# Hire a .NET developer to build and modernise your business applications

> Hire APPSOLN as your .NET developer to build ASP.NET Core applications and APIs in C#, or to modernise older .NET systems and move them to the cloud.

.NET is Microsoft's platform for business software, and many companies run their core systems on it. Hire APPSOLN to build new .NET applications, add features to existing ones, or upgrade older .NET Framework systems to modern .NET on Azure or AWS.

## What you get

- Modern ASP.NET Core applications and APIs
- Step-by-step upgrades from .NET Framework
- Connections to web front ends, CRMs, and ERPs
- Cloud hosting on Azure or AWS

## Typical projects

- New business applications and APIs in C#
- Upgrading older .NET Framework apps
- Moving .NET systems to Azure
- Adding a React front end to a .NET back end

## Skills and tools

- C#
- .NET
- ASP.NET Core
- SQL Server
- Azure
- React

## How it works

- **Tell us what you need.** Send a short message or book a free call. Describe the project, the deadline, and any existing code or systems.
- **Get a clear plan.** We reply with a proposed scope, approach, and timeline, or a smaller first step if that makes more sense.
- **Work starts.** You get regular updates and working results you can see, not just status reports.
- **Handover.** You own the code and documentation, and we can stay on for ongoing support if you want.

## Ways to work with us

- **A scoped project.** A fixed piece of work with an agreed outcome, such as a new app, a feature, or a migration.
- **Ongoing monthly help.** Regular development time for updates, fixes, and new features after launch.
- **A review or audit.** A short, focused look at your existing code or setup, with clear recommendations.

## Common questions

### Can you keep our old .NET system running while you upgrade it?

Yes. We upgrade in stages, so the system keeps working for your team throughout.

## Related

- [Full-Stack Development](https://appsoln.com/services/full-stack-development/index.md): Need a web app, customer portal, or internal tool that fits how your business works? APPSOLN builds it end to end, connects it to the tools you already use, and hands it over ready to launch.
- [.NET](https://appsoln.com/technologies/dotnet/index.md): .NET is Microsoft's platform for building business software, usually written in the C# language. Many companies run their core systems on it, and modern .NET works well in the cloud.
- [Microsoft Azure](https://appsoln.com/technologies/azure/index.md): Microsoft Azure is Microsoft's cloud platform. It works closely with Microsoft 365, Windows, and .NET, and it offers servers, databases, and AI services, including Azure OpenAI.
- [PostgreSQL](https://appsoln.com/technologies/postgresql/index.md): PostgreSQL is a popular, free, and very reliable database, the place where an app stores its information. It is trusted by startups and large companies alike.

Canonical page: https://appsoln.com/hire/dotnet-developer