Careers at PayPay Corporation

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. LIFE in JAPAN FACTBOOK 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 Other Information: PayPay Inside-Out (Corporate Blog) /JP PayPay Inside-out (Corporate Blog) /ENG PayPay Product Blog /JP PayPay Product Blog /ENG PIVOT動画：【PayPayが仕掛ける金融革命】

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. Team Missions Serving as an autonomous QA organization in Product Group. To improve the overall quality of PayPay products and services To develop PayPay quality standards and best practices To gain trust in quality from PayPay Users and Merchants Job Description Main Responsibilities Analyze testing requirements to develop comprehensive test scenarios for various test levels. Design and create detailed test cases that validate conformance to functional and non-functional requirements. Prepare and manage essential test data, tools, and environments for test execution. Execute test cases and scripts, meticulously documenting results. Log, track, and verify defects, ensuring accurate documentation and timely resolution. Collect, organize, and analyze test results to provide thorough reports on all QA activities. Analyze testing outcomes and recommend effective solutions for identified issues. Maintain and update comprehensive test documentation, ensuring coverage for new features and robust regression testing. Support knowledge management and foster collaboration by actively participating in testing discussions and contributing to continuous improvement through lessons learned. Act as a Subject Matter Expert (SME) for designated modules, providing critical domain knowledge and support to the QA team. Provide guidance and support to junior QA engineers, including onboarding and training. Leverage AI tools such as NotebookLM, Gemini, Cursor AI, GitHub Copilot, and OpenAI APIs to accelerate test case design, automation, and exploratory testing. Apply prompt engineering and RAG (Retrieval-Augmented Generation) techniques to validate LLM-driven applications, ensuring accuracy, reliability, and robustness. Work with OpenAI keys, LLM models, and MCP server integrations, automating API-based interactions and securing AI workflows. Test and monitor AI/ML systems for issues such as bias, drift, hallucinations, and performance deviations. Qualifications Minimum 5+ years of experience in developing, executing, and maintaining automated test cases for mobile applications, web applications, and/or APIs. Proven professional experience with at least one of the following automation frameworks/tools: Appium (for mobile), Selenium (for web), or Rest-Assured (for APIs). Proficient in utilizing Cucumber for defining and executing test cases. Well-versed in Continuous Integration/Continuous Deployment (CI/CD) tools such as Jenkins, Bitrise, or similar platforms. Basic understanding of microservices architecture and its associated testing challenges. Strong ability to analyze technical requirements, design comprehensive test strategies, and create detailed, effective test cases. Exceptional analytical and problem-solving skills, coupled with a meticulous attention to detail. Excellent communication skills, a team-oriented mindset, and the ability to work effectively both independently and collaboratively. Hands-on experience with AI productivity tools (NotebookLM, Gemini, Cursor AI, GitHub Copilot). Knowledge of OpenAI API usage, key management, embeddings, and LLM integration workflows. Familiarity with MCP server concepts and their integration in test automation pipelines. Understanding of AI system validation techniques, including testing for bias, hallucinations, drift, and robustness. Preferred Qualifications ISTQB or an equivalent QA certification. Experience working in Agile or other fast-paced development environments. Familiarity with the financial or payments domain is highly desirable. Experience in proposing and standardizing QA processes, with a proven ability to collaborate effectively with cross-functional teams. Experience in designing and executing performance tests using tools such as Gatling, wrk, or JMeter. Familiarity with Docker and Kubernetes for containerization and orchestration. Experience with bash or other command-line interface (CLI) scripting. Coding experience in building web or mobile-based applications. A strong sense of curiosity and a passion for continuously learning new technologies are definite plusses! PayPay 5 senses Please refer PayPay 5 senses to learn what we value at work 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. LIFE in JAPAN FACTBOOK Work Hours Super Flex Time (No Core Time) In principle, 9:00am-5:45pm (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 Other Information: PayPay Inside-Out (Corporate Blog) /JP PayPay Inside-out (Corporate Blog) /ENG PayPay Product Blog /JP PayPay Product Blog /ENG PIVOT動画：【PayPayが仕掛ける金融革命】

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 The Data Infrastructure team builds and operates the platform that powers data workloads across PayPay Group. We own the Databricks Lakehouse environment, the cloud infrastructure underneath it, and the tooling that keeps it running — from workspace provisioning and access governance to monitoring, alerting, and incident response. This role sits at the intersection of cloud infrastructure and data platform engineering. You'll design and build AWS infrastructure using Terraform, support Databricks workspace and account operations, and improve platform reliability through SRE practices. Day to day, that means writing IaC, responding to operational issues, shipping platform services, and working directly with data engineers across the group to keep their workloads running smoothly. We're looking for someone who can carry projects independently, thinks about systems beyond the ticket in front of them, and wants to go deeper on data infrastructure as a discipline. You don't need to know Databricks on day one — but you should be comfortable with AWS, Terraform, and the fundamentals of running production infrastructure. Main Responsibilities Design, build, and manage AWS cloud infrastructure using Terraform, following IaC and GitOps practices Operate and improve the Databricks Lakehouse platform — workspace provisioning, configuration management, and day-to-day reliability Build and maintain platform services and tooling that support data engineers across PayPay Group companies Strengthen system reliability through SRE practices: monitoring, alerting, dashboarding, and incident response Implement and enforce data governance and security controls in line with compliance requirements Collaborate with data engineering teams on infrastructure needs for their projects and workloads Participate in on-call rotation and operational support for the data platform Qualifications 3+ years of experience in infrastructure or platform engineering Hands-on experience with Terraform and Infrastructure as Code workflows Working knowledge of AWS — IAM, VPC, S3, EC2, and multi-account setups Familiarity with CI/CD pipelines (GitHub Actions, Jenkins, or equivalent) Experience with monitoring and observability tools (Prometheus, Grafana, or similar) Scripting ability in Python and/or Shell Solid fundamentals in Linux/Unix, networking (DNS, HTTP, basic OSI model), and security best practices Preferred Qualifications Experience with Databricks, EMR, or other data platform technologies Exposure to Kubernetes and GitOps tooling (EKS, ArgoCD) Familiarity with Kafka or event-based data ingestion patterns (CDC, batch consumption) Familiarity with workflow orchestration tools (Airflow, Dagster, Prefect) Experience with Spark, Hadoop, or large-scale data processing frameworks Background in platform engineering — building internal tooling, developer experience, or self-service infrastructure PayPay 5 senses Please refer PayPay 5 senses to learn what we value at work. 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. LIFE in JAPAN FACTBOOK 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 Other Information: PayPay Inside-Out (Corporate Blog) /JP PayPay Inside-out (Corporate Blog) /ENG PayPay Product Blog /JP PayPay Product Blog /ENG PIVOT動画：【PayPayが仕掛ける金融革命】