, and reproducibility across user sessions and workloads.
• Optimize cold-start latency, memory footprint, and resource utilization at scale.
• Debug production issues, monitor systems, respond to incidents, and implement preventive fixes through root cause analysis.
• Partner with internal platform users to understand needs, debug issues, and develop supporting tooling.
• Lead architecture reviews and own projects from design through deployment while contributing to the sandboxing product roadmap.

Requirements

• 4+ years of experience building high-performance systems software and maintaining libraries, SDKs, or developer-facing APIs.
• Deep understanding of Linux internals, including process isolation, memory management, cgroups, and namespaces.
• Experience with containerization and virtualization technologies such as Docker, Firecracker, gVisor, QEMU, or Kata Containers.
• Proficiency in a systems programming language such as Go, Rust, or C/C++.
• Experience with API design, error propagation, documentation, and developer experience for well-crafted libraries.
• Ability to work across infrastructure layers, from kernel modules to orchestration frameworks such as Kubernetes, and navigate production performance and security tradeoffs.

Nice to have

• Founder or early-engineer experience at an infrastructure-focused startup with end-to-end product ownership.
• Familiarity with LLM agents and agent frameworks such as OpenHands, Agent2Agent, or MCP.
• Experience running secure workloads in multi-tenant or untrusted environments, including FaaS, CI sandboxes, or remote notebooks.
• Exposure to snapshotting and restore technologies such as CRIU, VM snapshots, or overlayfs.
• Open-source contributions to systems or developer-tools projects and production on-call experience.

Culture & Benefits

• Benefits may include comprehensive health, dental, and vision coverage.
• Retirement benefits, a learning and development stipend, and generous paid time off are available for eligible roles.
• Eligible roles may include equity compensation and a commuter stipend.
• Inclusive and equal-opportunity workplace with reasonable accommodation support for applicants with disabilities.