Frontend Software Engineer (React / Next.js / TypeScript)

Responsibilities

• Develop, maintain, and optimize high-quality web applications using React, Next.js, and TypeScript to deliver exceptional user experiences.
• Build type-safe, reusable UI components with strong typing and interface design.
• Define and enforce TypeScript best practices, strict typing conventions, and shared type libraries across the frontend codebase.
• Integrate RESTful APIs and GraphQL services with fully typed request/response models.
• Collaborate closely with UI/UX designers to translate wireframes into production-ready code.
• Participate in code reviews with a strong focus on type safety, maintainability, and code quality.
• Identify and resolve performance bottlenecks, cross-browser compatibility issues, and ensure web performance optimization (Core Web Vitals).
• Work effectively within an agile team, participating in sprint planning, retrospectives, and daily stand-ups.
• Take full ownership of your work, treating TypeScript as a design tool to build robust architectures.
• Communicate clearly with technical and non-technical stakeholders in a fast-paced, collaborative on-site environment.

Qualifications

• At least 2–5 years of professional frontend development experience.
• Strong proficiency in TypeScript, including generics, utility types, discriminated unions, and strict mode.
• Hands-on experience with React.js (hooks, context, custom hooks) and Next.js (SSR, SSG, App Router).
• Solid understanding of HTML5, CSS3, and responsive design principles.
• Experience consuming RESTful APIs with typed data contracts and familiarity with Git version control (Bitbucket or GitHub).
• Experience with GraphQL and typed clients (Apollo, urql) is preferred.
• Knowledge of typed state management (Redux Toolkit, Zustand with TypeScript) is preferred.
• Familiarity with testing frameworks using TypeScript (Jest, React Testing Library, Cypress) is a plus.
• Understanding of CI/CD pipelines, deployment workflows, and familiarity with Docker for local development.
• Experience with monorepo setups (Turborepo, Nx) and managing shared TypeScript packages is a strong plus.
• A team player who cares deeply about code quality, performance optimization, and continuous improvement.
• Good command of both Thai and English.

Skills

• TypeScript: strict typing, generics, utility types
• React.js (hooks, context, custom hooks)
• Next.js (SSR, SSG, App Router)
• HTML5 & CSS3, responsive design
• RESTful APIs and typed data contracts
• GraphQL (preferred)
• Git (Bitbucket or GitHub)

Additional Information

• Work arrangement: on-site