> Markdown version of [/jobs/ext/1992273-principal-cno-software-engineer](https://www.wearedevelopers.com/jobs/ext/1992273-principal-cno-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal CNO Software Engineer - **Company:** Zetier Inc. - **Location:** Arlington, TX, United States - **Contract:** Permanent contract - **Skills:** C (Programming Language), Application Programming Interfaces (APIs), Android Software Development, Apple IOS, C++ (Programming Language), Configuration Management, Computer Networks, Linux, Device Drivers, Firmware, GNU Debuggers, Global System for Mobile Communications, Mobile Application Software, Python (Programming Language), Linux Kernel, Mercurial, Windows API, Posix, Satcom, Reverse Engineering, Reduced Instruction Set Computing, Secure Hash Algorithm, Service Pack, Software Engineering, Subversion, System Programming, Advanced Encryption Standard (AES), Scripting, Git, IDA Pro, Windows Kernel, Zigbee, Software Version Control, Programming Languages - **Published:** August 8, 2026 - **Apply:** https://www.careerbuilder.com/job-details/principal-cno-software-engineer-arlington-va--d10591cc-0a49-4821-94ab-1fd3cf73e8f6 ## About the Role Zetier is seeking Principal CNO Software Engineers to develop operationally critical cyber capabilities. Candidates will demonstrate practical experience designing, developing, and deploying tools intersecting command and control, persistence, and networking. Required: * Highly experienced with low-level programming (C/C++) * Experience developing in scripting languages (Python) * Highly experienced in systems software development (Linux/Windows kernel drivers) * Successfully developed cutting edge end-to-end cyber solutions * Effective communication with customers and teammates * Ability to obtain and maintain a U.S. security clearance Desired: * Experience working in networking (802.11ac, Zigbee, GSM, SATCOM, SDN, UHF/VHF, 5g) * Integration with standard system libraries (POSIX, WIN32 API) * Development on embedded platforms (uBoot, drone firmware, IOT) * Reverse engineering experience (gdb, Binary Ninja, IDA Pro) * Familiar reading assembly / compiled programs (x86, x64, ARM) * Securely implemented cryptographic primitives (AES-GCM, SHA256, ECDSA) * Developed/patched version control software itself (git, svn, mercurial) * Developed software on mobile platforms (Android, iOS) * Successfully led small cross-domain development teams * Active U.S. security clearance, 802.11, ARM (Advanced RISC Machine), Advanced Encryption Standard (AES), Android, C Programming Language, C++ Programming Language, Communication Skills, Compiled Programming Languages, Computer Firmware, Diversity, Embedded Systems, Employment Law, Engineering, GDB (Gnu Debugger), GSM (Global System for Mobile Communications), Git, IDA Pro, Linux Kernel Drivers, Mercurial, Microsoft Windows Device Drivers, Mobile Applications Development, POSIX Operating Systems, Python Programming/Scripting Language, Reverse Engineering, SHA (Secure Hash Algorithm), Satellite Communications, Scripting (Scripting Languages), Security Clearance, Software Development, Software Engineering, Software Patches, Source Code/Configuration Management (SCM), Subversion, Ultra High Frequency (UHF), Unmanned Aircraft Systems (UAS), Very High Frequency (VHF), Win32 API (Application Programming Interface), iOS, x86 Processors ## Related Videos - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Using WebAssembly to run, extend, and secure your application](https://www.wearedevelopers.com/videos/652-using-webassembly-to-run-extend-and-secure-your-application) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [On developing smartphones on wheels](https://www.wearedevelopers.com/videos/258-on-developing-smartphones-on-wheels) ## Related Articles - [7 Important Tips That Every Software Developer Should Know](https://www.wearedevelopers.com/magazine/101-7-important-tips-that-every-software-developer-should-know) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Best Countries for Software Engineers](https://www.wearedevelopers.com/magazine/267-best-countries-for-software-engineers)