Senior Software Engineer/Developer – San Antonio

CNF Technologies; San Antonio (TX); On-site; USD 110,000 - 170,000; Full time

Job summary

CNF Technologies seeks a Senior Software Engineer/Developer in San Antonio to design, build, and field advanced cyber tools for Windows environments. This role emphasizes offensive, defensive, and C2 capabilities, requiring deep knowledge of C/C++, Windows internals, and secure coding practices.

You will collaborate across teams, mentor junior developers, and stay ahead of evolving threats while delivering mission-critical software and tools at scale.

Qualifications

• Four years of recent system/software engineering experience with strong software architecture knowledge.
• Experience designing, developing, integrating, testing and delivering cyber capabilities.
• Strong written and verbal communication; ability to translate technical data into actionable requirements.
• Experience with C, Win32 API, and Windows/Linux internals; comfortable with scripting and tool development.
• Experience with C# or PowerShell and deep understanding of C.

Responsibilities

• Design, develop, and maintain advanced cyber tools for Windows environments across offensive, defensive and C2 contexts.
• Engineer low-level Windows components (drivers, DLLs, services) to support deployment and stealth.
• Reverse-engineer Windows internals and third-party software to identify vulnerabilities or enhance tools.
• Develop capabilities in C/C++, Rust, or Assembly for performance and control in Windows environments.
• Integrate tools with C2 frameworks, ensuring secure communications and reliability.
• Lead detection-resistant payload and implant framework development tailored to missions.
• Collaborate with red/blue teams to validate tool effectiveness and evasion against modern defenses.
• Provide mentorship and enforce secure coding practices; stay current on cyber threats and OS updates.

Skills

C

C++

C#

PowerShell

Python

Bash

Exploit development

Windows OS internals

Win32 API

Code review

Security concepts

Tools

Windbg

Ghidra

IDA

Job description

Senior Software Engineer/Developer – San Antonio

Position Description

The Senior Software Engineer/Developer will work as a technical expert in the design, development, assessment, and fielding of advanced cyber capabilities and software solutions supporting offensive, defensive, and command and control (C2) cyberspace operations. Operating within a complex and dynamic mission environment, this position is integral to supporting Air Force Cyberspace Command and U.S. Cyber Command objectives. The incumbent develops, modifies, and maintains mission-critical software and cyber tools, and manages high-impact projects to enable operational readiness and capability advancement.

MINIMUM/GENERAL EXPERIENCE

Candidate must be capable of working in a fast-paced environment. The successful candidate must have four years of recent system/software engineering experience with a strong understanding of software architecture. The candidate will possess and maintain required skills to include, but not limited to:

• Experience designing, developing, integrating, testing, and developing cyberspace capabilities/software solutions
• Experience with Windows-based command line and script development
• Experience with Bash and Python
• Experience with exploit development
• Deep understanding of C and operating system internals (Windows or Unix-like systems)
• Experience with the Win32 API
• Exceptional written and verbal communication skills
• Ability to convey technical ideas in a clear, logical fashion and translate highly technical data into easily comprehensible, actionable requirements is essential
• Experience with C# or PowerShell and deep understanding of C

Nice to Have EXPERIENCE

• Familiarity with DoD, Air Force, and national-level cyber policies, procedures, and security protocols for handling classified materials
• Experience with DoD networks
• Strong coding proficiency in supported languages and secure software development frameworks
• Advanced project management skills, including planning, scheduling, and risk assessment for complex, multi-agency projects
• Excellent communication abilities, capable of preparing and presenting technical reports, briefings, and decision papers for senior leadership
• Ability to adapt to evolving technologies, foresee technological impacts, and tailor tools and practices to specific mission sets
• Experience with C# and .NET functionality
• Experience with writing and debugging C++
• Experience with dynamic and static analysis tools like Windbg, Ghidra, IDA
• Experience writing and debugging Windows Kernel drivers
• Experience with Powershell, including using and maintaining Powershell scripts

FUNCTIONAL RESPONSIBILITY

In this role, candidate will:

• Design, develop, and maintain advanced cyber tools for Windows environments, focusing on offensive, defensive, and situational awareness capabilities
• Engineer low-level Windows components (e.g., drivers, DLLs, services) to support stealthy tool deployment, system interaction, and evasion techniques
• Reverse-engineer Windows internals and third-party software to identify vulnerabilities, develop exploits, or enhance tool effectiveness
• Develop and maintain capabilities in C/C++, Rust, and/or Assembly for maximum performance, stealth, and control in target Windows environments
• Conduct in-depth research into Windows OS internals, including kernel-mode operations, APIs, security features, and evasion techniques
• Integrate tools with command-and-control (C2) frameworks, ensuring reliability, encryption, and secure communications across various operational environments
• Lead the development of detection-resistant payloads, implant frameworks, and post-exploitation modules tailored to specific mission requirements
• Collaborate with red teams, blue teams, and threat emulation groups to validate tool effectiveness and stealth against modern EDR and antivirus systems
• Implement obfuscation, encryption, and code-packing strategies to enhance operational security (OPSEC) and avoid detection during engagements
• Provide technical mentorship and code reviews to junior developers; enforce secure coding practices and development standards
• Stay current on evolving cyber threats, zero-day exploits, and Windows platform updates to ensure toolsets remain effective and relevant
• Develop automated testing, CI/CD pipelines, and operational deployment scripts to support rapid capability integration and mission readiness

Additional REQUIREMENTS

• Must have or obtain a security clearance (TS/SCI)