Senior Software Engineer (C#/.NET Developer)

Elios is a company focused on healthcare data management, and they are seeking a Senior Software Engineer to own backend work for a major federal healthcare program. The role involves hands-on C#/.NET and AWS development, focusing on EDI transaction processing and backend services integration with various partners.

Responsibilities:

• Design, build, and maintain C#/.NET and AWS backend services that handle high-volume healthcare EDI transactions
• Parse, validate, and transform X12 EDI documents (837, 835, and others)
• Write, optimize, and troubleshoot SQL stored procedures, including execution plan tuning and complex transformations
• Query, parse, and manipulate XML object store data inside MSSQL
• Debug transaction-level issues across payers, clearinghouses, and trading partners
• Contribute to shared platform libraries and services used across product initiatives
• Participate in technical planning, requirements definition, and test planning with engineering, product, and stakeholders
• Deploy, monitor, and support production code, and step in when things go wrong

Requirements:

• 8+ years of C#/.NET development experience, with a track record on complex enterprise applications
• Strong proficiency in the C#/.NET ecosystem and back-end design and integration patterns
• Strong SQL skills: writing and optimizing stored procedures, troubleshooting execution plans, MSSQL performance tuning
• Database design with SQL Server and Entity Framework
• Bachelor's or Master's in Computer Science, Engineering, or a related technical discipline
• US Citizenship required, with the ability to obtain and maintain a Public Trust clearance
• Hands-on AWS experience (serverless, messaging, storage, databases)
• Familiarity with Azure
• CI/CD practices with AWS CodePipeline, CodeBuild, CodeDeploy
• Familiarity with IaC and DevOps practices
• Comfortable with microservices, event-driven architecture, and containerization (Docker, ECS, EKS)
• Agile delivery (Scrum, Kanban) and JIRA
• Experience with healthcare payer/PBM systems, clearinghouses, or pharmacy operations