Application Developer / Software Engineer

About the role

TekSynap is looking for an Application Developer/Software Engineer to join its Fairfax County team. The role involves full‑life‑cycle development of client‑server and web applications supporting federal agencies, including the Intelligence Community and Department of Defense.

Key responsibilities

• Design, develop, test, and debug high‑performance, scalable software solutions.
• Produce detailed functional and technical specifications for web and mobile applications.
• Lead integration activities for operational, tactical, and strategic systems.
• Perform complex programming, ETL processing, and data conversion tasks.
• Supervise junior developers on major system projects and ensure code quality.
• Maintain compliance with Fairfax County standards and federal security requirements.

Required profile

• 4‑6 years of professional software development experience.
• U.S. citizenship with the ability to pass a background check and obtain a Public Trust – Moderate Risk clearance.
• Demonstrated experience supporting government agencies or contracts in a federal environment.
• Strong knowledge of the software development life‑cycle (SDLC) and agile practices.

Required skills

• ASP.NET, C#, Python, Java, C/C++
• HTML, XHTML, XML, XSLT, CSS, JavaScript.NET Framework
• SQL, SQL Server, SQL reporting
• Visual Studio, GIT, CI/CD pipelines
• AI/ML concepts, SharePoint, Microsoft Power Platform
• Internet Information Services (IIS), MarkLogic, Oracle, Oracle APEX