Senior .NET & Full-Stack Engineer - Hybrid (Long Island)

Gain America Inc.; New York, Northern (NY, KY); Hybrid; USD 120,000 - 150,000; Full time

Job summary

Gain America is seeking a Senior .NET / Full Stack Developer to own enterprise web applications on the Microsoft stack in the Long Island, NY market. You will build secure APIs and modern React front ends for high-traffic business systems, delivering end-to-end features.

Hybrid / on-site work with enterprise clients, collaborating with cross-functional teams. The role requires 5+ years shipping production software in C# / .NET, strong ASP.NET Core, Web API, EF, React/TypeScript, and hands-on

Qualifications

• 5+ years shipping production software in C# / .NET.
• Strong ASP.NET Core, Web API, and Entity Framework experience.

Responsibilities

• Build and maintain ASP.NET Core services and RESTful APIs for customer-facing applications.
• Develop responsive front ends in React/TypeScript against those APIs.
• Design and tune SQL Server schemas, queries, and stored procedures.
• Deploy and monitor workloads on Azure using App Services, Functions, and DevOps CI/CD.

Skills

C# / .NET

ASP.NET Core

React

TypeScript

Azure

Tools

Azure DevOps

SQL Server

Job description

Gain America is seeking a Senior .NET / Full Stack Developer to own enterprise web applications on the Microsoft stack in the Long Island, NY market. You will build secure APIs and modern React front ends for high-traffic business systems, delivering end-to-end features.

Hybrid / on-site work with enterprise clients, collaborating with cross-functional teams. The role requires 5+ years shipping production software in C# / .NET, strong ASP.NET Core, Web API, EF, React/TypeScript, and hands-on