Senior Staff Linux Security Engineer

Join the Crusoe Cloud Software Development team as a Senior Staff Linux Security Engineer. In this critical role, you will strengthen the security posture of our core Linux kernel and operating system components, which are essential for our AI cloud solutions.

You will also collaborate with other engineering teams, provide technical leadership, and debug complex security-related issues at the kernel level.

Responsibilities

• You will implement kernel security enhancements, enforce access controls, conduct vulnerability research, establish secure development practices, and provide incident response support.
• This is a full-time position with comprehensive health benefits, paid time off, a 401(k) matching program, and resources for mental wellness.
• Implement kernel security enhancements, manage configuration hardening, and triage incoming CVEs to assess severity and exploitability.
• Enforce mandatory access controls, secure the boot path, and establish CI guardrails and fuzzing coverage to prevent regressions.
• Research vulnerabilities across kernel, driver, and OS components to build proactive mitigations and backport non-trivial upstream fixes to production.
• Vulnerability & Exploitation Knowledge: Solid understanding of common kernel vulnerabilities (e.g., privilege escalation, information disclosure, denial of service) and associated exploitation techniques
• First year: Kernel security response has a defined SLA by severity and we consistently hit it. A hardening baseline is defined, enforced in CI, and rolled out across supported SKUs. Cloud Hypervisor has been audited and the highest-value isolation gaps are closed or scheduled
• Company Values: Embody the Company values

Requirements

• Safety and Compliance: Must be able to pass a background check
• Hardware Security Concepts: Familiarity with hardware-assisted security features (e.g., Intel SGX, AMD SEV, ARM TrustZone) and their relevance to kernel security
• Debugging & Analysis Tools: Proficiency with kernel debugging tools (e.g., GDB, crash, kgdb) and security analysis tools (e.g., valgrind, address sanitizers, fuzzers)

Experience dealing with CVE Remediation and automation

• Education & Experience: Bachelor's degree in Computer Science, Computer Engineering, or a related field, and a minimum of 5 years of relevant industry experience with at least 3 years focused on low-level operating systems or kernel security
• First 90 days: You own kernel CVE triage end to end and have shipped at least one backported fix through our full release path. You have an independent read on where our kernel configuration is weakest
• Linux Kernel Security Expertise: Proven deep knowledge of Linux kernel internals (e.g., memory management, process scheduling, system calls, I/O subsystems) with a strong focus on security aspects
• Secure Coding: Strong background in secure coding principles and experience conducting security-focused code reviews, particularly in C
• Security Mitigations: Experience with existing Linux kernel security mitigations (e.g., ASLR, DEP/NX, SMEP/SMAP, KASLR, namespaces, cgroups, LSMs like SELinux/AppArmor)
• Experience with specific kernel security projects or contributions to open-source kernel security initiatives
• Experience with hardware security modules (HSMs) or Trusted Platform Modules (TPMs)
• Familiarity with hypervisor security and the interaction between the hypervisor and the guest kernel's security
• Background in offensive security or penetration testing at the kernel level

Pay

USD 250,000 - 300,000