Senior Frontend Development Engineer

Appier is hiring a Senior Frontend Development Engineer in Taipei, Taiwan. Level rates it ; you can apply on Appier.

Level's read on this job

Level rates this role Uses AI ●●○○: an ordinary role that requires AI tools.
Tools and skills the posting cites include Copilot and Cursor.
Level classifies it as a senior role.
Level lists 66 other open roles at Appier.

AI in this role

copilotcursor

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 UIs and ad content using cutting-edge front-end development technologies and tools. We collaborate closely with designers and backend engineers to deliver high-quality, smooth, and elegant web applications for the advertising domain as well as support daily operations within Appier.

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

Responsibilities

Design and develop reusable advertising UI components (e.g., banners, video ads) and supporting systems using modern JavaScript frameworks and AI-powered tools.
Build and maintain a modular JavaScript library or SDK to ensure scalable, consistent, and easily integrated ad rendering and tracking.
Optimize ad content performance through efficient loading strategies and responsive design.
Develop integrations with external SSP platforms, ensuring compliance with technical standards.
Implement and manage analytics tools to monitor user interaction and ad effectiveness, delivering actionable insights.
Participate in brainstorming sessions, contributing innovative technical solutions across UI/UX, algorithms, and product development.
Utilize AI-powered development tools (e.g., GitHub Copilot, Tabnine, Cursor) to enhance coding efficiency and maintain code quality.

About you

[Minimum qualifications]

Solid understanding of HTML, CSS, JavaScript, TypeScript, DOM, HTTP and web standards.
Knowledge of modern front-end frameworks like React, Vue, Svelte.
Experienced in integrating with REST APIs and GraphQL
Experienced with bundler: Vite, Webpack, esbuild, and Rollup.
Familiarity with Git for version control.
Experience ensuring cross-browser compatibility.
Practice coding conventions, syntax standards, and thorough documentation.
Shows initiative and strong interpersonal skills in problem-solving.
Ability to work effectively both independently and as part of a team.

[Preferred qualifications]

Explores and shares insights on AI tools like GitHub Copilot, Tabnine, Cursor, and AI-driven testing to enhance front-end development and code quality.
Experienced with meta frameworks like: Next.js, Nuxt.js, SvelteKit.
Experienced with CSS-in-JS, PostCSS, SASS, and Tailwind CSS.
Skilled in Jest, React Testing Library, Cypress, and Playwright for testing.
Experienced in web performance optimization using Core Web Vitals, Lighthouse, WebPageTest, and Chrome DevTools.
Experienced in debugging on any web environments like webview or browser.
Experienced in server-side JavaScript runtime: Node.js, bun, deno.
Experienced with relational databases or NoSQL databases.
Familiar with CI/CD tools (GitHub Actions, Jenkins, Bitbucket) and Docker.

#LI-TC1

How we rate this

Senior Frontend Development Engineer at Appier rates 56 out of 100 for how much of the daily work is AI. That makes it Uses AI (AI Level 2 of 4). The level is about AI in the job, not seniority.

Classification

Uses AI. An ordinary role that requires AI tools.

●●●● Builds AI80 to 100
●●●○ Works on AI60 to 79
●●○○ Uses AI40 to 59
●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.

Key facts

Senior Frontend Development Engineer is an open job at Appier.
Level rates this role AI Level 2 of 4: Uses AI.
The role is based in Taipei, Taiwan.
The job was posted on May 23, 2025.
Seniority: senior.
Applications are handled by Appier. Apply on Appier

Prepare for this job

Built from this posting and from similar jobs on Level.

Skills and AI tools this role asks for

CopilotCursor

Questions you could be asked

What's a project where you used Copilot hands-on?
Walk me through how you've used Cursor in your day-to-day work.
This role expects you to use AI tools as part of the job. Which ones have you used, and for what?
Tell me about a time an AI tool got something wrong. How did you catch it?

Adapt your resume

List these exact terms on your resume: Copilot and Cursor. An applicant tracking system matches the wording, not the idea.
Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
Put the AI tool in a bullet point about what you did, not just in a skills list. This role treats it as a required part of the job.

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