> Markdown version of [/jobs/ext/2518687-principal-software-engineer](https://www.wearedevelopers.com/jobs/ext/2518687-principal-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 Software Engineer - **Company:** Apogee, Inc. - **Location:** Arlington, VA, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** C++ (Programming Language), Profiling, Network Security, Software Maintenance, Reverse Engineering - **Published:** August 3, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=ec5ee2e3d8a3acd0 ## About the Role * Extensive experience building robust and maintainable software to solve algorithmically complex problems * High proficiency in C++ * Thorough understanding of the fundamentals of computer and network security * Strong analytical and problem solving and organizational skills * Demonstrated ability to be flexible and remain well organized in a fast-paced environment The position is located in our Arlington, VA office (full-time in person). Existing DoD Top Secret clearance is extremely desirable, otherwise all candidates must be eligible to obtain one and therefore all candidates must be a US citizen to apply. ## Description Apogee Research is looking for Principal Software Engineers to lead the creation of capabilities addressing currently unmet needs in National Security. This work spans many fronts from implementing novel algorithms across ISR, EW, Networking, Cyber, and more; integrating disparate systems that lack a common interface; reverse engineering subsystems; developing custom tool chains that accelerate the speed of development; or developing new approaches to infrastructure that handle heterogeneous deployment needs. The details of the position will vary based on the expertise and desires of the candidate and the specific project being executed, however, common themes include: * Performing hands-on technical work including design and development of algorithmically complex software, performance profiling, optimization, and general troubleshooting for a variety of software languages spanning from C++ to project-specific Domain Specific Languages (DSLs) * A focus on addressing customer needs and facilitating creation of operationally relevant capabilities * Supporting demonstration and testing of software in lab and test events * Mentoring junior team members to foster growth of technical and program expertise * Creating documentation and test suites to help warfighters and co-contractors leverage our solutions * Learning new technologies and developing fundamentally new approaches as needed ## Related Videos - [Profiling Symfony & PHP apps with Blackfire](https://www.wearedevelopers.com/videos/265-profiling-symfony-php-apps-with-blackfire) - [Small, Secure, Interconnected: The next Internet Protocol](https://www.wearedevelopers.com/videos/100062-small-secure-interconnected-the-next-internet-protocol) - [Hacking iOS and Developing for Airbnb with Nicolas Haunold, Software Engineer at Airbnb](https://www.wearedevelopers.com/videos/100361-hacking-ios-and-developing-for-airbnb-with-nicolas-haunold-software-engineer-at-airbnb) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Cyber Sleuth: Finding Hidden Connections in Cyber Data](https://www.wearedevelopers.com/videos/893-cyber-sleuth-finding-hidden-connections-in-cyber-data) - [Enhancing Workload Security in Kubernetes](https://www.wearedevelopers.com/videos/356-enhancing-workload-security-in-kubernetes) ## Related Articles - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [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)