My client is seeking a highly experienced Senior C#.NET SQL Developer to join their team based in Randburg, Johannesburg (Hybrid – primarily remote with occasional office visits as required). This is an opportunity to work in a mature, technically driven environment where deep engineering expertise and problem-solving excellence are highly valued.

You’ll play a key role in building, optimising, and maintaining robust systems that support critical business operations, while also contributing to modernisation and performance improvements across the stack.

Requirements:

·        Minimum of 10 years’ experience programming in C#, .NET and SQL, with at least 5 recent years of daily hands-on coding.

·        Strong understanding of relational databases, design, and T-SQL (stored procedures, triggers, views, indexes, constraints, foreign keys).

·         Experience with SSIS, SSRS, and Excel (with VBA) over the past 3 years.

·        Proven ability to optimise SQL queries and stored procedures using query analyser tools.

·        Experience with AI coding tools (Claude etc.) to improve development speed and quality.

·        Solid general programming skills, with exposure to C#, .NET Core, ASP.NET, Blazor, Razor Pages.

·        Web development experience with HTML, CSS, JavaScript/TypeScript, RESTful APIs, and SOAP Web Services.

·        Advantageous: CLR development for SQL Server, Python (AI, APIs, automation), Linux, Asterisk, Node Red, and other SQL databases (MySQL, PostgreSQL).

·         Strong problem-solving ability, logical reasoning, and business process understanding.

·        Excellent communication skills and ability to work collaboratively in a remote-first team.

If you would like to apply for this position, please send transcripts with applications.

Should you meet the requirements for this position, please email your updated CV attached to it.jobs@tumaini.co.za,  alternatively contact XXX-XXXX or visit our website, www.tumaini.co Correspondence will only be conducted with short listed candidates. Should you not hear from us within 3 days, please consider your application unsuccessful.