Description
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.
OUR VISION IS UNLIMITED_
We dare to believe that we do not need a clear vision to create a future beyond our imagination. PayPay will always stay true to our roots and realize a vision (future) that no one else can imagine by constantly taking risks and challenging ourselves. 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. We are looking for people who can embrace this challenge, refresh the product at breakneck speed and promote PayPay with professionalism and passion.
※ Please note that you cannot apply or be selected in parallel with PayPay Corporation, PayPay Card Corporation and PayPay Securities Corporation.
Job Description
PayPay is looking for a Backend Engineer to work on our payment system to deliver the best payment experience for our customers.
AI-First Culture at PayPay
At PayPay, we believe that the future of software development is AI-augmented. Every engineer is expected to actively leverage AI tools for code reviews, testing, documentation, debugging, and productivity. AI is not optional — it is a mandatory part of our daily engineering workflow. Candidates must demonstrate both experience and mindset in utilizing AI effectively to deliver high-quality systems faster and better.
Main 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.
- Leverage AI/LLM-based tools for code development, reviews, testing, and documentation in daily workflows.
Tech Stack
We select the best combination of tech at times.
| Java, Kotlin, Scala
| Spring Boot, JUnit, Resilience4j, 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
- 4+ years of 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.
- Business level of English or Japanese.
- Hands-on experience with AI/LLM tools (e.g., ChatGPT, GitHub Copilot, Gemini, CodeWhisperer, or similar) in professional software 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 systems which handle massive amount of transactions or require 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.
- Proven track record of integrating AI-assisted development into system design and delivery.
- Contributions to AI-related open-source projects or automation of workflows with AI is a plus.
PayPay 5 senses
- Please refer PayPay 5 senses to learn what we value at work.
Related position in PayPay Group
- PayPay Card: Backend Engineer
What is differences with PayPay (Please choose the position that best aligns with your career goals, as we do not allow simultaneous applications for two positions）
Working Conditions
Employment Status
- Full Time
Office Location
- Hybrid Workstyle
※ You will be expected to work in the office, in alignment with organizational guidelines and team objectives.
Work Hours
- Super Flex Time (No Core Time)
- In principle, 9:00am-5:45pm + 1h break (actual working hours: 7h45m + 1h break)
Holidays
-
Every Sat/Sun/National holidays (In Japan)/New Year's break/Company-designated Special days
Paid leave
- Annual leave (up to 14 days in the first year, granted proportionally according to the month of employment. Can be used from the date of hire)
- Personal leave (5 days each year, granted proportionally according to the month of employment）
＊PayPay's own special paid leave system, which can be used to attend to illnesses, injuries, hospital visits, etc., of the employee, family members, pets, etc.
Salary
- Annual salary paid in 12 installments (monthly)
- Based on skills, experience, and abilities
- Reviewed once a year
- Late overtime allowance
※Payroll payment can be changed to digital salary payment “PayPay Paycheck” for an amount set by you
Benefits
- Social Insurance (health insurance, employee pension, employment insurance and compensation insurance)
- 401K
- Translation/Interpretation support
- VISA sponsor + Relocation support
Similar jobs
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. OUR VISION IS UNLIMITED_ W…
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. OUR VISION IS UNLIMITED_ W…
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. OUR VISION IS UNLIMITED_ W…
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. OUR VISION IS UNLIMITED_ W…
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. OUR VISION IS UNLIMITED_ W…
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. OUR VISION IS UNLIMITED_ W…
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. OUR VISION IS UNLIMITED_ W…
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. OUR VISION IS UNLIMITED_ W…
About PayPay/PayPayについて 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. OUR VISION IS U…
