Senior C# .NET Developer: WinForms & APIs

ATS Client; Johannesburg; On-site; ZAR 720,000 - 880,000; Full time

Job summary

ATS Client in Johannesburg is seeking a Senior C# Developer to join a dynamic team responsible for delivering and maintaining mission-critical business applications across desktop, web, database, and integration layers.

The role covers greenfield development and enhancement of existing systems, emphasizing clean code, problem solving, and robust solutions with modern .NET technologies such as ASP.NET Core, EF Core, and RESTful APIs, alongside WinForms and DevExpress as needed.

Qualifications

• Strong experience with C# and .NET framework development.
• Experience building desktop and web applications with ASP.NET Core and Web APIs.
• Solid understanding of OOP and SOLID principles; WinForms experience is essential.

Responsibilities

• Develop and maintain mission-critical business applications across desktop, web, and integration layers.
• Design and implement RESTful APIs and integrate with third-party systems.
• Ensure code quality with CI/CD and Git best practices.

Skills

C# / .NET

OOP / SOLID

WinForms

ASP.NET Core / Web APIs

Entity Framework / EF Core

LINQ

NuGet

Blazor Server

SQL Server / Database

Tools

DevExpress

Microsoft Fluent UI

Job description

ATS Client in Johannesburg is seeking a Senior C# Developer to join a dynamic team responsible for delivering and maintaining mission-critical business applications across desktop, web, database, and integration layers.

The role covers greenfield development and enhancement of existing systems, emphasizing clean code, problem solving, and robust solutions with modern .NET technologies such as ASP.NET Core, EF Core, and RESTful APIs, alongside WinForms and DevExpress as needed.