IT/Computer - Development Johannesburg FULL TIME Job Summary Senior SQL Developer (JHB) IT - Software Development Johannesburg - Gauteng - South Africa 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. DUTIES: * 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-solvingwhile maintaining full ownership and understanding of the final solution. REQUIREMENTS: * A minimum of 10 years using and programming in C#, .NET and SQL. * At least 5 of the most recent years using and programming in C#, .NET and SQL daily. * A good understanding of SSIS, SSRS and Excel working with SQL Server over the past 3 years. * Solid understanding of relational databases and database design. * Excellent knowledge of the T-SQL language including use of stored procedures, triggers, views, data types, keys indexes, constraints, foreign keys, relational design and the related tools and development environments. * Experience optimising SQL Server queries and stored procs and the use of query analyzer for tuning code. * Very good general programming skills and a general interest in programming and development using primarily SQL Server and C# and the .NET platform. * Demonstrated experience using AI tools to enhance development speed and quality. Ability to balance AI-generated assistance with strong personal judgment and deep technical understanding. * Very good Excel skills as well as a good working knowledge of VBA programming in Excel. * Sound knowledge of secure development principles. * Knowledge of SQL environment using tracing tools. * Experience with Python in the context of AI, APIs, or automation is a strong advantage. * Web development experience using MVC and the following technologies: ASP.NET / .NET Core / Razor pages / Blazor. * Knowledge and experience working with HTML, CSS and JavaScript/Typescript. * Web Service development using .NET. * Use of and RESTful APIs. * Use of SOAP Web Services. * Very logical with good understanding of basic Mathematics and Statistics. Advantageous * Experience with other SQL databases like MySQL and PostgreSQL. * CLR development for SQL Server using C#. * Experience with Node Red. * Some Linux and Asterisk experience. ATTRIBUTES: * A strong sense of responsibility and ownership and a solid work ethic this is very important! * Accurate and precise approach with a strong sense of attention to detail. * The ability to work independently and as part of a team. * A willingness to learn about the existing business and systems enabling participation in the improvement and further development of these systems. * A willingness to keep learning and staying updated on modern development environments, techniques and trends like the latest ASP.NET developments as well as ML.NET. * Very good verbal and written communication skills with the ability to adapt to communicating with senior technical team, management and non-technical call centre agents. * Very good problem-solving skills and an aptitude for applying critical reasoning and logic to solve challenging business problems. * Organised and task driven with a need to complete tasks well. Apply for this Job Datafin Recruiter