Senior Software Engineer - C#/.NET & API Modernization

OpenKrill; United States; Remote; USD 120,000 - 150,000; Full time

Job summary

Tech Holding is seeking a Senior Software Engineer with strong C#/.NET and Angular experience to build, integrate, and modernize software systems. You will troubleshoot production issues and deliver reliable solutions in complex environments with limited documentation.

The role emphasizes building adapters, enabling integrations, and incremental modernization while minimizing disruption to existing systems. Collaboration with engineering teams is essential.

Qualifications

• Strong hands-on experience with C# and .NET development.
• Experience building Angular applications.
• Experience designing, developing, and integrating REST APIs.
• Solid SQL Server knowledge and performance troubleshooting.
• Proficiency with TypeScript and Node.js.
• Experience implementing automated tests.

Responsibilities

• Develop, maintain, and enhance applications using C#/.NET and Angular.
• Troubleshoot SQL Server queries and production performance issues.
• Build and integrate REST APIs and system-to-system integrations.
• Develop adapters and incremental replacement capabilities to modernize existing systems.
• Work across TypeScript and Node.js codebases to support integrations.
• Implement automated tests to improve code quality and reliability.
• Investigate and resolve production issues with limited documentation.
• Deliver incremental improvements while protecting existing functionality.

Skills

C#/.NET

Angular

SQL Server

REST APIs

TypeScript

Node.js

Automated testing

Production troubleshooting

Integration adapters

Job description

Tech Holding is seeking a Senior Software Engineer with strong C#/.NET and Angular experience to build, integrate, and modernize software systems. You will troubleshoot production issues and deliver reliable solutions in complex environments with limited documentation.

The role emphasizes building adapters, enabling integrations, and incremental modernization while minimizing disruption to existing systems. Collaboration with engineering teams is essential.