New

Senior Software Engineer (Full Scope Polygraph)

Modern Technology Solutions, Inc.
401(k)
United States, Maryland, Annapolis
123 Main Street (Show on map)
Oct 20, 2026
Modern Technology Solutions, Inc. (MTSI) is hiring a Senior Software Engineer in Annapolis Junction, Maryland. Qualified candidates must be U.S. citizens with a TS/SCI clearance and Full Scope Polygraph. The Software Engineer develops, maintains, and enhances complex and diverse software systems (e.g., processing-intensive analytics, novel algorithm development, manipulation of extremely large data sets, real-time systems, and business management information systems) based upon documented requirements. Works individually or as part of a team. Reviews and tests software components for adherence to the design requirements and documents test results. Resolves software problem reports. Utilizes software development and software design methodologies appropriate to the development environment. Provides specific input to the software components of system design to include hardware/software trade-offs, software reuse, use of Commercial Off-the-shelf (COTS)/Government Off-the-shelf (GOTS) in place of new development, and requirements analysis and synthesis from system level to individual software components. Responsibilities: Analyze user requirements to derive software design and performance requirements Debug existing software and correct defects Provide recommendations for improving documentation and software development process standards Design and code new software or modify existing software to add new features Integrate existing software into new or modified systems or operating environments Develop simple data queries for existing or proposed databases or data repositories Write or review software and system documentation Serve as team lead at the level appropriate to the software development process being used on any particular project Design or implement complex database or data repository interfaces/queries Develop or implement algorithms to meet or exceed system performance and functional standards Assist with developing and executing test procedures for software components Develop software solutions by analyzing system performance standards, confer with users or system engineers; analyze systems flow, data usage and work processes; and investigate problem areas Modify existing software to correct errors, to adapt to new hardware, or to improve its performance Design, develop and modify software systems, using scientific analysis and mathematical models to predict and measure outcome and consequences of design Design or implement complex algorithms requiring adherence to strict timing, system resource, or interface constraints; Perform quality control on team products Implement recommendations for improving documentation and software development process standards Oversee one or more software development teams and ensure the work is completed in accordance with the constraints of the software development process being used on any particular project Confer with system engineers and hardware engineers to derive software requirements and to obtain information on project limitations and capabilities, performance requirements and interfaces Coordinate software system installation and monitor equipment functioning to ensure operational specifications are met Required Qualifications: Fourteen (14) years experience as a SWE in programs and contracts of similar scope, type, and complexity is required. Proficiency working in Linux development environments Proficiency coding in Python, C++, Java, or JavaScript Desired Qualifications: Proficiency coding in Python, C++, Java, or JavaScript Experience with Software-Defined Radio (SDR) Programming Experience with geospatial processing Experience coding 2D and 3D image displays Experience with GitLab, GitHub, or similar version controls Experience with Jira/Confluence, or similar project management tools Education Requirements: Bachelor's degree in Computer Science or related discipline from an accredited college or university is required. Four (4) years of additional SWE experience on projects with similar software processes may be substituted for a bachelor's degree. Clearance Requirements: TS/SCI with Full Scope Polygraph The pay range for this position is $125,000 to $275,000/year; however, base pay offered may vary depending on established government contract ranges, job-related knowledge, skills, and experience, and other factors. MTSI also offers a full range of medical, financial, and other benefits, dependent on the position offered. Base pay information is based on market location. Applications will be accepted on an ongoing basis. This posting will be renewed periodically until the position is filled. #LI-RC2* 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.