Senior Frontend Development Engineer (Enterprise Solutions)

About Appier

Appier is a software-as-a-service (SaaS) company that uses artificial intelligence (AI) to power business decision-making. Founded in 2012 with a vision of democratizing AI, Appier’s mission is turning AI into ROI by making software intelligent. Appier now has 17 offices across APAC, Europe and U.S., and is listed on the Tokyo Stock Exchange (Ticker number: 4180). Visit www.appier.com for more information.

About the role

Frontend engineers at Appier focus on handcrafting sophisticated web UI using cutting-edge front-end development technologies / tools. We work closely with UI/UX designers and backend engineers and deliver high-quality, fluent and elegant web applications to our enterprise customers, or to aid daily operations within Appier.

[The seniority/title is determined by job-related skills, experience, and evaluation after the interview.]

Responsibilities

Design & develop front-end architecture & interactive user interfaces

Work closely with backend engineers to integrate services, and contribute to building lightweight RESTful APIs when necessary to support frontend functionality

Ensures the flexibility of front-end architecture and the high performance of responsiveness

Build reusable code and UI design systems for cross-product consistency and scalability

Write unit, integration, and end-to-end tests to ensure code quality

Perform code reviews to ensure existing code stay high-quality, fast, and flexible

Handle and resolve issues escalated from the production operational environment

Participate in idea brainstorming and contribute ideas to technology, algorithms and products

About you

[Minimum qualifications]

3+ years of experience in software development

Good knowledge of HTTP, CSS, modern JavaScript (ES6+ / ECMAScript 2015+), TypeScript, HTML, DOM, and web standards

Respect coding convention, language standard syntax, documentation

In-depth knowledge of front-end frameworks and technologies (e.g., React.js, Vue.js) and their ecosystems.

Proactive, good interpersonal and problem-solving skill

Self-motivated, proactive, and a strong team player

Solid understanding of version control (Git) and CI/CD workflows

Experience leveraging AI-assisted development tools (e.g., GitHub Copilot, Cursor, Windsurf) to accelerate coding, debugging, and refactoring. Familiarity with these tools is expected as part of our team’s daily development workflow.

Passion for clean code, scalability, and performance, curious about new technologies and enthusiastic about developer experience

[Preferred qualifications]

Familiarity with modern build tools and bundlers (e.g., Babel, Webpack, Vite, Rspack, esbuild, etc.)

Experience in CSS Pre/Post-processors (PostCSS, SASS or LESS) or modern CSS solutions (e.g., CSS Modules, Tailwind CSS, Styled Components).

Experience in Node.js, Python, GraphQL, and integrating with various backend services and databases (e.g., MySQL, MongoDB)

Experience with testing frameworks such as Jest, React Testing Library, Vitest, or Playwright

Experience building or integrating SDKs or capable of developing across multiple browsers, platforms

Experience in web performance optimization

Familiarity with micro-frontend architecture

Experience with data visualization

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