Johannesburg: Intermediate .NET Developer

We are looking for an experienced and driven Intermediate .NET Developer with strong backend expertise and solid exposure to the Microsoft Azure ecosystem. In this role, you’ll design, build, and enhance robust application services, contribute to cloud-native architectures, and support complex integrations across distributed systems. Working within Agile delivery teams, you’ll play a key role in developing secure, high-performing solutions that leverage C#, .NET, Azure Functions, and modern data platforms, while collaborating closely with stakeholders to deliver meaningful business outcomes. What you’ll do: Design, develop, and enhance scalable backend services and cloud-native applications using C# and .NET within the Microsoft Azure ecosystem. Build and maintain Azure Functions to support event-driven processing and system integrations. Develop and optimise RESTful APIs, ensuring secure authentication (OAuth, API keys, token-based authentication) and seamless third-party integrations. Work extensively with Azure Cosmos DB (Postgres API) and PostgreSQL, writing efficient SQL queries and ensuring data integrity and performance. Contribute to system design discussions, technical improvements, and best practices to ensure clean, maintainable, and high-performing code. Collaborate within Agile/Scrum teams, participating in sprint planning, code reviews, and continuous improvement initiatives. Support CI/CD processes using Azure DevOps, ensuring reliable deployments and high-quality releases. Your expertise: 3–5 years of professional software development experience, with strong exposure to backend and integration-focused environments. Solid proficiency in C#, .NET / .NET Core, and building RESTful APIs. Hands-on experience with Azure services, particularly Azure Functions and cloud-based application development. Strong understanding of relational databases, specifically PostgreSQL and Azure Cosmos DB (Postgres API). Experience integrating with third-party systems and working with authentication standards such as OAuth and token-based security. Exposure to CI/CD pipelines, Git version control, and Agile delivery methodologies. Strong analytical thinking, problem-solving capability, and the ability to work independently while contributing effectively to a team. Experience with NetSuite integrations will be advantageous. Qualifications required: Degree, diploma or similar in Computer Science or related experience Other information applicable to the opportunity: Contract position Location: Johannesburg Why work for us? Want to work for an organization that solves complex real-world problems with innovative software solutions? At iOCO, we believe anything is possible with modern technology, software, and development expertise. We are continuously pushing the boundaries of innovative solutions across multiple industries using an array of technologies.  You will be part of a consultancy, working with some of the most knowledgeable minds in the industry on interesting solutions across different business domains.  Our culture of continuous learning will ensure that you will have all the opportunities, tools, and support to hone and grow your craft.  By joining IOCO you will have an open invitation to developer inspiring forums. A place where you will be able to connect and learn from and with your peers by sharing ideas, experiences, practices, and solutions.  iOCO is an equal opportunity employer with an obligation to achieve its own unique EE objectives in the context of Employment Equity targets. Therefore, our employment strategy gives primary preference to previously disadvantaged individuals or groups.