Junior Backend Developer (.NET Core) – Build User Management & Task Features - Contract to Hire

Hi!

We are looking for a junior .NET Core backend developer to help me build a small web application. This is an hourly job, perfect for freelancers who are new to Upwork or want to gain experience with real projects.

About the project

We are building a simple customer management system. Users can:

• Create an account and log in
• Add, edit, or delete customer records
• View a list of all customers

The backend is built with .NET Core and connected to a SQL Server database.

What you’ll be doing

• Build and maintain API endpoints for user registration, login, and customer data
• Connect the APIs to the SQL database
• Test APIs with sample data to make sure everything works
• Fix small bugs and help with minor improvements

Who I’m looking for

• Someone with basic knowledge of C# and .NET Core
• Familiarity with SQL databases
• Ability to communicate clearly in English
• Willingness to follow instructions and learn

Nice-to-haves (not required)

• Knowledge of Entity Framework
• Basic Git skills
• Interest in learning cloud deployment (Azure/AWS)

Why this is a good opportunity

• Hourly work, flexible hours
• Clear and specific tasks (no guesswork)
• Good chance to build Upwork experience and get long-term tasks if you do well

How to apply

• Please briefly tell me your experience
• Include any small projects you’ve done, even personal or school projects