Frontend Engineer

Responsibilities

• Deliver product features end-to-end by translating requirements into clean, scalable UI implementations
• Build reusable UI components and patterns using tools like Storybook
• Integrate APIs and handle real-world states including pagination, caching, and error handling
• Write maintainable, modular code with clear separation of concerns
• Optimize performance by identifying rendering, network, and bundle size bottlenecks
• Participate in code reviews and enforce best practices for testing and build tooling
• Collaborate cross-functionally with PM, Design, and Backend teams
• Support operational excellence through on-call rotation and using observability tools like Sentry and New Relic
• Grow toward full-stack ownership by contributing to BFF/API layers using Node.js

Requirements

• 4-6 years of professional frontend development experience
• Strong JavaScript fundamentals
• Solid experience in React and/or Vue
• Proven ability to write readable, modular, production-quality code
• Strong problem-solving skills with practical DSA knowledge
• Ability to perform low-level design (LLD) for frontend features
• Experience leveraging AI/LLM based tools in daily workflows
• Proven experience in web networking, security, and web change management

Preferred Qualifications

• Experience with Nest.js and Node.js
• Familiarity with design systems and accessibility basics
• Exposure to frontend observability and performance metrics
• Experience with micro-frontends or large-scale frontend architectures

About the Company

PayPay is a fintech company providing a service enjoyed by over 70 million users. Based in Japan and expanding globally, PayPay fosters an AI-first culture where engineers are expected to leverage AI tools to augment their productivity and engineering rigor.