Senior C#/.NET Developer (JHB)

Saratoga; Johannesburg; Hybrid; ZAR 600,000 - 800,000; Full time

Job summary

A leading South African technology company is seeking a Senior C#/.NET Developer to join their innovative team. This hybrid role requires experience in developing web-based applications and managing existing code. Ideal candidates should have a strong background in C#, .NET frameworks, and RESTful APIs. The position is primarily based in Fourways, Gauteng, with opportunities for remote work. Competitive salary and growth opportunities offered.

Qualifications

• 5+ years of experience in designing and building web-based applications.
• Proficient in writing complex SQL queries and performance tuning.
• Hands-on experience with API documentation tools.

Responsibilities

• Develop and document design and code.
• Run tests and fix bugs.
• Design and develop technical solutions for enterprise-level projects.

Skills

C# and .NET framework

ASP.NET

Entity Framework

Microsoft SQL Server

RESTful APIs

Git

Agile development methodologies

Education

3- or 4-year degree/diploma in Computer Science or Software Engineering

Tools

Swagger/OpenAPI

Azure DevOps

Job description

We are seeking an experienced Senior C#/.NET Developer to join our client’s innovative team in Fourways, Gauteng.

Our client is a leading South African technology company specialising in state-of-the-art GPS tracking and real-time telemetry solutions for managing high-value assets and fleets in complex, high-risk environments.

This is a hybrid role, requiring 2–3 days per week in their Fourways office. While preference is given to Johannesburg-based candidates, applicants from other regions are welcome, provided they are able to travel to Johannesburg for a few days each month or quarter as needed.

Key Responsibilities will include

· Technical architectural design

· Develop and document design, source code and technical architecture

· Maintain and manage existing source code

· Design, develop and implement solutions to users’ needs and requirements

· Review and improve code

· Run tests and fix bugs

· Develop technical solutions to complex business problems

· Design and develop technical solutions for enterprise-level projects

· Design and develop data analysis solutions

· Design and develop logical and physical data models that meet application requirements

· Design and develop continuous integration and continuous deployment pipelines

Qualifications and Experience required

· A relevant 3- or 4-year degree or diploma in Computer Science, Software Engineering, or related field (Honours or postgraduate qualifications preferred); alternatively, demonstrable equivalent practical experience.

· 5+ years’ experience in designing and building custom web-based applications using C# and the .NET framework (including .NET Framework 4.8 and .NET 8+ / .NET Core).

· Proficient in ASP.NET (MVC, Core, or Web Forms), Entity Framework, and Microsoft SQL Server, including writing complex queries, stored procedures, and performance tuning.

· Hands-on experience with RESTful APIs, Web Services (WCF and Web API), and API documentation tools such as Swagger/OpenAPI.

· Strong understanding of software architecture and design principles, including SOLID principles, layered architecture, and commonly used design patterns.

· Basic proficiency in front-end technologies such as HTML, CSS, JavaScript, Razor Pages, and an understanding of client-server interaction.

· Familiarity with unit testing and test-driven development (TDD) practices.

· Working knowledge of Git for source control and experience with DevOps tools, including build and release pipelines (e.g., Azure DevOps).

· Basic secure coding practices and security principles.

· Experience with agile development methodologies and collaborative team environments.

· Proven ability to initiate and deliver a project or solution end-to-end

Advantageous:

· Experience with GPS tracking, telemetry platforms, hardware integration, and mapping applications.

· Experience with Flutter/Dart for mobile app development, particularly integrating with .NET APIs.

· Prior exposure to the logistics industry

Personal Attributes:

· Able to mentor and review code for team members

· Strong problem-solving skills

· Good communication (both technical and non-technical)

POPI

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