Senior .NET Architect & Backend Engineer - Hartford On-Site

Sage IT; Hartford (CT); On-site; USD 150,000 - 190,000; Full time

Job summary

Sage IT in Hartford, CT is seeking a senior .NET Developer to drive advanced architecture, backend engineering, and enterprise application design on-site. You will own C#, .NET Core, ASP.NET, microservices, and SQL Server related development for high-availability systems.

With 12+ years of hands-on experience, you will lead technical decisions, review code, mentor junior engineers, and collaborate across cross-functional teams to deliver scalable solutions.

Qualifications

• 12+ years of progressive professional hands-on experience in .NET software development and enterprise architecture.
• Strong experience with C#, .NET Core, ASP.NET and Web API development.
• Hands-on experience with SQL Server, relational design, and ORM frameworks.
• Understanding of microservices, cloud deployment, and CI/CD pipelines.
• Ability to debug complex enterprise software, write unit tests, and optimize performance.
• Excellent communication and stakeholder management skills.

Responsibilities

• Design, develop, test, and deploy scalable enterprise-grade applications using C#, .NET Core, and ASP.NET.
• Architect and implement high-performance RESTful APIs, microservices, and distributed cloud services.
• Optimize database performance and data access layers with SQL Server and Entity Framework.
• Conduct code reviews, unit testing, integration testing, and performance profiling.
• Collaborate with cross-functional teams including product management and QA.
• Mentor junior engineers and contribute to architectural roadmap and best practices.

Skills

C#

NET Core

ASP.NET

Web API

SQL Server

Microservices

CI/CD

Unit testing

Mentorship

Security

Education

Bachelor’s or Master’s in Computer Science/Software Engineering/IT

Tools

Docker

Kubernetes

Git

Entity Framework

Jira

Confluence

Job description

Sage IT in Hartford, CT is seeking a senior .NET Developer to drive advanced architecture, backend engineering, and enterprise application design on-site. You will own C#, .NET Core, ASP.NET, microservices, and SQL Server related development for high-availability systems.

With 12+ years of hands-on experience, you will lead technical decisions, review code, mentor junior engineers, and collaborate across cross-functional teams to deliver scalable solutions.