Data QA Engineer

  • Remote OK - Anywhere in Japan
  • Full-time
  • October 6, 2023
6,000,000 - 12,000,000 JPY /yr
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Language Requirements
Japanese: Not Required 👍
English: Business Level
Minimum Experience
Mid-level or above

Job Description

We are seeking a highly skilled and motivated Data QA Engineer to join our Data Insights department. In this role, you will work closely with cross-functional agile teams and data scientists to deliver projects focused on analyzing and leveraging data. You will play a crucial role in ensuring the accuracy, reliability, and quality of our data-driven insights, while working within an iterative process to tackle projects with ambiguous requirements.

As a Data QA Engineer, you will be responsible for designing and implementing automated testing strategies that enable efficient and effective quality assurance of data products. Your expertise will be instrumental in identifying and preventing data anomalies, verifying data transformation processes, and ensuring data integrity throughout the project lifecycle.



  • Minimum of 3 years or more of experience in running and maintaining automated test cases, with a focus on data testing, data validity, and information architecture.
  • Expertise in Data Testing: Strong understanding of data testing principles, methodologies, and best practices.
  • Experienced in designing and executing test scenarios to validate data integrity, accuracy, and completeness.
  • Automation Skills: Proficiency in developing and maintaining automated test scripts using Appium, Selenium, unirest/Rest Assured for APIs and Cucumber. Familiarity with CI/CD tools such as Jenkins/Bitrise or any other.
  • SQL and Database Knowledge: Solid understanding of SQL and experience in querying and manipulating data in relational databases. Ability to write complex SQL queries to validate data integrity and perform data validations across multiple data sources.
  • Good communication skills in English to effectively communicate with various stakeholders.

※Please note that our main coding language for backend/server side is Java. During the QA selection process, you will have a coding challenge.


Preferred Qualifications

  • ETL (Extract, Transform, Load) and machine learning model testing experience. Familiarity with testing data pipelines, monitoring and alerting on model accuracy, and detecting model drift, among other tasks.
  • Data analytical skills or introductory-level statistical modeling.
  • Regulatory Compliance: Understanding of industry-specific regulations and experience in validating data compliance with regulatory requirements.
  • Ability to learn new technologies and set up new integrations with various data sources such as data lakes, object stores, and queues.
  • Experience in running performance tests using Gatling or similar tools.


PayPay 5 senses

PayPay, a fintech company that achieved more than 47M users within around 3 years since its launch in 2018 has hugely diversified employees who are from 40 different countries.

Our biggest competitor is "cash". We are seeking for people who can accept this challenge positively, brush up the product at a tremendous speed that other companies could never achieve, and who are passionate about promoting and spreading such a financial life platform in a short time along with professionalism.

PayPay’s policies during COVID-19 are as follows:

  • PayPay has been transitioning to remote work to ensure employees safety during the pandemic, and we’ll continue this even after it subsides.

  • While we’re open to considering engineers looking to relocate to Japan, travel restrictions have made it difficult to give a clear timeframe for relocation.

  • Until COVID-19 is settled and we're ready to issue visas, you can start working remotely from abroad.

View PayPay's company page

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Data QA Engineer at PayPay