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  

Qualifications

Education:

• Bachelor's or Master's degree in computer science, electronics engineering or other engineering or technical discipline is required

Experience:

• Minimum of 8 years of experience in software development using C#/.NET technologies  
• Proven track record of working on complex software projects and leading development initiatives  
• Experience with designing, developing, and deploying enterprise-level applications

Requirements:

• Strong proficiency in C#/.NET ecosystem  
• Proficiency in developing back-end applications using design and integration patterns  
• Hands-on AWS experience (serverless, messaging, storage, databases) preferred  
• Strong SQL skills: writing and optimizing stored procedures, troubleshooting execution plans, performance tuning in MSSQL  
• Proficient with Git and GitHub   
• Experience with MSSQL or similar relational databases  
• Proficiency in database design and development, including working with SQL Server and Entity Framework
• Familiarity with cloud platforms (e.g., Microsoft Azure, AWS) and services
• Understanding of continuous integration/continuous deployment (CI/CD) practices and tools (e.g., AWS CodePipeline, CodeBuild, CodeDeploy)
• Knowledge of unit testing frameworks and tools (e.g., NUnit, xUnit, MSTest). - Proficiency in using development tools like Visual Studio and Visual Studio Code
• Excellent problem-solving and analytical skills
• Strong communication and interpersonal abilities
• Ability to work independently and as part of a large team
• Attention to detail and commitment to producing high-quality software
• Ability to prioritize tasks and manage time effectively using JIRA
• Experience with agile development methodologies (e.g., Scrum, Kanban)
• Familiarity with DevOps practices and infrastructure as code (IaC)
• Ability to conduct code reviews and provide constructive feedback
• Experience with performance tuning and optimization of applications
• Knowledge of microservices and event-driven architecture and containerization technologies (e.g., Docker, ECS, EKS) is a plus
• Experience with healthcare payer/PBM systems, clearinghouses, or pharmacy operations is a plus

  Clearance Requirement:

• US Citizenship with the ability to obtain and maintain a Public Trust clearance

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.