Johannesburg: Senior React Front-End Engineer

Were looking for a Senior Front-End Engineer with deep React expertise to lead the design and delivery of high-quality, scalable user interfaces. Youll work closely with designers, backend engineers, and product managers to architect front-end systems, drive technical decisions, and ensure best-in-class performance, accessibility, and developer experience. This role is suited to someone who can independently lead complex features and initiatives from concept to production, mentor engineers, and shape the front-end architecture and standards across the product. Our successful Senior React Front-End Engineer will Lead front‑end architecture decisions, champion best practices, and drive consistency in patterns, tooling and code quality. Design and deliver complex, scalable user‑facing features, breaking down large problems into maintainable components. Architect reliable client/server state management solutions, define caching and real‑time update patterns, and collaborate effectively on API design. Uphold high-quality engineering by setting testing standards, strengthening CI/CD, and improving observability and debugging. Optimise performance across rendering, bundle size and Core Web Vitals, while ensuring strong accessibility and proactive improvements. Build scalable UI systems, evolve shared design systems, and maintain consistency across components, flows and user experiences. Lead incident triage, deep debugging and root‑cause analysis to improve reliability and resilience. Collaborate closely with product, design and backend teams, communicating trade‑offs, estimates and risks clearly. Mentor junior and intermediate engineers, supporting team growth and technical excellence. Drive refactoring, manage technical debt, oversee dependencies, and implement feature flags and rollout strategies for scalable delivery. If you have these qualifications, join our team: Matric, computer literacy (MS Office), strong numeracy, and excellent verbal and written English skills; plus 58 years of front‑end experience with 35 years in React, strong JavaScript (ES6) and TypeScript expertise, deep knowledge of React internals and performance optimisation, solid CSS and responsive design skills, experience with modern frameworks like Next.js or Vite, proven front‑end architecture capability, strong testing experience (Jest, RTL, E2E), API integration and design experience, and a solid understanding of accessibility and internationalisation. To apply, your written application must include: CV (maximum 4 pages), contactable references (with telephone numbers), and covering letter with three reasons why youre our top candidate for the job Only successful applicants will be contacted.