Senior Web Developer

Sabenza IT & Recruitment; Pretoria; On-site; ZAR 800,000 - 1,200,000; Full time

Job summary

A technology recruitment firm is seeking an experienced Senior Web Developer in Pretoria. The role focuses on modernising complex web applications, requiring strong skills in .NET C# and extensive front-end development experience. Candidates should have at least 10 years in web technologies, including JavaScript, Angular, and SQL Server. Responsibilities include enhancing existing systems, refactoring code, and producing documentation, ensuring high performance and reliability of applications.

Qualifications

• 5 years’ experience as a Senior Web Developer in a multi-tiered .NET application environment.
• 10 years experience as a Front-End Developer.
• Strong proficiency in .NET C#.

Responsibilities

• Maintain and enhance existing functionality.
• Refactor and modernise codebases.
• Produce clear technical documentation.

Skills

.NET C#

Front-End Development

JavaScript/TypeScript

Angular

ASP.NET

HTML5

React

SQL

API Testing

Education

Relevant tertiary qualification in IT or Computer Science

Matric with 8-10 years experience

Tools

SoapUI

Postman

Job description

Senior Web Developer – Pretoria

We are looking for an experienced Senior Web Developer with a strong front‑end and .NET skill set to join our high‑energy team in Pretoria. This role focuses on modernising, optimising, and future‑proofing complex, high‑stakes web applications used by millions of South Africans each year.

Responsibilities

• Maintain and enhance existing functionality, while designing and developing new components to support evolving business needs.
• Develop a deep understanding of the current product architecture and business domain, collaborating with business analysts to refine requirements and implement high quality solutions.
• Refactor, optimise, and modernise codebases to ensure long‑term maintainability, scalability, and adaptability to future requirements.
• Assess and improve application performance, reliability, and high availability capabilities across all environments.
• Create comprehensive unit tests and integrated system tests to validate that new and existing functionality operates as intended and support functional testing during development.
• Produce clear and detailed technical documentation outlining system architecture, components, and operational guidelines.
• Conduct in depth root cause analysis (RCA) to identify and resolve defects within complex, integrated systems.
• Build, package, and deploy applications onto application servers or cloud platforms, ensuring smooth and reliable release cycles.
• Collaborate effectively within a multidisciplinary team, contributing to continuous improvement of development standards, practices, and processes.

Requirements

• Relevant tertiary qualification in Information Technology, Computer Science, Engineering, or a related field (or Matric with more than 8‑10 years of hands‑on development experience within a custom software development environment, with multiple production releases per year).
• Strong proficiency in .NET C#, with proven expertise in developing enterprise‑grade web applications. VB an advantage.
• A minimum of 5 years’ experience as a Senior Web Developer in a multi‑tiered .NET application environment.
• At least 10 years of experience as a Front‑End Developer.
• Practical experience with modern web technologies, including JavaScript/TypeScript, Angular, ASP.NET, HTML5, and React.
• Solid understanding of RESTful frameworks, with experience working with JSON and XML‑based data exchange.
• Solid experience with SQL and relational database development, specifically Microsoft SQL Server (2008 and later) and Azure SQL.
• Proficient in API testing and validation using SoapUI and Postman.