Platform Security Engineering, Operating Systems Security Engineer

Details

About the role

We are looking for an Operating Systems Security Engineer to harden and secure the OS layer of our infrastructure. You will design and implement OS-level security controls, from kernel hardening to runtime protection, ensuring systems can withstand sophisticated attacks while maintaining performance required for AI model training.

This is a hands-on role working with cutting-edge hardware and implementing novel security solutions for environments that don't exist anywhere else. You will need to balance extreme security requirements with operational needs for researchers training models at unprecedented scale.

Responsibilities

• Design and implement hardened OS configurations for AI workloads across diverse hardware platforms
• Minimize attack surfaces by removing as many unnecessary components as possible from kernelspace and userspace
• Develop kernel security policies using SELinux, AppArmor, and custom Linux Security Modules, plus runtime enforcement mechanisms
• Implement and maintain full-disk encryption solutions for diverse storage systems
• Build security infrastructure for AI systems, research environments, and production services
• Create OS-level attestation and integrity monitoring systems
• Apply security patches, develop patches for custom kernel modules, and kernel hardening configurations
• Design secure boot processes and trusted execution environments
• Work with container teams to ensure proper workload isolation at the kernel level
• Design privilege separation and mandatory access control policies
• Implement secure update mechanisms for OS components
• Build tooling for security configuration management and compliance verification
• Serve as a subject matter expert for OS security questions and designs

Requirements

• Deep knowledge of Linux internals, including kernel subsystems and security frameworks (SELinux, AppArmor, seccomp, etc.)
• Experience with kernel hardening techniques and exploit mitigation
• Strong programming skills in C and systems programming languages
• Experience with eBPF for security monitoring and enforcement
• Understanding of virtualization and containerization security
• Track record of identifying and fixing OS-level security vulnerabilities
• Experience with security-focused Linux distributions

Preferred qualifications

• 5+ years of experience in operating systems security or kernel development
• Kernel development experience or contributions to Linux kernel
• Experience with real-time or embedded operating systems
• Knowledge of hardware security features and their OS integration
• Experience with secure boot technologies
• Experience with confidential computing and memory encryption technologies (SEV, TDX, SGX)
• Background in vulnerability research, exploit development, or fuzzing
• Experience with formal methods for OS verification
• Knowledge of hardware security features and their OS integration (TPM, HSM, secure enclaves)

Logistics

• Location-based hybrid policy: Expect all staff to be in one of the offices at least 25% of the time.
• Visa sponsorship: The company sponsors visas, and if an offer is made, they will make every reasonable effort to get you a visa and retain an immigration lawyer to help.