React Js Developer - Technical Lead managing projects in front - end development with strong skills in React and Java. Collaborating with cross - functional teams overseeing application development in a fast - paced environment.
About the role
- Senior Front-End Engineer developing complex user interfaces for a deep-tech company's AI platform. Leading front-end architecture with high performance and interactive data visualizations.
Responsibilities
- Lead development of our front-end framework using React or Svelte with a focus on strict TypeScript implementation
- Architect and build graph-based workflow editors that handle complex interactivity (panning, zooming, node connection)
- Implement high-performance data visualizations using d3.js, maintaining 60fps performance even with streaming data
- Design secure authentication and session management flows using JWT and modern security best practices
- Optimize client-side performance for scientific calculations, utilizing Web Workers to offload heavy computation from the main thread
- Establish front-end standards, automated testing practices, and long-term architectural guidelines
- Partner with backend engineers to define clean, stable API contracts and real-time data synchronisation strategies
Requirements
- 5+ years of experience building and shipping production-grade front-ends for data-intensive applications
- Deep mastery of TypeScript and modern UI frameworks (React or Svelte)
- Proven experience building complex, interactive visualizations using d3.js or similar libraries (Canvas/WebGL experience is a strong plus)
- Demonstrated ability to handle complex state management outside of standard framework hooks (e.g., experience with Zustand, MobX, XState, or similar)
- Experience handling real-time data streams (WebSockets, SSE) and optimizing UI updates for high-frequency data
- Strong understanding of client-side security, specifically regarding JWT handling and storage
- Strong architectural thinking and comfort working in early-stage environments
Job title
Job type
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Degree requirement
Tech skills
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