Leidos is seeking a talented Mid-Level Software Engineer to join our growing team. The ideal candidate is a strong C++ developer with a solid foundation in Linux-based systems and multi-threaded application development. You will contribute to the design, development, and maintenance of high-performance, real-time software systems. We have offices across the United States engaging in the defense, space, cyber and commercial fields, We provide responsive, cost-effective engineering, scientific and IT solutions.
Primary Responsibilities
As a Mid-Level Software Engineer, you will design, develop, and maintain high-performance, real-time C++ applications on Linux using modern object-oriented principles, robust multi-threaded architectures, Google Test-driven unit testing, and GitLab-based workflows, while leveraging MATLAB for prototyping and occasionally accelerating performance with CUDA, signal-processing techniques, or radar-related algorithms. You’ll take full ownership of features from concept to deployment, contribute to system design (potentially using UML), and enhance tooling with Python, Bash, and containers—all while writing clean, well-documented code and collaborating closely in a high-trust team. We’re looking for a proactive problem-solver with excellent communication skills, a passion for quality and performance, and genuine enthusiasm for tackling challenging problems the right way in a Linux/C++ centric environment.
Basic Qualifications
- Candidate must possess a Bachelor's Degree in Computer Science, Computer Engineering, or equivalent degree from an ABET-accredited university and 2–4 years of professional software development experience or Masters with less than 2 years of prior relevant experience.
- Strong proficiency in modern C++ (C++11/14/17/20)
- Deep experience with object-oriented design and programming
- Proven expertise in multi-threaded application development
- Solid understanding of Linux development and debugging tools
- Proficiency with GitLab for version control, CI/CD pipelines, and code reviews
- Experience writing unit tests using Google Test (gtest) or similar frameworks
- Familiarity with MATLAB for prototyping or data analysis
- Experience with Agile/Scrum methodologies and task management
- Candidate must be a resident of the North Alabama area or willing to relocate to the Huntsville - North Alabama, AL area.
- Must be able to obtain and maintain a DoD Secret security clearance.
Preferred Qualifications
Additionally, a candidate with experience in the following areas is desired, however not necessarily required.
- Hands-on experience with CUDA and GPU programming
- Background in digital signal processing (DSP)
- Exposure to radar systems or RF applications
- Experience with containerization (Docker, Podman, etc.) and orchestration tools
- Proficiency or familiarity with Python
- Bash/shell scripting for automation and tooling
- Knowledge of UML for software design and documentation
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.
Original Posting:December 4, 2025For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
Top Skills
What We Do
We Are Leidos
For 50 years we have been tackling some of the biggest problems that face our nation and our world.
OUR MISSION
Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020.
Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.
Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.
Your most important work is ahead.
