about 3 hours ago
London, United KingdomMid Level / Senior
H1B Sponsor
Responsibilities
- Design and build the sandboxing platform, client library, and API surface for secure code execution.
- Ensure strong isolation, security, and reproducibility of execution across user sessions and workloads.
- Optimize for cold-start latency, memory footprint, and resource utilization at scale.
- Drive down error rates through systematic debugging, monitoring, and proactive fixes.
- Partner closely with internal teams to understand their needs and build tooling that serves their use cases.
- Respond to incidents and production issues with urgency, conducting root cause analysis.
- Help develop and maintain a product roadmap for sandboxing.
- Lead architecture reviews and own projects end-to-end in cross-functional settings.
Requirements
- 4+ years of experience building high-performance systems software.
- Deep understanding of Linux internals, including process isolation and memory management.
- Experience with containerization and virtualization technologies like Docker and QEMU.
- Proficiency in a systems programming language such as Go, Rust, or C/C++.
- Strong focus on developer experience, including API design and documentation.
- Ability to work across infrastructure layers from kernel modules to orchestration frameworks.
- Strong debugging skills and ability to navigate performance/security tradeoffs.
- Comfort with ambiguity and ability to switch between incident work and product development.