Youngsun Paik, Quality Assurance Developer in Seattle, WA, United States
Youngsun Paik

Quality Assurance Developer in Seattle, WA, United States

Member since May 28, 2020
Youngsun is a software test engineer with a year of software developer experience in addition to his testing and QA expertise. He is now a professional test automation engineer using Python/Selenium as a result of his varied experiences. He is especially good at establishing a test suite from scratch using Selenium for automation and Postman for API testing. Also, he is never hesitant in communicating with the team members in order to resolve issues in a timely manner.
Youngsun is now available for hire




Seattle, WA, United States



Preferred Environment

Web, Windows, Linux, MacOS

The most amazing...

...thing I've developed is an automation test script for the end-to-end testing of an eCommerce web application.


  • Software Engineer

    2016 - 2017
    • Developed Teespring Shopping and Teespring Seller apps from scratch for iOS using Swift.
    • Implemented Google Places API for address validation in Teespring Shopping’s checkout page.
    • Built an order tracking page in Teespring Shopping along with Rails API endpoint.
    • Built the Android version of the Teespring Seller app using React Native.
    • Developed a campaign detail page in Teespring Seller, which shows performance and variation of products.
    • Built Rails API endpoints for checking email opt-in/out and implemented it on the Teespring Seller app so sellers could send thank-you messages to buyers who have opted in for email marketing.
    Technologies: React Native, Ruby, Swift
  • Software QA Engineer

    2015 - 2016
    • Automated launching campaigns, purchasing products, and changing settings for a web application using Selenium.
    • Implemented Selenium Page Object Model (POM) for readability and maintainability.
    • Tested Teespring’s REST API using Postman and Insomnia.
    • Organized test plans and issues on Jira and documented edge cases on Google Docs.
    • Collaborated on maintaining the wiki pages for projects.
    • Designed test cases and made documentation for Teespring and Shopify integration from scratch.
    • Earned the highest performance review scores in the QA team.
    Technologies: RSpec, QA Automation, Page Object Model (POM), REST APIs, Jira, Ruby, Selenium
  • Software Test Engineer

    2014 - 2014
    Movial Corporation
    • Performed integration and regression testing for multiple T-Mobile applications such as Device Unlock and Visual Voicemail.
    • Designed test cases for Visual Voicemail using TestLink and Google Docs.
    • Reported issues on Jira with detailed information, including screenshot and reproduction steps.
    • Created and maintained documentation for setting up the environment and procedures of testing applications on Android devices.
    Technologies: Manual Testing, Jira, TestLink
  • Software Test Engineer

    2012 - 2013
    Device Inside Inc.
    • Worked with Samsung Telecommunications America (STA) Mobile Engineering Lab engineers to track down issues.
    • Reported issues with logs, dump files, reproduction routes, and expected results to the STA R&D team.
    • Performed stress tests on the latest Samsung devices.
    • Compiled failure reports to STA engineers with the purpose of obtaining a waiver and lowering severity level.
    Technologies: Stress Testing, Manual Testing


  • My Thangs

    This is a personal project I published on Apple Appstore. My Thangs is a home inventory application in which users can upload items with a photo, description, location, category, and quantity. The stack I used to build this app included Swift and Google Firebase.

  • Teespring

    Teespring is an eCommerce website that sells custom-designed shirts and apparel. After thorough test processes, my team developed and maintained automation scripts using Selenium. I automated the campaign launching flow, product purchase flow, and settings flow. I also tested Teepspring's API using Postman and Insomnia.

  • Automation Practice (Selenium - Python)

    Automation practice repo using Selenium and Python. It tests, a fake eCommerce site for testing. There are Page Object Models to organize the code. Test cases use functions and properties from POM to run the tests.


  • Frameworks

    Selenium, React Native
  • Tools

    Jira, Git, PyCharm, RSpec
  • Platforms

    MacOS, iOS, TestLink, Linux, Windows, Web
  • Other

    QA Automation, Quality Assurance (QA), Web App Testing, Manual QA
  • Libraries/APIs

  • Languages

    Python, JavaScript, Swift, Ruby
  • Paradigms

    Manual Testing, Stress Testing, Page Object Model (POM)


  • Bachelor's Degree in International Studies
    2005 - 2011
    University of Washington - Seattle, WA


  • Certified Tester, Foundation Level (ISTQB)
    AT*SQA (Number: 12-CTFL-01809-USA)

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