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