Principal C Net Engineer

Job Summary:

Seeking a highly experienced Principal C#/.NET Engineer to lead the modernization of a large legacy system into a clean, scalable, and high-performance .NET application. The role involves driving code refactoring, defining EF Core data architecture, optimizing APIs and batch processing, and ensuring delivery quality in a mission-critical environment.

• Refactor complex legacy-converted code into maintainable C#/.NET
• Lead Entity Framework Core design, optimization, and migrations
• Build and enhance ASP.NET Core Web APIs and service layers
• Improve performance, scalability, and code quality
• Define development standards and mentor engineers
• Ensure strong testing, CI/CD, and secure coding practices

• 10+ years in C# and .NET Core/.NET 6/7/8/10
• Strong expertise in EF Core, LINQ, async/await
• Experience with REST APIs, PostgreSQL, and software architecture
• Knowledge of Angular, TypeScript, Node.js
• Experience with testing frameworks, Git, SonarQube, Docker, CI/CD, and AWS

• Legacy modernization experience
• Mainframe and batch processing knowledge
• Performance tuning in large-scale systems
• Experience in regulated, high-accuracy environments

• Mission-critical environment requiring high delivery quality
• Strong emphasis on secure coding and testing practices
• In-person interview required

• 100% onsite for the first 30 days
• Then hybrid schedule: 3 days onsite / 2 days remote