Senior .NET Backend Engineer - Remote Healthcare API Expert

York Solutions, LLC; United States; Remote; USD 120,000 - 165,000; Full time

Job summary

York Solutions, LLC is seeking an experienced Senior .NET Software Engineer to support a large-scale healthcare document and payments platform. This role centers on hands-on C#/.NET development, maintaining and enhancing enterprise applications, building APIs, and supporting SQL Server environments.

The ideal candidate will work across modern and legacy .NET technologies, troubleshoot complex backend systems, and contribute to a mature, enterprise codebase.

Qualifications

• 3+ years of professional C#/.NET development experience.
• Experience with .NET Framework and .NET Core.
• Strong SQL Server skills, including stored procedures, database design, queries, and performance optimization.
• Experience with ASP.NET, Web API, and IIS-hosted applications.
• Experience working within AWS environments.
• Ability to troubleshoot complex backend application logic and work effectively in established enterprise codebases.
• Familiarity with Git, Visual Studio, unit testing, and collaborative development workflows.

Responsibilities

• Develop and maintain C# applications using .NET Framework 4.8 and .NET Core.
• Build, enhance, and troubleshoot ASP.NET applications, Web APIs, WCF services, and IIS-hosted solutions.
• Write and optimize SQL Server queries, stored procedures, database schemas, and data-processing logic.
• Develop and maintain background processing jobs, integrations, and multithreaded applications.
• Troubleshoot issues across application, API, database, and file-processing layers.
• Support applications operating within AWS environments.
• Participate in code reviews, unit testing, Git-based development, and production support.
• Collaborate with engineers to deliver enhancements to healthcare document and payment-processing systems.

Skills

C#/.NET

.NET Framework

.NET Core

ASP.NET

Web API

WCF

SQL Server

IIS

Git

Visual Studio

Unit testing

Tools

SSDT

SSMS

AWS

Visual Studio

Job description

York Solutions, LLC is seeking an experienced Senior .NET Software Engineer to support a large-scale healthcare document and payments platform. This role centers on hands-on C#/.NET development, maintaining and enhancing enterprise applications, building APIs, and supporting SQL Server environments.

The ideal candidate will work across modern and legacy .NET technologies, troubleshoot complex backend systems, and contribute to a mature, enterprise codebase.