PayPay is hiring a Full Stack QA Engineer. You must have 3+ years of experience in mobile/web/API test automation and proficiency in Appium, Playwright, or Selenium. You will lead quality validation using AI tools (LLM, RAG) and establish quality standards for banking system rene
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PayPay is a FinTech company that has grown to over 70M (as of July 2025) 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.
The team you will join primarily leads projects related to the renewal of our banking systems. Our in-house engineers take the lead in driving initiatives from scratch — from initial planning and design through to hands-on coding. As a newly established team, you will have the unique opportunity to help shape our development standards and build the engineering environment together from the ground up.
※ After joining the company, you are expected to be seconded to PayPay Bank as a member of the above project.
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
プロダクトグループにおける独立したQA組織としての役割を担う
PayPayのプロダクトおよびサービス全体の品質向上を推進する
PayPayの品質基準およびベストプラクティスを策定・確立する
PayPayユーザーおよび加盟店から品質に対する信頼を獲得する
Job Responsibilities・役割と責任
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
Drive quality improvement with a strong focus on test automation, while also taking ownership of comprehensive validation activities that include manual testing
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
Gain experience from the design to the introduction of a new system renewal
Opportunity to collaboratively build a new organization and environment
Acquire high-level planning and proposal capabilities through supporting top management's decision-making and high-level coordination with various departments and affiliated companies, including PayPay
Gain frontline work experience in the industry at a company aiming to provide unprecedented financial services during a transformative period in the financial industry
Ability to leverage PayPay's service and user base
Application development for new services and improvements to existing services:
Account opening linked with LINE, inquiry chat
PayPay mini-app integration
Expansion of cardless ATM usage
Improvement of account opening processes
Improvement of various loan services, etc.
新サービスから既存サービスの改善におけるアプリケーション開発を行います。
LINE連携した口座開設、問い合わせチャット
PayPayミニアプリ連携
カードレスATMの利用拡大
口座開設処理の改善
各種ローンサービスの改善 など
Required Experience/Skills・必要な経験/スキル
Minimum 3+ 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), Playwright/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 Github actions, 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
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.
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)
