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C# Software Developer

Job in Springfield, Fairfax County, Virginia, 22161, USA
Listing for: inventium.io LLC
Full Time position
Listed on 2026-09-12
Job specializations:
  • Software Development
    Software Engineer, DevOps, Full Stack Developer, Software Testing
Salary/Wage Range or Industry Benchmark: 90000 - 130000 USD Yearly USD 90000.00 130000.00 YEAR
Job Description & How to Apply Below

Software Developer (C#)

Location:

Fort Belvoir, VA (telework eligible; system- and project-specific)

Employment Type:

Full-time

Clearance:
Active DoD Secret clearance required

Inventium.io is searching for a C# Software Developer to join our team at Fort Belvoir, VA. Our Software Developers use agile software development methodology to develop and maintain enterprise applications, utilizing an Oracle backend with PL/SQL-based database programming and user interface programming in C#.

How You Will Make a Difference
  • Provide software development programming, design, integration, documentation, configuration management, testing, release, and user support for all program software and system engineering.
  • Develop and maintain applications in accordance with current CMMI for Development Level 3 standards.
  • Develop software tools to support testing, analysis, and data management.
  • Provide software maintenance to ensure continued operational capability of the test systems software.
  • Ensure software development plans include standards, configuration management, quality assurance, and lifecycle processes.
  • Develop lifecycle artifacts to support Independent Verification and Validation (IV&V) of the software by any designated outside organization.
  • Provide sustainment for currently fielded software and accomplish software redesign as required.
  • Attend and participate in system requirements, design, and milestone reviews
  • Ensure user sites are continuously operational and that fielded maintenance upgrades fully meet user needs.
  • Ensure currently fielded legacy systems remain fully operational while changes are being made to the software, and that legacy and updated sites operate as software updates are fielded.
  • Ensure system maintenance and redesign are accomplished with minimal disruption at user locations.
  • Explore and document potential additional hardware and software test enhancements in anticipation of upgrades to the next release.
  • Perform and provide guidance on all phases of the software development lifecycle.
  • Provide guidance to less-experienced software developers in creating models and diagrams that show programmers the software code needed for an application.
  • Perform and provide guidance on software updates, refinement, testing, and debugging to meet business needs.
  • Provide relevant analysis for reports on software project specifications, activities, and status.
  • Thoroughly document software and system processes for future maintenance and updates.
  • Develop new features using WPF with the PRISM framework.
  • Work directly with customers to gather requirements and design windows and views based on concept designs.
Qualifications

Required:

  • BS degree and 5 years of relevant experience; additional years of experience, certifications, and training may be considered in lieu of a degree.
  • Active DoD Secret security clearance.
  • Experience with C#, Oracle/SQL, and Git source control.
  • Experience with Oracle databases, PL/SQL, and SQL for application data interaction.
  • Experience with WPF and the PRISM framework.
  • Experience with Azure Dev Ops and the Git Flow branching model.
  • Experience using Fortify, Sonar Lint, or other static code analysis scanners.
  • Experience applying secure defensive coding practices in C# application development.
Preferred
  • Experience with Agile methodologies.
About Inventium.io

Inventium.io LLC is a technical consulting and software development services company dedicated to protecting and advancing our national defense and scientific capabilities. Based in the Washington, DC area, we rely on innovation to continually advance our employees’ skills and provide digital transformation solutions to our customers.

With a proven record of successfully delivering quality services and solutions to multiple federal agencies, our technical competencies include Emerging Technology Solutions, Dev Sec Ops , Cloud Migration, Machine Learning, System Modernization, and Technology Management.

Benefits and Perks
  • Employer-paid health benefits (medical, dental, and vision)
  • Retirement plan
  • Paid time off and federal holidays
  • Training and development
  • Awards and recognition
  • Employee referral program

Inventium.io LLC is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or protected veteran status.

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