Senior .NET Engineer / Application Modernization Engineer | Remote Contract Opportunity | Fastwater Staffing

Job Description

?? **Location:** Fully Remote (Maryland, U.S.)

?? **Employment Type:** Contract

?? **Start Date:** Immediate

?? **Compensation:** **TBD -- based on skills and experience**

**Important Screening Requirements**
====================================

Due to client security requirements, candidates **must be U.S. Citizens or U.S. Permanent Residents (Green Card holders)** authorized to work in the United States without current or future visa sponsorship.

* Must be willing to support and work with a government client.
* Must be willing to undergo fingerprinting as part of the onboarding process.
* Must successfully complete a government background investigation (CJIS-type clearance).

**About the Role**
==================

We are seeking a **Senior .NET Engineer / Application Modernization Engineer** to lead the modernization of enterprise applications and legacy systems. In this role, you will design, develop, and modernize .NET applications, migrate legacy platforms to modern architectures, and build scalable, cloud-native solutions. The ideal candidate has extensive experience with .NET development, application modernization, cloud integration, and large-scale migration initiatives.

**Key Responsibilities**
========================

* Design, develop, and maintain enterprise applications using **C#** and **ASP.NET**.
* Modernize legacy **.NET Framework** applications to **.NET Core / .NET 8**.
* Develop and maintain **RESTful APIs** and microservices-based applications.
* Design and integrate solutions with **SQL Server** and other relational databases.
* Lead application modernization and legacy system migration initiatives.
* Develop cloud-native applications and integrate solutions with AWS services.
* Modernize legacy **WebForms** applications and redesign database-heavy solutions.
* Support **SSIS** migration and application redesign efforts.
* Optimize application performance through code refactoring and architectural improvements.
* Collaborate with cross-functional teams to deliver scalable, secure, and high-quality software solutions.

**Required Qualifications**
===========================

* **5+ years** of experience in **.NET application development**.
* Strong hands-on experience with:

* C# and ASP.NET

* .NET Framework modernization to .NET Core / .NET 8

* REST APIs and microservices architecture

* SQL Server development and database integration

* Application modernization and legacy system migration

* Cloud-native application development and AWS integration
* Experience working on large-scale modernization projects involving:

* Legacy WebForms applications

* Stored procedures and database-heavy applications

* SSIS migrations and redesign efforts
* Strong understanding of software architecture, performance optimization, and code refactoring.

### **Preferred Qualifications**

* Experience with AWS application development or cloud migration projects.
* Experience migrating SQL Server workloads to **PostgreSQL** or **Amazon Aurora PostgreSQL**.
* Experience supporting enterprise-scale application modernization initiatives.