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Software Engineer

Modern Technology Solutions, Inc.
401(k)
United States, Virginia, Chantilly
Feb 13, 2026
Modern Technology Solutions, Inc. (MTSI) is seeking an Software Engineer with experience in Java and JavaScript to join our team in Chantilly, VA.We are a small, but highly empowered team where every team member is directly responsible for the success of our mission.In your role, you will be responsible for designing, implementing, and maintaining software applications across one or more projects using an agile development model.
Key Responsibilities:
  • Collaborate with team members to understand project requirements and deliver high-quality software solutions.
  • Develop and maintain the front-end and back-end components of web applications and web services.
  • Assist with the testing and deployment of code in a secure cloud environment.
  • Troubleshoot, debug, and optimize code for performance and scalability.
  • Participate in code reviews and provide constructive feedback to peers.
  • Actively participate in the agile development process, including sprint planning and daily stand-ups.
Required Qualifications:
  • Bachelor's degree in computer science, data science, engineering, math, statistics, or related field.
  • Solid understanding of web development fundamentals, including HTML, CSS, and JavaScript.
  • Experience with a front-end JavaScript framework such as Vue.js.
  • Familiarity with at least one server-side language such as Java, Python, or C.
  • Experience working with Linux-based servers and systems.
  • Understanding of version control systems (e.g., Git, Mercurial).
  • Ability to work both independently and in a collaborative team environment.
  • Excellent verbal and written communication skills.
Desired Qualifications:
  • Knowledge of relational databases (e.g., MySQL, PostgreSQL).
  • Experience with cloud platforms such as AWS or Azure.
  • Knowledge of containerization and container orchestration tools (e.g., Docker, Helm, Kubernetes).
  • Understanding of RESTful API design principles.
  • Familiarity with Agile methodologies.
Desired Certification:
  • Current certification compliant with DoD 8570 IAT level 3 (CompTIA Security+)
Required Clearance:
  • Current Top Secret/SCI with CI Poly
  • U.S. Citizenship is required for this position.
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  • Interesting Work:



    Our co-workers support some of the most important and critical programs to our national defense and security.






  • Values:



    Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry.






  • 100% Employee Owned:



    We have a stake in each other's success, and the success of our customers. It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year.






  • Great Benefits - Most Full-Time Staff Are Eligible for:





    • Starting PTO accrual of 20 days PTO/year + 10 holidays/year


    • Flexible schedules


    • 6% 401k match with immediate vesting up to $9k annually


    • Semi-annual bonus eligibility (July and December)


    • Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account


    • Up to $10,000 in annual educational reimbursement


    • Other company funded benefits, like life and disability insurance


    • Optional zero deductible Blue Cross/Blue Shield health insurance plan







  • Track Record of Success:



    We have grown every year since our founding in 1993.




Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance

MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide.

For more information about MTSI, please visit www.mtsi-va.com

MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.


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