Remote

Kotlin Multiplatform Mobile Engineer

Remote OK - Anywhere in Japan
Full-time
January 16, 2024

Job Description

PayPay is looking for a Kotlin Multiplatform Mobile Engineer to build and maintain high quality and robust SDKs for development teams.

Main Responsibilities

Work closely with our App platform team to build and maintain core business logic SDKs

Support integrations with our Android and iOS feature teams

Active on improvement at platform/structure level

Define and follow coding standards, architecture principles, code reviews, build processes and testing

Promote collaboration by mentoring and sharing knowledge

Tech Stack

| Kotlin, Gradle

| Ktor, Coroutines, SQLDelight

| Github, Android Studio

| Firebase, AppsFlyer

| Slack, Zoom

Qualifications

Deep understanding of modern mobile development

Strong in Object Oriented design and Kotlin

Experience with the Android development

Strong passion for code quality and are not allergic to test cases

Familiarity with integration of Rest API

Strong sense of ownership

At least one mobile app you can show off in the interview

At least 3-5 years of professional experience.

Preferred Qualifications

More interest in KMM/platform work rather than feature development

At least one year of experience in KMM

Experience with GA/CI/CD tool(e.g. Bitrise)

Ability to develop SDKs while conducting unit tests

Knowledge of performance optimization

Ability to communicate with platform members and other development team in English

Familiarity with Agile development

Experience integrating and development payment service

PayPay 5 senses

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

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About PayPay

PayPay is a FinTech company that has grown to over 75M (as of August 2026) users since its launch in 2018. Our team is hugely diverse with members from over 50 different countries.

PayPay dares to believe that they do not need a clear vision to create a future beyond our imagination. PayPay will always stay true to their roots and realize a vision (future) that no one else can imagine by constantly taking risks and challenging themselves. With this mindset, you will be presented with new and exciting opportunities on a daily basis and have the opportunity to grow and reach new dimensions that you could never have imagined. PayPay is looking for people who can embrace this challenge, refresh the product at breakneck speed and promote PayPay with professionalism and passion.

Japanese Language Policy
At PayPay, there is a mixture of Japanese and English spoken. Around 80% of their product team’s discussions happen in English, and they have technical interpreters and translators on staff to facilitate any translation necessary. Some members can speak both English and Japanese, but some can only speak either English or Japanese.

PayPay doesn’t have an official shared language, but in practice English tends to be the primary language used for internal communications and technical discussions like code reviews.

Instead of requiring that everyone be able to speak a specific language, PayPay expects an ability to communicate with mutual respect and a drive to ensure that you’re understood. The product team values proactive communication highly.
Visa Sponsorship
PayPay sponsors visas for applicants from overseas.
Paid Leave
- Days Off: Saturdays and Sundays. National holidays. Year-end and New Year holidays.
- Holidays: Annual paid leave, congratulatory or condolence leave, maternity leave and etc.
Benefits
🌎 Translation/interpretation support (EN<>JP)

🧡 Support for translation or other administrative tasks in Japanese

👍 Support from bilingual PIC for engineers

🇯🇵 Free Japanese lessons on company time

💻 PC and phone are given (based on the company’s regulations)

👩‍🎓 Training Program: We have various training programs for different kinds of needs

💜 Social security/insurance benefits included

💛 Defined contribution pension system (TBC)

🏥 Health insurance

🚃 Transportation coverage (up to ¥150,000/mo)
Engineer Interview Process
PayPay's Hiring process are as below:
- Application Review (English CV is required)
- Coding Test or Take Home Assignment (only applied to required positions)
- 3-4 Interviews (including both technical and behavioral interviews)
- Offer Meeting
Remote Work
Hybrid Workstyle (flexible working style including Remote and office)

※ You will be expected to work both in the office and remotely, in alignment with organizational guidelines and team objectives.
Work style
- Super Flex Time with no core time
- In principle, from 9:00am-5:45pm (actual working hours: 7h45m + 1h break)