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Javascript/ReactJS Developer

Company: Ztek Consulting

Location: Bunghmun, London

Posted: June 19, 2026

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Position Details

Job Overview:

Javascript/ReactJS Developer


Key Responsibilities

  • Design, develop, and maintain high-performance front-end applications supporting trading, risk, and research workflows.
  • Build responsive, data-intensive UIs using ReactJS, JavaScript (ES6+), HTML/CSS, and the Browser API.
  • Implement real-time data visualization and interaction features optimized for low-latency environments.
  • Integrate seamlessly with backend systems via WebSockets and REST APIs to deliver live market data and trading updates.
  • Collaborate closely with KDB, Java, and Kafka engineers to ensure robust data flow and efficient UI–backend interaction.
  • Apply modern React design patterns (hooks, context, state management) to build scalable, maintainable components.
  • Conduct performance tuning, debugging, and profiling to ensure smooth operation under production trading loads.
  • Work directly with traders, q...