About PayPay

Toranomon, Tokyo

With over 47 million registered users (as of May 2022), PayPay is the country’s most popular mobile wallet. Half of all of Japan's smartphone users are using it, and more than 2 billion payments made per year.

Key benefits

  • International engineering team
  • Japanese lessons on company time
  • Incredible scale

About the position

PayPay is looking for a Backend engineer to work on our payment system to deliver the best payment experience for our customers.

Responsibilities

  • Design large scale systems with high complexity to support our high throughput applications.
  • Understand how to leverage infrastructure for solving such large scale problems.
  • Develop tools and contribute to open source wherever possible.
  • Adopt problem solving as a way of life – always go to root cause! Support the code you write in production.

Qualifications

  • Experience in using Java under professional environment, or if you are non-Java user, excellent skills in generalized programming languages, such as Scala, Python and Go.
  • Interest and ability to learn other coding languages as needed.
  • Experience with NoSQL databases and distributed cache.
  • Strong fundamentals in data structures, algorithms and object oriented programming.
  • In-depth understanding of concurrency and distributed computing.
  • Degree in Computer Engineering or Computer Science or 5+ years equivalent experience in SaaS platform development.

Preferred Qualifications

  • Experience with implementing platform components such as RESTful APIs, Pub/Sub Systems, Database Clients.
  • Experience with AWS services.
  • Experience in working for system development in finance, payment, or similar industries
  • Experience in system design, development of web system which handles massive amount of transactions or requires scalability
  • Language ability in Japanese and English is a plus (We have a professional translator but it is nice to have language skills)
  • Experience in microservices

Compensation

6.5 to 15 million JPY annually.

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Meet PayPay's Developers

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with Shilei Long

Shilei started working on PayPay before it launched, and has seen it grow into a product used by tens of millions of users. He explains how diversity has helped them overcome challenges, and what PayPay is looking for in candidates.

Read his story...

Growing your career by asking for you want

with Ashwini Meshram

Ashwini leads one of PayPay’s payment sub-teams. She got there by doing something she’s done throughout her career: identifying something she wants to do and asking to do it.

Read her story...

Refactoring PayPay’s Android App

with Adrian Mariadas

Adrian came to Japan to join PayPay as an Android Engineer. As the app has grown in scope, refactoring the codebase to ensure development can continue at a rapid pace has been a big part of his job.

Read his story...

iOS Development at PayPay

with Yoseph Savianto

Yoseph joined PayPay after being attracted to their mission of making Japan a cashless society. As an iOS Engineer, he originally joined their iOS feature team, but now works on their platform team, creating an internal SDK for their iOS and Android apps.

Read his story...

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