Senior .NET Modernization Engineer: Oracle to PostgreSQL

OpsBrasil Serviços Cloud LTDA; United States; Remote; USD 124,000 - 179,000; Full time

Job summary

United States Digital Space LLC seeks an experienced software engineer to modernize legacy .NET Framework applications and data tiers. The project migrates from Oracle to PostgreSQL on AWS EC2/RDS, updating the application layer for PostgreSQL as the backend.

You will rewrite data access and integrate with CI/CD pipelines while maintaining production stability. Responsibilities include designing a realistic modernization plan, porting legacy ADO.NET/EF code, and mentoring mid-level developers.

Qualifications

• 10+ years of professional software development experience with C# and .NET.
• Strong knowledge of .NET Framework 4.8 and legacy stack (ASP.NET MVC/Web API, Web Forms, WCF, IIS, Windows Services).
• Experience modernizing or migrating existing applications, not just greenfield development.

Responsibilities

• Assess existing .NET Framework applications and produce a modernization plan.
• Modify application code to support PostgreSQL as backend.
• Port data access layers to current patterns and migrate Oracle to PostgreSQL.
• Write tests for legacy behavior and integration tests across data tier.

Skills

C# programming

NET Framework 4.8

ASP.NET MVC

Web API

Web Forms

WCF

IIS

Windows Services

Oracle PL/SQL

PostgreSQL

PL/pgSQL

SQL

Git

CI/CD

AWS (EC2, RDS)

Tools

Azure DevOps

GitHub Actions

Job description

United States Digital Space LLC seeks an experienced software engineer to modernize legacy .NET Framework applications and data tiers. The project migrates from Oracle to PostgreSQL on AWS EC2/RDS, updating the application layer for PostgreSQL as the backend.

You will rewrite data access and integrate with CI/CD pipelines while maintaining production stability. Responsibilities include designing a realistic modernization plan, porting legacy ADO.NET/EF code, and mentoring mid-level developers.