PayPayについて 2018年にサービスを開始してから約8年でユーザー数7500万人を突破したフィンテック企業であるPayPayは約50か国の国と地域から集まった多様なメンバーで構成されています。 OUR VISION IS UNLIMITED_ 我々は自分たちの想像を超える未来を創るためにあえて明確なビジョンは必要ないと考えています。常にDay1であるスタンスを忘れずに、誰もが想像できないようなビジョン（未来）を実現していくのがPa…
About PayPay's Referral Hiring Program ▼About PayPay's Referral Hiring Program At PayPay, we are strengthening our referral hiring activities (hiring through referrals from employees)! To be eligible for this program, ap…
About Payoneer Founded in 2005, Payoneer is the global financial platform that removes friction from doing business across borders, with a mission to connect the world’s underserved businesses to a rising global economy.…
About Remote Remote is solving modern organizations’ biggest challenge – navigating global employment compliantly with ease. We make it possible for businesses of all sizes to recruit, pay, and manage international teams…
About Payoneer Founded in 2005, Payoneer is the global financial platform that removes friction from doing business across borders, with a mission to connect the world’s underserved businesses to a rising global economy.…
About Payoneer Founded in 2005, Payoneer is the global financial platform that removes friction from doing business across borders, with a mission to connect the world’s underserved businesses to a rising global economy.…
Company Introduction About Rocket Now Rocket Now is a food delivery service with no delivery or service fees. Consumers can enjoy a wide variety of cuisines, from Japanese and Western food to healthy options, as well as…
About Payoneer Founded in 2005, Payoneer is the global financial platform that removes friction from doing business across borders, with a mission to connect the world’s underserved businesses to a rising global economy.…
会社概要 ロケットナウ（Rocket Now）について ロケットナウは、送料とサービス料が無料のフードデリバリーサービスです。和食、洋食、ヘルシー志向の料理など多彩なジャンルの料理から、デザートやドリンクまで迅速かつお得にお楽しみいただけます。サービスは、北海道、東北（仙台）、関東（東京・神奈川・埼玉・千葉）、中部（愛知・静岡）、関西（大阪・京都・兵庫）、広島、九州（福岡）を中心に展開中です。 ロケットナウアプリは、グローバルマーケット…
Company Introduction CP One Japan, a wholly owned subsidiary of Coupang, Inc. (hereinafter “Coupang”), has launched a new food delivery app called ‘Rocket Now’ in selected areas of Tokyo. CP One Japan is a wholly owned s…
About Workato Workato delivers enterprise infrastructure for the agentic era, redefining iPaaS and helping enterprises unify data, applications, processes, and AI into a single, governed platform. A leader in Enterprise…
About Payoneer Founded in 2005, Payoneer is the global financial platform that removes friction from doing business across borders, with a mission to connect the world’s underserved businesses to a rising global economy.…
About Remote Remote is solving modern organizations’ biggest challenge – navigating global employment compliantly with ease. We make it possible for businesses of all sizes to recruit, pay, and manage international teams…
About Appier Appier is a software-as-a-service (SaaS) company that uses artificial intelligence (AI) to power business decision-making. Founded in 2012 with a vision of democratizing AI, Appier’s mission is turning AI in…
Company Introduction About Rocket Now ロケットナウは、送料とサービス料が無料のフードデリバリーサービスです。和食、洋食、ヘルシー志向の料理など多彩なジャンルの料理から、デザートやドリンクまで迅速かつお得にお楽しみいただけます。サービスは、北海道、東北（仙台）、関東（東京・神奈川・埼玉・千葉）、中部（愛知・静岡）、関西（大阪・京都・兵庫）、広島、九州（福岡）を中心に展開中です。 ロケットナウアプリは、…
About Remote Remote is solving modern organizations’ biggest challenge – navigating global employment compliantly with ease. We make it possible for businesses of all sizes to recruit, pay, and manage international teams…
About Remote Remote is solving modern organizations’ biggest challenge – navigating global employment compliantly with ease. We make it possible for businesses of all sizes to recruit, pay, and manage international teams…
About Remote Remote is solving modern organizations’ biggest challenge – navigating global employment compliantly with ease. We make it possible for businesses of all sizes to recruit, pay, and manage international teams…
About Payoneer Founded in 2005, Payoneer is the global financial platform that removes friction from doing business across borders, with a mission to connect the world’s underserved businesses to a rising global economy.…
About Rocket Now Rocket Now is a food delivery service with no delivery or service fees. Consumers can enjoy a wide variety of cuisines, from Japanese and Western food to healthy options, as well as desserts and drinks,…
About Rocket Now Rocket Now is a food delivery service with no delivery or service fees. Consumers can enjoy a wide variety of cuisines, from Japanese and Western food to healthy options, as well as desserts and drinks,…