React Developer

4 days ago

Rosebank, Gauteng, South Africa Cartrack Full time

We're looking for a skilled React Developer with strong experience across .NET, JavaScript/TypeScript, PHP, and IoT platforms to join our innovative technology team. You'll play a key role in building and enhancing our connected systems, integrating real-time data from IoT devices into scalable web platforms used across multiple markets, and helping shape the front-end architecture and UX of our telematics products.

Key Responsibilities

  • Developing and maintaining responsive front-end applications using React (functional components, hooks), JavaScript/TypeScript, HTML5 and CSS3.
  • Integrating front-end applications with .NET (C#) and PHP back-end services and RESTful APIs.
  • Working with IoT data streams, telematics platforms, and real-time dashboards to present telemetry and analytics.
  • Designing and implementing state management solutions (e.g., Redux, Context API) and client-side caching strategies.
  • Optimizing application performance, load time, accessibility, scalability, and security for web and progressive web app (PWA) scenarios.
  • Building testable code and writing unit/integration tests (Jest, React Testing Library) and participating in CI/CD pipelines.
  • Troubleshooting, debugging, and enhancing existing web applications and fixing production issues when they arise.
  • Collaborating closely with system engineers, product managers, backend teams, and UX designers to design end-to-end solutions.
  • Staying up to date with emerging front-end technologies and best practices in web and IoT development and proposing continuous improvements.

Requirements

  • 3–5+ years of professional experience as a Front-End or Full-Stack Developer, with demonstrable React experience.
  • Strong proficiency in React (hooks & functional components), JavaScript/TypeScript, HTML5, CSS3, and REST APIs.
  • Hands-on experience with .NET (C#) and PHP back-end systems and integrating with these services.
  • Familiarity with IoT ecosystems, device communication protocols, and data visualization approaches for telematics.
  • Solid understanding of SQL/PostgreSQL databases and the flow of IoT data from devices to web applications.
  • Experience with version control (Git), Agile methodologies, and CI/CD tooling (pipelines, automated builds/tests).
  • Excellent problem-solving, debugging and analytical skills, and a pragmatic approach to delivering production-ready features.

Preferred Skills

  • Exposure to real-time tracking, vehicle telematics, or connected devices and domain knowledge of fleet/asset tracking.
  • Understanding of MQTT, WebSockets, or similar IoT communication protocols for streaming data.
  • Experience with Redux, React Query / SWR, or other data fetching/state tools.
  • Familiarity with (or other SSR/SSG frameworks), PWA architecture, and mobile-friendly UI patterns.
  • UI/UX awareness and the ability to build clean, user-friendly interfaces with attention to accessibility and responsive design.
  • Experience with front-end performance profiling and browser debugging tools.

Soft Skills

  • Strong sense of ownership, integrity, and accountability for delivering high-quality solutions.
  • Ability to work effectively under pressure, meet deadlines, and prioritise work in a fast-moving environment.
  • Excellent communication and collaboration skills — comfortable working across engineering, product, and stakeholder teams.
  • Passionate about innovation, connected technology, and smart mobility solutions.

Job Type: Full-time

Ability to commute/relocate:

  • Rosebank, Gauteng: Reliably commute or planning to relocate before starting work (Preferred)

Experience:

  • React: 3 years (Preferred)
  • React Native: 3 years (Preferred)
  • .NET: 3 years (Preferred)
  • JavaScript: 3 years (Preferred)
  • PHP: 3 years (Preferred)

Location:

  • Rosebank, Gauteng (Preferred)

Work Location: In person

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