Linux / Infrastructure Security Engineer

Security Engineer (Infrastructure / Linux)

Location: San Francisco, CA (Hybrid: 4 days onsite, 1 day WFH)

A well-funded client is seeking a senior Security Engineer to secure infrastructure that runs untrusted code at massive scale. This role is focused on Linux and infrastructure security, balancing strong isolation guarantees with high-performance requirements in a distributed environment.

Responsibilities

Secure high-scale infrastructure executing untrusted workloads

Design and implement defense-in-depth security for sandboxed and microVM-based systems

Build real-time threat detection across large numbers of concurrent environments

Apply Linux security primitives to enforce isolation and runtime protection

Ensure compliance with enterprise security standards while maintaining low-latency performance

Tech Stack

Go, Rust, C, TypeScript, Linux security, container hardening

Qualifications

5+ years of experience securing production infrastructure

Deep hands-on experience with Linux security primitives such as seccomp / eBPF and namespaces

Experience securing distributed systems at scale

Familiarity with compliance frameworks including SOC 2, ISO 27001, and GDPR

Comfortable working close to the system; kernel-level security experience is a plus