Principal Software Engineer

Job Title: Principal Software Engineer Location: Marietta, GA Salary Range: $160,000 - $200,000 + Bonus Eligible Active Secret Clearance required to Start Company Overview Founded in 2004 with locations in Atlanta, GA and Fort Worth, TX, Thompson Software Solutions LLC. team understands what is required to develop, integrate, test, and deploy software with a safety-critical pedigree while meeting the challenges of modernization and digital transformation. As a defense-focused software company of proven and dedicated employees, we take pride in our ability to react quickly and produce quality solutions to difficult technical challenges. We work with partners to find the right path to meet operational needs while future-proofing systems with portability and sustainment considerations to ensure next-generation success. Description Thompson Software Solutions is seeking aPrincipal Software Engineerwho is ready to work with a talented team to provide innovative solutions for tomorrow's problems. This position requires a software engineer to use a wide application of technical principles, theories, and concepts in the software field to develop, integrate, and test software products. The successful candidate will be a member of a high-performing multi-site team and must be self-motivated with a strong work ethic, time-management, and interpersonal skills. In this role, you will work independently at times on projects, at other times will be in a collaborative team environment with other software engineers, as well as other program development and deployment teams. Selected applicants will be subjected to a government security investigation and must meet eligibility requirements for access to classified information and must maintain eligibility for continued access to classified information throughout their employment as required by the job. Who we are: Thompson Software Solutions LLC. is a subsidiary of Lynx. Lynx delivers modular, open standards-based software solutions that redefine the economics of developing, deploying, and maintaining high assurance, mission critical edge platforms. These secure edge computing solutions are designed to drive innovation and operational excellence in today's most demanding environments. From advancing aerospace and defense capabilities to transforming commercial and industrial systems, Lynx collaborates across a wide range of industries, including automotive, medical, and critical We're a fast-growing company driving innovation in autonomy, AI, and visualization technologies. If you're a self-driven leader ready to shape the future of secure, high-assurance systems, we want to hear from you Basic Requirements: Bachelor's degree in a STEM discipline 10+ years of C/C++/Ada software development experience Prior experience writing embedded software (C, C++, and/or Ada) Prior experience troubleshooting/debugging on target hardware in lab/mock-up environments Prior experience using IBM DOORS to author, review, and maintain software requirements with full traceability. HW I/O device development and integration (MIL-STD-1553, ARINC 429, RS232, discrete, analog) Proficient with Linux and Windows development environments Experience with real-time operating system integration (e.g. Lynx, Green Hills, Wind River) Ability to professionally communicate project status and collaborate on technical solutions with clients and peers Ability to work onsite 100% Ability to travel 25% Preferred / Additional Skills Master's degree in a STEM discipline Experience developing embedded safety critical software in Ada Proficient with Atlassian or similar tools (Confluence, JIRA, Bitbucket, etc.) Experience using static analysis tools (Parasoft, Coverity, SonarQube, or similar analysis tool) Experience with structural coverage and software test automation tools for embedded systems (e.g. VectorCAST) Experience with DO-178C, MIL-HDBK-516 and safety-critical software development practices Experience with Integrated Modular Avionics (IMA), ARINC 653 and flight software development Experience communicating and documenting complex technical designs Excellent written and verbal communication and presentation skills Sound Exciting? Get in touch today! We have very robust benefits including: Low-cost Medical / Dental / Vision coverage options 401K with generous employer match Responsible Paid Time Off + 11 Paid Holidays Remote work opportunities based on role Employee Assistance Program (EAP) Career growth and professional development opportunities All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.

Created: 2026-03-04