Frontend Engineer

Your Challenge The Frontend Engineer is to build and improve web applications used by the Forecasting and Replenishment (FNR) team. This role focuses on creating reliable, fast, and easy-to-use interfaces for business users managing replenishment parameters, reviewing order proposals, monitoring exceptions, and taking action. You will work closely with Backend Engineers, Product, and business stakeholders to deliver production-grade features that have real operational impact. Build and maintain React applications using TypeScript with strong attention to usability, performance, and maintainability. Implement end-to-end user workflows for FNR systems (for example parameter setup, proposal review and approvals, dashboards, and exception handling). Collaborate with Backend Engineers to design and consume APIs effectively, including pagination, filtering, search, and error handling. Translate requirements into clean UI architecture: reusable components, predictable state management, and consistent UX patterns. Build data-heavy screens including tables, filters, forms, charts, and drill-down views with a strong focus on clarity and speed. Implement role-based access and authentication flows as required by internal systems. Ensure high quality through testing, code reviews, and disciplined release practices. Improve frontend developer experience: component standards, documentation, performance budgets, and reducing UI regressions. Work with stakeholders to iterate quickly through demos and feedback loops, while keeping the UI stable and consistent. Requirements Strong experience with TypeScript and React in production environments.Solid understanding of HTML, CSS, responsive layout, and modern browser behavior. Experience building complex, data-driven interfaces (tables, forms, filters, CRUD flows, dashboards). Experience integrating with REST APIs and handling client-side concerns such as loading states, caching, retries, and error messaging. Good understanding of frontend architecture concepts such as component design, state management patterns, and code organization. Familiarity with frontend testing practices (unit tests and integration tests) and ability to write maintainable tests. Strong debugging skills and ability to diagnose issues across UI, network, and API layers. Clear communication and collaboration skills, able to work with engineers and non-technical stakeholders. Experience with common React ecosystem tools such as React Query, Redux Toolkit, Zustand, or similar state/data management libraries.Experience with UI component libraries (Material UI, Ant Design, Chakra UI, or similar) and designing reusable component systems. Experience building charts and analytics views (for example Recharts, Chart.js, ECharts, or similar) with correct data representation. Experience with performance optimization: bundle size reduction, memoization strategies, virtualized lists, and rendering profiling. Experience with accessibility best practices and UI quality standards. Familiarity with CI/CD pipelines for frontend projects and release automation. Experience working in supply chain, retail, or operations-heavy domains. Benefits Health Insurance - At Makro PRO, we care about your health! Group insurance from a top insurance company is included in your benefits—OPD, IPD, Emergency OPD Provident Fund - Makro PRO cares about your long-term plan! We offer 3% provident fund. Year-end bonus - We include variable and performance bonus for our employees. Gym Facilities - Our Head office has a fitness center, yoga room, and recreational space. Enjoy Bangkok scenery and work your body! Attractive Vacations days - Enjoy our attractive annual leave. Let's say the minimum is 18 days! No overtime - We work 5 days a week with. We set our own goals and deadlines. Cool hardware - New MacBook. The tool to help you be the best of yourself. Free car parking space - No more stress or extra cost if you drive to work. We offer free parking space for our employees. Best Culture Clear focus.Diverse Workplace (Our members are from around the world!)Thai and Non-Thai are both welcome!Non-hierarchical and agile environmentGrowth opportunity and career path