Senior Backend Engineer (Principal/Tech Lead)

Remote OK - Anywhere in Japan
Full-time
April 10, 2024

Responsibilities

Design and develop large-scale systems to support high throughput applications with complex requirements.
Utilize infrastructure effectively to address scalability challenges.
Contribute to open source projects and develop tools to improve system efficiency.
Embrace problem-solving as a core practice, focusing on root cause analysis and providing ongoing support for production code.

Tech Stack

Our technology stack may vary based on project needs. Currently, we utilize:

Programming Languages: Java, Kotlin, Scala
Frameworks and Tools: Spring Boot, JUnit, Resilience4j, Feign
Databases: MySQL/AuroraDB, DynamoDB, ELK, Kafka, Redis, TiDB
Deployment and Orchestration: Docker, Kubernetes, ArgoCD, AWS, GCP
Development Tools: GitHub, IntelliJ, Gradle, Maven, npm/yarn, Flyway, Jenkins
Data Analytics: BigQuery, Kibana, Spark
Diagramming Tools: PlantUML, draw.io, miro.com
Communication: Slack, Zoom

Qualifications

Proficiency in Java or equivalent programming languages (Scala, Python, Go).
Eagerness to learn new languages and technologies as required.
Experience with SQL and NoSQL databases, as well as distributed caching.
Strong understanding of data structures, algorithms, and object-oriented programming principles.
Knowledge of concurrency and distributed computing.
Hands-on experience with RESTful APIs, Pub/Sub Systems, and Database Clients.
Familiarity with microservices architecture.
Previous involvement in designing and maintaining high-traffic systems.
Bachelor's degree in Computer Engineering, Computer Science, or equivalent experience in SaaS platform development (minimum 5 years).
Fluent in English or Japanese.

Preferred Qualifications

Previous experience in developing new products from inception.
Ability to design systems compliant with legal and security standards, with strong leadership skills for requirement identification.
Experience in improving system resilience and implementing disaster recovery strategies.
Awareness of market trends and needs, prioritizing speed and quality through MVP approaches.
Track record of delivering products within tight deadlines.
Commitment to continuous product improvement post-launch.
Strong cost-efficiency mindset with effective system cost analysis skills.
Willingness to share experiences and foster a culture of learning and improvement.
Experience in finance, payment, or related industries.
Additional language proficiency in Japanese and English is a plus.
Experience with AWS services.

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About PayPay

PayPay, a fintech company that achieved more than 47M users within around 3 years since its launch in 2018 has hugely diversified employees who are from 40 different countries.

Our biggest competitor is "cash". We are seeking for people who can accept this challenge positively, brush up 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’s policies during COVID-19 are as follows:

PayPay has been transitioning to remote work to ensure employees safety during the pandemic, and we’ll continue this even after it subsides.
While we’re open to considering engineers looking to relocate to Japan, travel restrictions have made it difficult to give a clear timeframe for relocation.
Until COVID-19 is settled and we're ready to issue visas, you can start working remotely from abroad.

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
Engineering Jobs

1) Application Review (1-2 weeks)
We review your profile based on your submitted materials

2) Code challenge (online)
We send you a code challenge after reviewing your resume. Please be prepared to take code challenge after submitting your application! It takes at most 3-4 hours to complete

3) 1 - 3 Interviews (online)
You will have 1 to 3 interviews with our engineers and HR
Work style
PayPay has introduced a highly unique “Working From Anywhere at Anytime” (WFA) HR system.

They work fully remotely, so as long as you’re in Japan you can generally live and work from wherever you want. Of course, there may be times you’re asked to come to the office for teambuilding and other activities (typically 1-2 times a month).

This system enables members to receive salary and benefits relative to a world-class city and work with world-class peers without actually having to live in a city. By changing how people at PayPay work, the system aims to provide a stimulating environment that enables members to build an amazing product that’s beloved by its users.

※ Currently, remote work is limited to within Japan. There is no support for working from abroad at this time.

Work hours
- In principle, from 10:00am to 18:45pm (actual working hours: 7h45m＋1 hour lunch break from 12pm to 13pm in principle)
  ※ We use super flextime system which do not set core hours and also we may have overtime work based on business needs.