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Senior Software Engineer - Security

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Senior Software Engineer - Security in USA new

  • San Francisco, CA

Responsibilities

  • Implement Linux kernel security enhancements, configuration hardening, CVE triage, and vulnerability mitigations.
  • Enforce mandatory access controls, secure the boot path, and establish CI guardrails and fuzzing coverage.
  • Research kernel, driver, and operating system vulnerabilities and backport non-trivial upstream fixes to production.
  • Establish secure coding practices and conduct security-focused code reviews, particularly for C code.
  • Use and develop tools for kernel security auditing, fuzzing, static analysis, dynamic analysis, debugging, and vulnerability discovery.
  • Audit and harden Cloud Hypervisor device models and vhost-user datapaths, reduce privilege, and improve confidential computing isolation.
  • Support security incident response, root-cause analysis, containment, and recovery for kernel- or OS-level compromises.
  • Balance security enhancements with performance requirements for high-performance AI infrastructure.
  • Collaborate with hardware, hypervisor, OS, cloud infrastructure, and security operations teams.
  • Provide technical guidance and mentorship to junior engineers.
  • Own kernel CVE triage end to end and ship backported fixes through the full release path.
  • Define kernel security response SLAs and hardening baselines and enforce them across supported SKUs.

Requirements

  • Bachelor’s degree in Computer Science, Computer Engineering, or a related field.
  • At least 5 years of relevant industry experience, including at least 3 years focused on low-level operating systems or kernel security.
  • Deep knowledge of Linux kernel internals, including memory management, process scheduling, system calls, and I/O subsystems.
  • Understanding of kernel vulnerabilities, exploitation techniques, and security mitigations such as ASLR, DEP/NX, SMEP/SMAP, KASLR, namespaces, cgroups, SELinux, and AppArmor.
  • Strong secure coding background and experience conducting security-focused code reviews in C.
  • Proficiency with kernel debugging and security analysis tools such as GDB, crash, kgdb, valgrind, address sanitizers, and fuzzers.
  • Familiarity with hardware-assisted security features including Intel SGX, AMD SEV, and ARM TrustZone.
  • Experience with CVE remediation and automation.
  • Ability to pass a background check and demonstrate the company’s values.
  • Preferred experience includes kernel security projects or open-source contributions, hypervisor security, HSMs, TPMs, and kernel-level offensive security or penetration testing.

Benefits

  • Competitive compensation, bonus, and equity packages, including Restricted Stock Units.
  • Paid time off, paid holidays, and leave of absence programs.
  • Comprehensive health, dental, and vision insurance.
  • Employer HSA contributions, paid parental leave, paid life insurance, and short- and long-term disability coverage.
  • Professional development, tuition reimbursement, and mental health and wellness support.
  • Commuter benefits, a cell phone stipend, and a 401(k) plan with company match up to 4% of salary.
  • Volunteer time off, global travel insurance, emergency assistance, daily meal allowance, and location-specific perks.

Salary: $170k - $205k/yr

Crusoe

As the AI factory company, Crusoe is on a mission to accelerate the abundance of energy and intelligence. The company provides a reliable, scalable, cost-effective, and energy-first solution for AI infrastructure. By harnessing large-scale energy resources, building AI-optimized data centers, and...

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