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Posted Jun 1, 2026

Sr. Software Systems Engineer (C#/.NET Developer)

SAIC is searching for a motivated, career and customer-oriented Sr. Software Engineer (C#/.NET Developer) who will work across EDI transaction processing, backend API development, and cloud native systems on AWS. This is a hands-on engineering role with direct impact on how VA healthcare data flows through our platform.  This is a 100% Remote role.      JOB DESCRIPTION   Design, build, and maintain C#/.NET/AWS backend services handling high-volume healthcare EDI transactions (837, 835, etc.)   Parse, validate, and transform X12 EDI documents   Debug complex transaction-level issues across payers, clearinghouses, and trading partners   Write, optimize, and troubleshoot SQL stored procedures including performance tuning, query analysis, and complex data transformations   Work with XML object store data: query, parse, and manipulate structured XML within MSSQL   Write clean, testable, well-documented code and participate actively in code review   Contribute to shared platform libraries and services used across multiple product initiatives   Performs technical planning, high level and detailed requirements definition, test planning and execution with team members and stakeholders on a daily basis   Serve as an active member of the software development team participating in daily stand-ups   Deploy, support and ensure the performance, quality, and responsiveness of application   Provide development support, as needed, for solutions deployed to production   Implement long term solutions and building blocks within the agile framework for improved reusability   Apply and promote best software engineering practices   Use Integrated Development Environment (IDE) tools to include Visual Studio and Git   SAIC® is a premier mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives. We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.