Mercari
Software Engineer, QA - Merpay
ãœãããŠã§ã¢ãšã³ãžãã¢ãQA - Merpay
Tags: Full-time, 3 YOE, Business Japanese
Roppongi, Tokyo, Japan / Minato City, Tokyo, Japanã»Fetched 2 days ago
Job Description
Team: Engineering

Software Engineer, QA â Merpay
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- Grow Together
- Solve Through Mechanisms
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Software Engineer, QA â Merpay
- Employment Status:Full-time
- Work Hours:Full Flextime (no core time)
- Office: Roppongi
- For more details, see the Overview of Our Positions section on our Careers site.ã
About Mercari
Circulate all forms of value to unleash the potential in all people
"What can I do to help society thrive with the finite resources we have?" The Mercari marketplace app was born in 2013 out of this thought by our founder Shintaro Yamada as he traveled the world. We believe that by circulating all forms of value, not just physical things and money, we can create opportunities for anyone to realize their dreams and contribute to society and the people around them. Mercari aims to use technology to connect people all over the world and create a world where anyone can unleash their potential. For more information about Mercari Groupâs mission, see Mercariâs Culture Doc
Organization/Team Mission
Mercari Engineering Principles
Mercari Engineering Principles are a shared understanding that serves as the foundation of engineering beliefs and behavior at Mercari. The Engineering Principles are designed to complement the organizational identity (Mercariâs mission, values, and culture) from an engineering viewpoint.
These principles ultimately help us achieve Mercariâs mission by defining the ideal state we seek to realize in the long term.
- Passion For The Product
- Grow Together
- Solve Through Mechanisms
- Collaborate Openly
For more details, please see the following link:
Merpay QA engineering team
The Merpay QA team is dedicated to ensuring the highest quality of our innovative products and services. We employ a combination of traditional QA practices and AI-driven testing solutions to optimize our quality assurance processes. Our focus spans across various areas, including specification reviews, test planning, execution, bug reporting, and process improvement for both web and mobile applications, as well as backend systems.
As a QA Engineer at Merpay, you will play a crucial role in this effort, focusing on a broad scope of responsibilities that contribute to the overall quality of our offerings. The current small size of the team allows individuals to take ownership and contribute proactively.
ã
Development Environment
- Tools used: ArkCI / GitHub / Jetpack Compose / XCUITest / Playwright / BigQuery / Looker / Datadog / Postman / Slack / Jira / Confluence / TestRail
- Development method: Agile (Scrum, Kanban, etc.)
- AI assistance tools: Google Gemini / Cursor / ChatGPT
See here for more information about our mission and values.
Work Responsibilities
Quality Assurance & Testing
- Develop and execute comprehensive test plans and test cases, with a focus on identifying and implementing opportunities for AI-powered test automation
- Analyse test data to identify trends and patterns, using AI-driven analytics tools to improve test coverage and defect prediction
- Design and implement QA strategies that incorporate AI to increase efficiency and accuracy, evaluating and integrating AI tools for test case generation, execution, and analysis
- Perform specification reviews and improvements
- Plan, design, and implement tests for medium-scale projects
- Manage test environments
- Report and track software defects
- Design and implement API tests and regression tests, and work on operation and maintenance
Collaboration & Coordination
- Collaborate with development teams to ensure AI models are tested effectively and integrated into the software
- Negotiate and coordinate with relevant microservice developers
- Coordinate QA activities across different services and teams
- Manage tests, bugs, and team members working on your microservice
Process Improvement
- Improve the development process, including the incorporation of AI methodologies
- Streamline and automate tests for web and smartphone apps and backend
- Stay up-to-date with the latest advancements in AI for QA and recommended best practices
Unique Challenges
- Working in a fast-paced environment with frequent service development
- Coordinating QA activities across different services and teams
- Having a high level of decision-making power in QA activities
- Working with a diverse team and external partners
- Handling complex financial service quality assurance
- Implementing and managing AI-driven testing solutions
Qualifications
- Required Experience/Skills
- Bachelor's degree in Computer Science or a related field
- 3+ years of experience in software quality assurance
- Software testing knowledge and experience
- Experience in mobile, backend or web app QA
- Strong analytical and problem-solving skills
- Experience with test automation frameworks and a desire to learn AI-driven automation techniques
- A strong interest in and understanding of AI concepts and their application to software quality assurance
- Knowledge and experience related to process improvements for projects.
- Project communication ability
- Business-level Japanese communication ability
- Shared belief in Mercari Groupâs mission and values
- Preferred Experience/Skills
- Software development experience
- Familiarity with AI tools or platforms for testing (e.g., AI-powered test generation tools)
- Experience in analysing large datasets and using data visualisation tools, with an interest in applying AI for data-driven QA decisions
- Experience building a testing environment and knowledge of CD and CI
- Experience and skills related to implementing and operating automated tests
- Experience in quality control or test management
- Experience in QA for services developed with microservices
- Experience drafting test plans from scratch
- Experience with people management
- Experience in QA for the financial or payments industry
- Bonus Points : Experience with machine learning models
- Language
Candidates must meet at least one of the following language proficiency requirements - English (Independent - CEFR B2) / Japanese (Independent - CEFR B1)
- English (Basic - CEFR A2) / Japanese (Independent - CEFR B2)
For details about CEFR, see here.
Learn More About Mercari Group
- Careers site: https://careers.mercari.com/en/
- Mercan: https://mercan.mercari.com/en/
- Social media: X / Linkedin
- ãã€ã³ã¿ãŒã³ã·ããããã£ããã§æç³»ãããšã³ãžãã¢ãžïŒ ãQAãšã³ãžãã¢ïœç§ãã¡ãã¡ã«ã«ãªã§åãçç± (only in Japanese)
- çæAIã®å¯èœæ§ãæå€§éã«æŽ»ãããæäŸäŸ¡å€ãæå€§åãããã¡ã«ã«ãªã®çæAIç€Ÿå æŽ»çšã2024幎äžåæã®åãçµã¿ (English available)
Recruiting at Mercari
At Mercari Group, we value empathizing with and embodying the mission and values ââof the Group and each company. To promote the creation of an organization that maximizes the total amount of value exhibited by all members, we would like to understand the experience and skills of each candidate as accurately as possible.
Recruiting cycle at Mercari Group
- Application screening
- Skill assessment: For engineering positions, you will be asked to complete a skill assessment on HackerRank or GitHub. For non-engineering positions, you may be asked to complete an assessment depending on the position. (The timing of the assessment may coincide with the interview process.)
- Interview: The number of interviews may vary depending on the position.
- Reference check: We will ask for online references around the timing of the final interview.
- Offer: Offers will be determined carefully in consideration of the final interview and the reference check.
ãLearn more about our recruiting process here.
Equal Opportunity Hiring
Here at Mercari, we work to realize a world in which no oneâs potential is limited by their background and everyone has the opportunity to freely create value. We also firmly believe that a mindset of Inclusion & Diversity is essential for us to achieve our mission.
This, of course, extends to our hiring practices as well. Mercari is committed to eliminating discrimination based on age, gender, sexual orientation, race, religion, physical disability, and other such factors so that anyone who shares our mission and values can join us, regardless of their background. For more details, please read our I&D statement.
Please read and acknowledge our Privacy Policy prior to submitting your application.