Kernel
Browser Security Engineer
$225K–$250K
San Francisco +3 · On-site · Full-time · Posted Aug 13, 2026
- Location
- San Francisco
New York
Seattle
Cincinnati
About the job
Harden and extend Kernel’s Chromium-based browser runtime to operate securely and efficiently across thousands of concurrent users.
What you'll do
- Debug, patch, and optimize Chromium builds in microVM environments; implement network isolation, proxy routing, and IP handling.
- Collaborate on unikernel-based isolation, process scheduling, and kernel security policies.
- Build tools for binary analysis, crash triage, and vulnerability monitoring, and support secure supply chains and reproducible browser-image builds.
What they ask for
- Deep familiarity with Chromium internals, browser sandboxes, or renderer/network stacks.
- Experience with Linux kernel, microVMs, or container isolation.
- Strong debugging skills with strace, gdb, perf, or similar low-level tools.
- Knowledge of networking fundamentals including DNS, TCP/IP, NAT, proxies, and TLS.
Nice to have
- Background in security engineering or browser hardening.
Pay
$225K – $250K USD base salary
Tools
Chromium, Firecracker, Cloud-Hypervisor, Kata, gVisor, strace, gdb, perf
Model-written summary · the original posting is authoritative