Frontend Engineer (New Bank Project)

Tokyo, Japan

Advanced relocation package

• Adaptation tips
• Flight ticket
• Language courses
• Money for moving expenses
• Temporary housing
• Housing search assistance
• Visa services

About PayPay

PayPay, a FinTech company that has achieved more than 75M (as of August 2026) since its launch in 2018, is rapidly expanding its business scale as a payment platform used by approximately one out of every two smartphone users in Japan.

The company has a diverse team of professionals from more than 50 countries and is building a world-class engineering organization.

Our biggest competitor is "cash". They are seeking people who can accept this challenge positively, brush up on the product at a tremendous speed that other companies could never achieve, and who are passionate about promoting and spreading such a financial life platform in a short time along with professionalism.

PayPay is committed to maintaining a "Day 1" mindset, bringing to life visions of the future that no one else can even imagine. At PayPay, we provide an environment where everyone can deliver outstanding performance as professionals, through a flexible work style that includes remote and office.

Position

About the Organization/Team

PayPay Bank is responsible for developing the financial infrastructure that supports the financial services of the PayPay Group. Our team is driven by our in-house engineers, from the design and development of the core system to its operation.

Our role is not just to develop functions, but to:

• Evolve the system while maintaining high reliability
• Design an architecture that anticipates future service expansion
• Create the development organization and development process itself

Because it is a new organization, you can proactively participate in technology selection and the creation of development culture.

After joining the company, you are expected to be seconded to PayPay Bank as a member of the above project.

Background of Recruitment

We are accelerating the modernization of PayPay Bank’s customer-facing website and internal back-office systems.

To support this transformation, we are looking for hands-on and collaborative Frontend Engineers who can take ownership of product delivery, work closely with cross-functional teams, and help us build scalable foundations for future development.

You will have the opportunity to contribute not only to individual product features, but also to frontend architecture, development processes, and engineering standards across the organization.

Job Responsibilities

• Work with Product Managers, Designers, Backend Engineers, and QA Engineers to deliver features.
• Review product requirements and Figma designs, and suggest improvements.
• Design and implement frontend solutions using Vue.js and TypeScript.
• Align API requirements with Backend Engineers.
• Work with QA Engineers on testing and issue resolution.
• Monitor released features and resolve production issues.
• Participate in code reviews and improve frontend best practices.

Attractiveness of This Position

[Tech Challenges]

Legacy System Modernization

Some important banking services still run on legacy JSP systems. Their business rules and workflows may be spread across old code, documents, and team knowledge. Frontend Engineers work with Product Managers and business teams to understand the current behavior, clarify hidden requirements, and simplify complex workflows. Based on this understanding, engineers propose modern and maintainable technical solutions.

The challenge is not simply rewriting old code. It is to:

• Understand the existing business rules and dependencies.
• Decide what should be kept, improved, or removed.
• Design modern frontend architecture and API integrations.
• Migrate step by step without disrupting banking operations.
• Turn complex legacy systems into solutions that are easier to maintain and develop.

End-to-End Ownership

For new features, you will not only receive a design and implement it. You will be involved from the beginning to the end:

• Understand the product idea.
• Suggest product and design improvements.
• Review Figma designs with Designers.
• Design the frontend solution.
• Align API requirements with Backend Engineers.
• Implement and test the feature.
• Support QA and release.
• Monitor the feature after release.

You will have the freedom to propose solutions and take ownership of your feature.

Open Engineering Culture

We encourage engineers to identify problems and create improvement proposals. You can propose improvements to the product, user experience, architecture, or development process.

We also keep meetings simple and protect engineers’ focus time.

Project Examples

Shared Pagination Standard

Identified pagination inconsistencies across back-office systems and proactively collaborated with designers to establish a company-wide pagination standard, driving UI consistency and improving developer efficiency.

Tech Stack

We select the best combination of tech at times.

• TypeScript, JavaScript, HTML/CSS
• Vue.js, React, single-spa, JSP
• AWS, GH Actions, Terraform
• GitHub, npm/yarn, Webpack, Jest, i18n, Storybook
• Sentry, Kibana, Google Analytics, Firebase
• Figma, PlantUML, draw.io, Miro
• Slack, Zoom, Confluence, Jira

Your qualification

• At least 4 years of industry experience developing secure web frontend applications in JavaScript and/or other transpile-to-JavaScript languages.
• At least 1 year of industry experience with VueJS (preferred), or React.
• Software engineering best practices and computer science knowledge.
• Business level of English.
• Hands-on experience with AI/LLM tools (e.g., ChatGPT, GitHub Copilot, Gemini, CodeWhisperer, or similar) in professional software development.

Desired Experience/Skills

• Experience with frontend performance monitoring and optimization.
• Experience with iOS or Android development, either with the native toolkits or with a framework such as React Native.
• Experience with designing server side RESTful APIs.
• Experience with web hosting infrastructure such as CDNs.
• Ability to conduct business in Japanese (native-level proficiency or equivalent to JLPT N1/N2).
• Proven track record of integrating AI-assisted development into system design and delivery.
• Contributions to AI-related open-source projects or automation of workflows with AI is a plus.

Desired Candidate Profile

• Individuals who can logically structure their thoughts and communicate effectively
• Individuals who can approach everything with a strong sense of ownership

What we offer

• Social Insurance (health insurance, employee pension, employment insurance and compensation insurance)
• 401K
• Translation/Interpretation support
• VISA sponsor + Relocation support

Additional details

PayPay 5 senses

Please refer to PayPay 5 senses to learn what we value at work.

Working Conditions

Employment Status

• Full Time

Office Location

• Hybrid Workstyle

You will be expected to work in the office, in alignment with organizational guidelines and team objectives.

Work Hours

• Super Flex Time (No Core Time)
• In principle, 9:00am-5:45pm + 1h break (actual working hours: 7h45m + 1h break)

Holidays

• Every Sat/Sun/National holidays (In Japan)/New Year's break/Company-designated Special days

Paid leave

• Annual leave (up to 14 days in the first year, granted proportionally according to the month of employment. Can be used from the date of hire)
• Personal leave (5 days each year, granted proportionally according to the month of employment)

PayPay's own special paid leave system, which can be used to attend to illnesses, injuries, hospital visits, etc., of the employee, family members, pets, etc.

Salary

• Annual salary paid in 12 installments (monthly)
• Based on skills, experience, and abilities
• Reviewed once a year
• Late overtime allowance

Payroll payment can be changed to digital salary payment “PayPay Paycheck” for an amount set by you