Senior Backend Engineer

Remote OK - Anywhere in Japan
Full-time
September 20, 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

PayPay, a FinTech company that has achieved more than 65M users (as of August 2024) within around six years 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.

PayPay's 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.

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)