Senior Frontend Dev English

Top 3 Reasons To Join Us Premium Healthcare package insurance 13th month salary, Performance bonus 16 days annual leave The Job Architect and build modern, high-performance web applications using TypeScript and React for trading analytics, execution workflows, and customer web portals. Design and implement interactive, low-latency dashboards and charts capable of processing and visualizing complex, high-volume market data. Integrate UI components with RESTful APIs, WebSockets, and Server-Sent Events (SSE) for seamless, live streaming data feeds. Optimize browser rendering performance, state management, and DOM manipulation to handle large datasets and high-frequency real-time updates smoothly. Build modular, accessible, and reusable component libraries to maintain design consistency across multiple web applications. Write comprehensive unit, integration, and end-to-end (E2E) automated test suites (e.g., Jest, React Testing Library, Playwright, Cypress) to catch UI regressions early. Focus on crafting clean, intuitive, and accessible user experiences that simplify complex financial workflows for non-technical users and external portal customers. Your Skills and Experience Strong mastery of TypeScript and modern React ecosystems (React, Next.js, modern state management like Zustand, Redux Toolkit, or Jotai). Hands-on experience integrating front-end applications with streaming data mechanisms ( WebSockets, SSE ) and REST APIs powered by modern backend services (Rust/Python). Deep understanding of browser rendering mechanics, memory leak detection, virtualized lists/tables for large datasets, and web performance optimization tools. Proven experience setting up and maintaining automated UI test suites for critical user flows and behavior verification. Comfortable working and developing within Linux-based desktop and build environments. Preferred Qualifications Experience with canvas/SVG charting libraries such as D3.js , Highcharts , Chart.js , Lightweight Charts , or visx . Familiarity with trading workflows, financial metrics, market data feeds, or fintech platform UI/UX patterns. Exposure to microservices or micro-frontend architectures for scaling large-scale web applications. Why You'll Love Working Here - Competitive salary and benefits including Premium Healthcare package insurance - 13th month salary, Performance bonus - 16 days annual leave - Comprehensive Training Courses (Languages, Technical and Soft-skill) - Language Certificate allowance (TOIEC and Japanese) - Lunar New Year gifts - Lunch and bus/ parking allowance - Fun team activities and outings - Sponsored happy hour and sport clubs - Comfortable work space and friendly colleagues