Senior SQL Developer (JHB)

Environment

A dynamic Joburg-based Business Process Outsourcer seeks a forward-thinking Senior SQL Developer who sees AI not as a threat but as a powerful productivity enhancer. That leveraging tools like ChatGPT, Claude, or others to automate routine code writing, reduces boilerplate in turn means more focus on higher-value, business-critical logic. Forming part of the Operational Development team, you will help directly support the Call Centre - creating and maintaining solutions leaning heavily on SQL Server to query or manipulate data for the in-house developed systems and reports as well as using C# to create simple ASP.NET SPAs using MVC, Razor and Blazor. The ideal candidate will have worked on end-to-end solutions, able to see the bigger picture with 10 years’ experience using and programming in SQL, C# and .NET.

Responsibilities

• Solve business problems alone and as part of the team by applying good reasoning and logic to use one or more of the following technologies : ASP.NET, C#, Web services, Web APIs and SQL programming. ML.NET would be an advantage and part of the role moving forward.
• Support the deployment of new IT systems and infrastructure.
• Diagnose problems using a logical approach and understanding of the underlying systems.
• Work individually or as part of a team on small to medium sized SQL projects to solve operational business requirements as well as data manipulation when needed.
• Create ad-hoc queries or SQL Server stored procedures, views and jobs based on user requests or to maintain, troubleshoot or improve existing SQL functionality.
• Work on large data sets in a live transactional environment with an awareness of the impact of running demanding queries and the side effects on a busy operational call centre.
• Create and maintain constraints, keys and indexes to improve performance and maintain database integrity and business rules.
• Design and maintain Excel and SSRS reports using stored procedures and views.
• Maintain or improve existing Excel reports using VBA for extended functionality.
• Query and summarise data across multiple servers and databases using linked servers.
• Work with dynamic SQL to solve difficult cross-server and cross-database queries and summaries.
• Apply AI tools such as ChatGPT, Claude, or GitHub Copilot to assist with coding, testing, documentation, and problem-solving—while maintaining full ownership and understanding of the final solution.

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