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

Requirements

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)