# Senior Security Software Engineer, Sandbox Platforms at Roblox

- Company: Roblox
- What the company does: Roblox is a global platform where millions of people gather together every day to imagine, create, and share experiences with each other in immersive, user-generated 3D worlds. Backed by Greylock, a16z and Index.
- Company website: https://about.roblox.com/
- Type: Startups
- Level: Senior
- Location: San Mateo, CA, United States
- Work setup: On-site
- Posted: 2026-09-15
- Apply by: 2026-10-30
- Apply: https://careers.roblox.com/jobs/8198167?gh_jid=8198167
- Page: https://www.1752.vc/careers/jobs/roblox-senior-security-software-engineer-sandbox-platforms/

## About the role

We build the isolation layers that contain untrusted and semi-trusted code. You will design, build, and harden process sandboxes across one or more of Linux, macOS, and Windows, the last line of defense when something inside goes wrong. This is a deep systems role for someone who thinks in terms of attack surface, threat models, and the exact boundary between trusted and untrusted.

## What they're looking for

- Deep, hands-on knowledge of the OS security model on at least one of Linux, macOS, or Windows, and the sandboxing primitives that platform provides
- Strong grasp of attack surface analysis: how sandboxes are escaped and how to shrink the ways in
- Fluency in the boundary between sandbox and host (brokers, IPC, syscall filtering, privilege separation) and how to design a minimal, well-audited interface
- Systems programming in C, C++, or Rust, comfort at the syscall and kernel-interface level
- Sound judgment on tradeoffs: knowing when tighter isolation is worth the cost and when it isn't
- A security mindset: you default to least privilege and distrust every input crossing the boundary

Tags: Engineering