Senior C#/.NET Core Engineer — Multi-Tier Apps

ConsultNet Technology Services and Solutions; Longmont (CO); Hybrid; USD 83,000 - 96,000; Full time

Job summary

ConsultNet Technology Services and Solutions is seeking a C# Software Engineer III with deep experience in modern .NET Core to join a highly technical engineering team in Longmont, CO. The role emphasizes design, architecture, and delivering large-scale multi-tier applications across desktop and web environments.

The position is a long-term contract in a hybrid setting (Longmont, CO) with onsite presence 3x per week.

Qualifications

• 5+ years of experience with C# and modern .NET Core / .NET.
• Deep understanding of object-oriented programming (OOP).
• Experience with dependency injection and SQL Server.
• Experience with Entity Framework or similar ORM tools.
• Understanding of multi-tier architecture and enterprise-level applications.

Responsibilities

• Design, develop, and maintain applications using C# and modern .NET Core / .NET.
• Contribute to a complex, multi-tier architecture supporting desktop and web apps.
• Apply OO design principles to build scalable, maintainable systems.
• Implement dependency injection and modern architectural patterns.
• Collaborate on system design, architecture decisions, and performance improvements.
• Troubleshoot issues across layers and enhance reliability.

Skills

C#

.NET Core

OOP

Dependency Injection

SQL Server

Entity Framework

Multi-Tier Architecture

Desktop Application Development

MVC

Tools

Visual Studio

Job description

ConsultNet Technology Services and Solutions is seeking a C# Software Engineer III with deep experience in modern .NET Core to join a highly technical engineering team in Longmont, CO. The role emphasizes design, architecture, and delivering large-scale multi-tier applications across desktop and web environments.

The position is a long-term contract in a hybrid setting (Longmont, CO) with onsite presence 3x per week.