Principal Software Engineer (Agent Infrastructure)

Location: Based at the Roblox headquarters in San Mateo, California; onsite Tuesday, Wednesday, and Thursday, with optional office presence Monday and Friday.

Salary: $278,530–$345,040 USD annual base pay, plus equity eligibility and benefits.

Company

Roblox builds tools and infrastructure for immersive 3D digital experiences created by a global community of developers and creators.

What you will do

• Own the design and implementation of core agent infrastructure for internal and external customers.
• Build reliable systems that keep long-running autonomous agents operating through deployments, restarts, and outages.
• Run untrusted code in secure sandboxes, protect credentials, and control network access.
• Define platform SLOs, observability, and reliability standards.
• Partner with Security, Engineering Efficiency, and Infrastructure teams on platform architecture.
• Mentor senior engineers, lead design reviews, and help advance agent-driven development.

Requirements

• 8+ years of experience building and operating backend, distributed, or infrastructure systems in production at scale.
• Deep expertise in workflow orchestration, scalable backend infrastructure, agentic runtimes, or secure sandboxing and access.
• Production coding experience with Go, Python, Rust, or a similar language.
• Experience running autonomous agents against real systems and understanding their failure modes.
• Bachelor’s degree or equivalent experience in Computer Science, Computer Engineering, or a related technical field.

Nice to have

• Experience with sandboxing, container isolation, gVisor, Firecracker, microVMs, Kubernetes hardening, or network segmentation.
• Experience with Temporal, AWS, self-hosted models, Kubernetes, GitOps, or Argo CD.
• Open-source contributions or experience building a product with real user traction.

Culture & Benefits

• Work with an experienced engineering team on agent infrastructure already serving users at scale.
• Collaborate across Security, Infrastructure, Engineering Efficiency, and the Foundation AI organization.
• Full-time employees are eligible for equity compensation and company benefits.
• Roblox provides equal employment opportunities and reasonable recruiting accommodations.