Leidos is partnering with the Department of Defense’s (DoD’s) MFLC Program to support to military service members and their families across the country and around the world. In support of this important mission, Leidos is hiring a Sr. Full Stack Developer (.Net/C#).
In this hands-on position, you will work collaboratively to architect, design, build, deliver, and enhance highly available, scalable real-time systems. You will exercise your judgment in determining and recommending the best designs based on customer business objectives, timelines, and other resource constraints. You will participate in and/or direct major deliverables of projects through all aspects of the software development life cycle, including scope and work estimation, architecture and design, coding, and unit testing.
*MUST BE A U.S. CITIZEN
Primary Responsibilities:
Work in conjunction with other team members to manage the software life cycle from concept to deployment
Maintaining and enhancing future iterations of software and testing based on agile requirements
Team collaboration in a Scrum managed environment
Testing framework development/implementation, automation implementation and results validation
Modification, testing, troubleshooting, and improvement of previously developed programs
Develop and maintain technical documentation
Must be a self-starter, a strong team player, and have the ability to work independently with little supervision
Basic Qualifications:
BS degree and 8 – 12 years of prior relevant experience, or Masters with 6 – 10 years of prior relevant experience. May possess a Doctorate in technical domain
Must have experience with JavaScript, Vue, and .Net Ecosystem: C#, .Net Core, Razor, and object-oriented programming principles
Experience with relational databases
Experience with an issue/problem tracking system (e.g., Jira)
Experience with Git, CI/CD pipelines, testing frameworks, and testing automation
Proficiency with MS Office Products (Word, Excel, Visio, & PowerPoint)
Knowledge of modern software design architectures
Excellent problem-solving and communication skills
Preferred Qualifications:
Experience with configuring and deploying in AWS environments, including EC2s, ECS, and RDS
Experience with AWS GovCloud
Experience with MySQL
Experience with Medallion Data Architecture design
Experience with Unit, functional, API, and Integration testing
Experience with containerization/orchestration
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:February 20, 2026For 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.
