Are you a senior engineer who enjoys building modern systems, shaping architecture, and having real influence over how software is built? We are looking for a high-impact senior software developer for a South African organisation that is transforming its core digital platform. This role offers the chance to work across cloud, backend, and frontend technologies, while helping define engineering standards and technical direction in a growing, forward-thinking team. This business plays a key role in South Africa's renewable energy transition and is a market leader in this industry. In this role, you will: Design and build scalable backend services using C#/.NET and Node.js Develop and maintain modern web applications using React / Next.js Build and consume secure APIs and integrate with identity and third-party services Work with AWS to deliver cloud-native, event-driven solutions Support sales and contact-centre integrations, including Amazon Connect Improve system reliability, performance, and observability Contribute to architecture decisions, technical standards, and best practices Mentor other engineers and help raise overall code quality What we are looking for: Strong senior-level experience with C#/.NET and TypeScript Hands‑on experience building systems on AWS Experience with microservices and event‑driven architecturesSomeone comfortable taking ownership and influencing technical decisions A pragmatic engineer who values clean, maintainable code Reference Number MAT60981 - Permanent position based in Johannesburg. Salary up to R960K per annum depending on experience and ability. Contact Mavis at or call to discuss this and other opportunities. #J-18808-Ljbffr