Senior Principal Software Developer (System Security)

Location: Hybrid in Huntsville, Alabama, United States

Company

hirify.global provides cyber, data operations, systems integration, intelligence mission support, and software modernization services for U.S. government, defense, intelligence, civil, and commercial customers.

What you will do

• Develop and enhance OS-level security features for Windows, Linux, and VxWorks.
• Build cyber detection and response mechanisms against advanced persistent threats.
• Implement cryptographic binding of sensitive software to trusted hardware.
• Create system lockdown capabilities that minimize attack surfaces.
• Integrate Hardware Root of Trust solutions and support multi-OS security products.
• Protect mission-critical Department of Defense weapon systems and platforms from sophisticated attacks.

Requirements

• U.S. Citizenship and eligibility to obtain and maintain a Secret government security clearance are required.
• 10+ years of professional software development experience in systems-level programming, or a university degree/equivalent experience with 10+ years of relevant experience; alternatively, an advanced related degree with 7+ years of experience.
• Expert-level C/C++ skills, including memory management, pointers, and low-level programming concepts.
• Expert OS-level systems programming experience beyond desktop or high-level application development.
• Experience debugging complex system issues such as crashes, memory corruption, and system-level problems using gdb, WinDbg, Visual Studio Debugger, or similar tools.
• Git version control proficiency in a team environment.
• Proven ability to independently learn and master new technical domains.
• Primary experience must not be limited to web development, mobile applications, enterprise applications, high-level languages without C/C++ depth, cloud services, DevOps, or infrastructure automation.

Nice to have

• Experience with kernel modules, device drivers, system services, OS internals projects, or security tools.
• Experience with anti-malware, EDR, security monitoring, or exploit mitigation.
• Knowledge of process and thread management, memory management, I/O systems, and interrupt handling.
• Assembly language experience with x86_64 or ARM.
• Python or Batch scripting for automation and testing.
• Knowledge of cryptography, threat modeling, attack surfaces, boot processes, firmware, TPM, Secure Boot, or UEFI.
• Familiarity with Linux Driver Model or Windows driver models including WDM, WDF, or WDK.

Culture & Benefits

• Work with senior engineers experienced in mission-critical system protection.
• Develop expertise in Linux and Windows internals, kernel development, and low-level security.
• Contribute to cyber resiliency spanning hardware, firmware, software, and network layers.
• Access cutting-edge tools, training, and technologies.
• Work in a collaborative environment focused on solving complex cybersecurity and intelligence challenges.