QA Engineer - US App

This position requires English language ability. JD is available in English only.

本ポジションは日本語JDの用意がありません。

IntroductionCirculate 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 Group’s mission, see .

Equal Opportunity Hiring

Here at Mercari, we work to realize a world in which no one’s 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 .

Team’s Mission / Work Responsibilities

Ensure the best-quality software is shipped to our users and provide a world-class user experience when buying or selling on Mercari. Quality is at the heart of everything we do, and we want you to join us in building the best C2C marketplace possible.

(Learn more about Mercari's mission and values .)

We are seeking an experienced QA Engineer preferably with experience in React Native Detox testing to join our team. Through comprehensive testing strategies and tools, you will play a pivotal role in ensuring the quality and reliability of our mobile applications. 

Specific work responsibilities include the following:

• Design, develop, and maintain robust E2E test suite using Detox for React Native applications.
• Execute manual and automated test cases, analyze results, and report findings to development and product teams.
• Collaborate with cross-functional teams to define testing strategies and ensure seamless integration with development workflows.
• Troubleshoot and resolve issues related to test suites, continuously improving stability and performance.
• Implement CI/CD pipelines to automate testing processes and enhance test coverage.
• Document and communicate testing procedures, best practices, and reports.

Unique and Bold Challenges

• Collaborate with a dynamic Tokyo-based team and engage with colleagues across the US to drive Mercari’s mission of facilitating buying and selling, preparing for future challenges in a global context.
• Actively contribute innovative ideas to enhance our engineering community.
• Develop a comprehensive knowledge of the US market to secure Mercari’s growth and relevance.
• Acquire new domain expertise, skills, and technologies that are valuable and applicable to our evolving needs.
  

Required Qualifications

• Strong understanding of testing frameworks and tools, and experience in writing automated test scripts preferrably with React Native Detox framework.
• 5 or more years of experience in QA engineering with a focus on Android & iOS mobile application testing.
• Familiarity with CI/CD tools and processes.
• Experience with debugging tools and methodologies in mobile app development.
• Excellent problem-solving skills and attention to detail.
• Strong communication skills and ability to work collaboratively in a hybrid team environment.
  

Preferred Qualifications

• Experience with React Native developing and testing on both iOS and Android platforms.
• Familiarity with Agile/Scrum development methodologies.
• Experience with other testing tools like Cypress or Playwright
• Having example Detox tests even for simple personal projects or demos

Screening Criteria

• Depth of experience in QA
• QA technical prowess
• Leadership and Soft skills

(See for details.)

Language Requirements

• English: Proficient (CEFR - B2) 
• Japanese: Basic (CEFR - A2) optional

Click for more information about CEFR.

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Working ConditionsEmployment Status

Full-time

• Probationary period: First 3 months after joining the company. (During this period your contract conditions will be the same as that of a permanent employee.)
  

Office

Roppongi

• Smoking is prohibited within our offices
• Mercari has introduced a work style policy called “.” Each member is free to choose whether they want to work in the office or work fully remote. *Exceptions made for certain kinds of work.

Work Hours

• Full flextime (no “core time” or “flex time”)
  *Does not apply to all positions

Holidays

• Two days off per week (as well as national holidays, New Year's break, etc.)
• Paid leave, congratulatory and bereavement leave, relax days, sick leave

Salary

• Annual salary paid in 12 monthly installments (including fixed overtime allowance)
• Based on skills, experience, and abilities
• Reviewed twice a year
  

Benefits

• Complete health and social insurance
• Incentive program
• Support systems, including those that benefit the employee’s family members
  .
  

Support

• Relocation support
• Language learning support
• Translation/interpretation support
  .

MediaCorporate Sites

• [Japanese]

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