Senior Frontend Developer

Location

Cape Town (Claremont) – Hybrid, 3 days in office per week

We are seeking a Senior Frontend Developer with a strong technical background and a passion for real-world problem solving. You will be part of creating a reliable, low latency athlete-and-ball tracking system. Our client's products are used in training sessions, live TV broadcasts, augmented reality experiences, and officiating, so enthusiasm for new greenfield technology is a must.

• Deep expertise in React (including hooks, context, state management solutions like Redux/Zustand, and performance profiling).
• We will consider developers with strong expertise in other frontend frameworks (e.g. Angular/Vue),
  but solid React competency is preferred and strong Type Script experience is mandatory.
• Strong experience with frontend testing at multiple levels (unit with Jest + React Testing Library, integration/end-to-end with Cypress or Playwright, visual regression, and component testing strategies).
• Proven track record working with RESTful APIs, complex asynchronous data flows, real-time updates (Web Sockets, Server-Sent Events), data fetching/caching strategies (e.g. Tan Stack Query / SWR / Apollo), and error handling/resilience patterns.
• Advanced proficiency with Git workflows (including rebase, cherry-pick, large-scale refactoring), modern CI/CD pipelines, and frontend-specific build tooling/performance optimization (Webpack/Vite/Rollup, bundle analysis, lazy loading, code splitting).
• Cloud experience, either AWS or GCP.
• Experience in building Electron applications.
• Experience architecting scalable, maintainable frontend systems and making technology decisions that impact long-term project health.

• Hands-on experience with real-time data visualization libraries (e.g. D3.js, Three.js, Babylon.js, Chart.js with advanced customization, or WebGL-based rendering).
• Familiarity with NX or similar build platform.
• Prior work in sports technology, wearable devices, performance analytics, IoT data streams, or high-throughput real-time dashboards.
• Familiarity with design systems architecture, component libraries, monorepos.
• Exposure to React Native.
• Exposure to Next.js / Remix / SSR/SSG patterns, progressive web apps (PWAs), or Web Assembly integration.

As part of their engineering team:

• Lead the design, architecture, and implementation of high-performance, accessible, and scalable web interfaces for our sports technology products.
• Partner closely with product managers, designers, and backend engineers to refine ambiguous requirements, define technical approaches, and deliver impactful features from concept through production.
• Own and evolve complex data visualization experiences that enable athletes, coaches, and analysts to derive actionable insights from performance metrics in real time.
• Write exemplary, maintainable code while championing best practices (clean code, SOLID principles adapted to frontend, performance budgets, accessibility standards).
• Conduct thorough code reviews, provide constructive technical guidance, and mentor mid-level and junior engineers to accelerate team growth.
• Drive continuous improvement of UI/UX quality, design system consistency, frontend tooling, and developer experience across platforms.
• Identify and resolve technical debt, optimize application performance (rendering, load times, memory usage), and ensure reliability at scale.
• Lead or significantly contribute to major frontend initiatives, migrations (e.g. framework upgrades, Type Script adoption), or architectural decisions.