Junior .NET Developer (C#) - Remote

Fully remote Full-time $90,000-$100,000 annual salary 315, LLC builds and operates Cairn, a healthcare revenue cycle management platform running on .NET and Microsoft Azure.

We're hiring a junior C# developer to join our engineering team and contribute to an active codebase modernization - translating existing Visual Basic modules into clean, maintainable C#.

You'll work directly with the architect who built the platform, learning healthcare billing systems from the ground up while writing production code from day one.

WHAT YOU'LL DO - Translate existing VB.NET modules into modern C# - Build and maintain web application features across the Cairn platform - Write clean, well-documented, testable code against an MSSQL database - Participate in code reviews with the senior architect who built the platform - Support and extend API and web service integrations - Follow secure development practices appropriate for a HIPAA-regulated environment WHY THIS ROLE This isn't a maintenance job.

You'll be part of a defined modernization effort , writing new C# code against a production healthcare platform used by medical practices across Georgia.

You'll learn directly from the engineer who architected the system - someone with deep institutional knowledge of healthcare billing, claims processing, and payer integrations.

For a junior developer, this is rare: real production responsibility, structured mentorship, and a project with a beginning, middle, and end.

Requirements - 1-3 years of professional experience writing C# on .NET (internships and substantive project work count) - Working knowledge of SQL and relational database concepts - Familiarity with Microsoft Azure and version control workflows (branching, pull requests, code review) - Ability to read and understand existing code in order to translate it accurately - Self-directed work habits - you'll be remote, and we trust you to manage your time - Comfort asking questions and learning in a mentorship-driven environment - Bachelor's degree in Computer Science or related field preferred; equivalent professional experience, completed bootcamp programs, or a demonstrated portfolio of .NET/C# work will be given equal consideration- 1-3 years of professional experience writing C# on .NET (internships and substantive project work count) NICE TO HAVE - Exposure to Visual Basic .NET or legacy .NET codebases - Familiarity with Microsoft Azure (App Services, Azure SQL, DevOps) - Any experience with healthcare billing, EDI transactions, or HL7 messaging - Experience with ASP.NET Web Forms Benefits - Annual salary: $80,000-$100,000 - Individual medical insurance premium 100% employer-paid (dental and vision plans available at employee cost) - 401(k) with employer match up to 3% - Life insurance (Basic, Voluntary & AD&D) - Paid time off: vacation, sick leave, and public holidays - Fully remote position