Jacek Maciąg, Quality Assurance Developer in Kraków, Poland
Jacek Maciąg

Quality Assurance Developer in Kraków, Poland

Member since September 20, 2019
Jacek is a dedicated and scrupulous (a perfectionist) tester with experience in both back-end and front-end. He primarily focuses on Java, but he also enjoys learning and exploring new technologies. Knowledge is power.
Jacek is now available for hire



  • Quality Assurance (QA) 5 years
  • SQL 4 years
  • Object-oriented Programming (OOP) 4 years
  • Selenium 4 years
  • Java 4 years
  • Git 3 years
  • REST APIs 3 years
  • Cucumber 2 years


Kraków, Poland



Preferred Environment

IntelliJ IDEA, Linux, Windows

The most amazing...

...project I've worked on was a market price trend recognition and forecasting tool.


  • Quality Assurance

    2017 - PRESENT
    • Performed front-end and back-end testing of over 20 applications (functional, integration, and end-to-end).
    • Maintained test environment (deployments, setup, and debugging).
    • Developed test framework and tests cases for a Ruby test framework running across various environments.
    • Debugged (with Splunk and Sentry) and reported defects (via Rally) for multiple applications across multiple delivery pipelines.
    • Worked remotely with a team located across different countries and continents.
    Technologies: Grafana, Splunk, SemaphoreCI, Jenkins, Deis, Kubernetes, Java, Scala, JavaScript, Ruby
  • Software Developer in Test

    2017 - 2017
    Akamai Technologies
    • Developed automated Selenium front end test framework (Java, TestNG, Selenium) for a client-facing reporting tool.
    • Created automated tests (REST Assured/Retrofit) for an application serving multiple clients.
    • Reported and analyzed defects before deployment.
    • Helped with onboarding and training employees.
    • Managed the test framework development.
    Technologies: Selenium, Java
  • Quality Control Analyst

    2015 - 2017
    Brown Brothers Harriman
    • Designed, prepared, and executed both manual and automated test scripts.
    • Wrote test plan and strategy documents.
    • Completed bug reporting and analysis.
    • Developed an automated test framework using Java, Selenium, Serenity + Jenkins/Docker for the bank’s major corporate actions systems.
    • Shared knowledge and provided help to non-business team members based on previous experience.
    • Provided assistance to UAT and production environment users.
    Technologies: Jenkins, Selenium, Java


  • Opes

    A collection of microservices forecasting price and automating order execution of commodities/forex built with Java, Spring Boot, Postgres, Python, and Flask.


  • Languages

    Java, Gherkin, SQL, Ruby, JavaScript, Scala, Python, Bash
  • Frameworks

    Selenium, JUnit, TestNG, Spring Boot, Flask
  • Tools

    Cucumber, IntelliJ IDEA, Postman, Jira, Rally, Confluence, Git, GitHub, Jenkins, SemaphoreCI, Grafana, DataGrip, PyCharm, Sublime Text 3, Splunk, GitLab, Travis CI, Sentry, Slack
  • Other

    Quality Assurance (QA), QA Testing, Software QA, Manual QA, QA Automation, Website QA
  • Libraries/APIs

    Deis, REST APIs
  • Paradigms

    Object-oriented Programming (OOP), Agile, Waterfall Development
  • Platforms

    Linux, Windows, Kubernetes, Docker
  • Storage

    MySQL, PostgreSQL, MongoDB, Amazon S3 (AWS S3)


  • Post-graduate Degree in Systems Design
    2015 - 2016
    Akademia Górniczo-Hutnicza im.S.Staszica w Krakowie - Kraków, Poland
  • Master's Degree in International Relations
    2006 - 2011
    Krakowska Akademia im. Andrzeja Frycza Modrzewskiego - Kraków, Poland


  • International English Language Testing System (IELTS) General Training
    British Council
  • ISTQB Certified Tester: Foundation Level
    International Software Testing Qualifications Board

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