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Senior Software Engineer

Modern Technology Solutions, Inc.
401(k)
United States, Virginia, Chantilly
Sep 10, 2025
As a Software Engineer with MTSI, you will utilize your Java and JavaScript experience to design, implement, and maintain real-time data ingestion infrastructure for a project using an agile development model.This position will be located in Chantilly, VA.
Your essential job functions will include but may not be limited to:
  • Create and modify software which models satellite positions and simulates collection operations
  • Collaborate with team members to understand project requirements and deliver high-quality software solutions.
  • 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.
  • Understanding of backend development fundamentals, including Node.js and RESTful API design.
  • 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.
Necessary Qualifications:
  • 10+ years of experience as a Software Engineer or a related field.
  • Java Script
  • Familiarity with PostgreSQL
  • Basic Modeling and Simulation Experience
Desired Qualifications:
  • Satellite Modeling and Simulation experience
  • TypeScript experience
  • Knowledge of relational databases
  • Knowledge of containerization and container orchestration tools (e.g., Docker, Helm, Kubernetes).
  • Experience with cloud platforms such as AWS or Azure.
Educational Requirements:
  • Bachelor's Degree in Information Systems, computer science, data science, engineering, math, statistics, operations research, or related field.
Certifications Desired:
  • DoD 8570 IAT level 3 (CompTIA Security+) compliant. (Desired)
Clearance Requirements:
  • TS/SCI with eligibility for a CI Polygraph.
  • 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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