A Katalon job typically involves using Katalon Studio, an automation testing tool, to create, execute, and maintain test scripts for web, mobile, API, and desktop applications. Professionals in this role, such as QA automation engineers or testers, use Katalon to enhance software quality by automating repetitive test cases. Responsibilities may include writing test scripts, debugging automation failures, integrating tests with CI/CD pipelines, and generating reports. Knowledge of programming languages like Java or Groovy, along with experience in Selenium or Appium, is often beneficial.