Software Engineer (QA Engineer) - Mercari

  • Tokyo
  • Remote OK - Anywhere in Japan
  • Full-time
  • October 18, 2023
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Language Requirements
Japanese: Not Required 👍
English: Business Level
Minimum Experience
Mid-level or above

Team’s Mission / Work Responsibilities

Team mission:

A QA Engineer is responsible for ensuring quality is built early on by working closely with the software engineers (SWEs) and unleashing their potential to achieve quality by following testing best practices. Additionally, achieving the best quality of software products by debugging them through the use of systematic tests. This includes developing and writing automated tests, defining test processes, creating software test plans and programs for testing. The QA engineer also analyzes and writes test standards and procedures, maintaining documentation of test results to assist in debugging and modification of the software.

The engineer analyzes test results to ensure existing functionality and recommends corrective action. In case of any issues, they consult with development engineers to resolve the problems. Additionally, the engineer provides feedback in preparation of technical appraisals of programming languages, systems, and computation software. The ultimate goal is to develop, apply, and maintain quality standards for a company’s software products.

Overall, the Software QA engineer is a critical role that helps ensure that the company's software products are of high quality, reliable, and meet customer satisfaction.


Specific work responsibilities include the following:

  • Developing and executing test cases and test plans to ensure that software is properly tested and approved based on business requirements.
  • Identifying, documenting, and tracking defects and issues in the software and working with developers to resolve them.
  • Collaborating with the development team to ensure that testing procedures are integrated with the software development process and are aligned with the company's overall product quality standards.
  • Monitoring and reporting on software quality/testing metrics to ensure that development teams are meeting established goals and objectives.
  • Continually improving quality control processes and procedures to increase efficiency and accuracy.
  • Participating in the development of software products throughout its lifecycle - including design, development, testing, release, maintenance and support.
  • Keeping abreast of emerging trends, technologies, and tools related to testing techniques and methods
  • Communicating and working with product managers, developers, and other stakeholders to ensure that the product is meeting the necessary quality standards.


Unique and Bold Challenges

  • You will be responsible for quality assurance of the Mercari app, a marketplace platform with over 20 million monthly active users.
  • Implement a mindset where quality assurance is engineering and teams responsibility
  • Involved in tasks such as understanding customer issues, developing processes, analyzing data, and creating quality guidelines to assure overall development process quality.
  • This role allows you to consider quality from the customer's perspective and build quality assurance from scratch.


Required Qualifications

  • Shared understanding and belief in our company’s mission and values
  • Solid experience in the following areas:
    • Testing mobile & web applications, including test design, implementation, optimization and test management.
    • Experience in Web/Mobile apps UI testing and/or API testing.
    • Creating/programming automated tests, for at least one of the following platforms:
      • Android
      • iOS
      • API
      • Web
  • Experience in effectively resolving issues and enhancing processes within your team.
  • Communication, collaboration, and problem-solving in team environments.
  • QA experience within an Agile Scrum-based development process.


Preferred Qualifications

  • Experience in using tools such as Jetpack Compose, XCUITest, Jest and PlayWright.
  • Experience working in a CI/CD environment.
  • Experience in web / mobile apps or backend development.
  • Experience in test tool selection and its development.
  • Experience with e-commerce platforms and services.
  • Experience in performance testing, security testing, and internationalization testing.

Largest C2C marketplace in Japan and Japan's first tech unicorn, Mercari is aiming to become a truly global tech company. Their app allows anyone with a smartphone to easily sell items they no longer need, providing a new and unique user experience.

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.

View Mercari's company page

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Software Engineer (QA Engineer) - Mercari at Mercari