So, what is the main difference? The core distinction is the focus of the roles. QA engineers ensure that software products meet the market’s standards and the user’s needs. They evaluate whether the app and its features are functional, safe, and intuitive for users. SDETs, however, are responsible for designing, developing, and maintaining automated test scripts and frameworks. They use programming languages such as Java or Python. https://testpro.io/what-is-the-difference-between-sdet-and-qa/