Senior Backend Engineer

Remote OK - Anywhere in Japan
Full-time
December 13, 2024

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

Main Responsibilities

Design large-scale systems with high complexity to support our high throughput applications.
Understand how to leverage infrastructure to solve such large-scale problems.
Develop tools and contribute to open source wherever possible.
Adopt problem-solving as a way of life – always go to the root cause! Support the code you write in production.
Participate in code reviews to maintain high-quality code standards and ensure security/data protection measures
Support team members by providing technical guidance and design directions
Constantly identify performance improvements and optimize the application for maximum speed and scalability
Collaborate with product managers and other stakeholders to gather requirements and deliver features on time

Tech Stack

We select the best combination of tech at times.

Java, Kotlin, Scala
Spring Boot, JUnit, Reselience4j, Feign
MySQL/AuoraDB, DynamoDB, ELK, Kafka, Redis, TiDB
Docker, Kubernetes, ArgoCD, AWS, GCP
GitHub, IntelliJ, Gradle, Maven, npm/yarn, Flyway, Jenkins, snyk,
Bigquery, Kibana, Spark
PlantUML, draw.io, miro.com
Slack, Zoom

Qualifications

Excellent skills in Java, or any other generalized programming language, such as Scala, Python, or Go.
Interest and ability to learn other coding languages as needed.
Experience with SQL and NoSQL databases, along with distributed cache.
Strong fundamentals in data structures, algorithms, and object-oriented programming.
In-depth understanding of concurrency and distributed computing.
Experience implementing platform components such as RESTful APIs, Pub/Sub Systems, and Database Clients.
Experience with microservices.
Experience designing high-traffic systems.
Degree in Computer Engineering or Computer Science or 5+ years equivalent experience in SaaS platform development.
Business of English or Japanese

Preferred Qualifications

Experience in working for system development in finance, payment, or similar industries.
Language ability in Japanese and English is a plus (We have a professional translator, but it is nice to have language skills).
Experience with AWS services.

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About PayPay

2018年にサービスを開始してからわずか2年4か月でユーザー数3600万人を突破したフィンテック企業であるPayPayは現在35か国以上の国から集まった多様なメンバーで構成されています。従業員は1000名をすでに超えていますが、まだまだ会社は成長段階であり「未完成」です。「PayPay」の提供に当たっては、インド最大の決済サービス事業者であるPaytm社と連携し、同社の顧客本位のテクノロジーを活用して日本におけるスマホ決済を構築しサービスを拡大していきます。

わたしたちの最大のライバルは“現金”です。この困難な課題に前向きに取り組み、他社に真似できない圧倒的なスピードでプロダクトを磨き上げ、日本のキャッシュレス決済、またそれを使用した金融ライフプラットフォームとしての普及を一気に推進することにプロフェッショナルとして情熱を持って取り組み、自ら課題発見し、周囲と協力して新しい価値創出を共に推進する仲間を募集します。

また、働き方に関してもWFA（Working From Anywhere)制度など、新しい人事制度を採り入れてます。当社は基本的にフルリモートでの勤務となる為、勤務場所や現在の居住地は問いません。地方に暮らしながらも国際都市水準の給料・福利厚生を得ながら、世界レベルの仲間と仕事をする。そんな働き方もPayPayでは実現できます。

【言語要件】日本語 / 英語どちらかが流暢（ビジネスレベル以上）であれば応募いただけます！

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 holidays from December 29th to January 4th.
- 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

🏠 Work from home allowance (100,000JPY/year)

💻 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
PayPay had introduced a new personnel system called WFA (Working From Anywhere*). At PayPay, we work fully remotely in Japan. Therefore, the working place or your living place doesn't matter. Even if you are living in a local area, the salary and benefit package will be at an international level while you enjoy working with world class colleagues.

*This WFA policy is applicable only within Japan.
Work style
- Super Flex Time with no core time
- In principle, from 10:00am-6:45pm (actual working hours: 7h45m + 1h break)