The document discusses a career change from teaching to becoming a QA engineer. It describes why the person loved teaching but left due to stress, and how they discovered tech through an introduction to programming class and bootcamp. They then got an internship at Twitter where they performed well and were hired. The document then explains what QA engineering involves like ensuring quality, testing, and automation. It provides examples of QA tools and processes used like continuous integration, code auditing, and acceptance testing. It encourages the reader to consider a career in QA engineering.