1.    Test Planning and Design: Creating detailed test plans, test cases, and test scripts based on project requirements and specifications.

    2.    Manual and Automated Testing: Performing both manual testing (exploring the software as a user would) and automated testing (using scripts or tools) to identify bugs, performance issues, and other defects.

    3.    Bug Reporting: Documenting issues, defects, and inconsistencies found during testing and tracking them through bug-tracking systems like JIRA.

    4.    Collaboration with Developers: Working closely with software developers to understand features and bug fixes, helping them reproduce issues, and validating corrections.

    5.    Regression Testing: Retesting software after bugs are fixed to ensure new changes haven’t introduced other issues.

    6.    Performance, Security, and Usability Testing: Checking how the software performs under different conditions, ensuring it’s secure, and assessing the user experience.

    7.    Test Automation: Writing and maintaining scripts that can run automated tests for repeated testing tasks.

    8.    Documentation and Reporting: Keeping records of test results, providing detailed feedback to stakeholders, and contributing to overall project documentation.

The goal of a QA Tester Engineer is to ensure that software is free of critical bugs, performs efficiently, and provides a seamless user experience.