What is tester developer?

A tester developer is someone who has experience in both software testing and software development. They have skills in coding, debugging, and creating automated tests and tools to ensure software quality. Tester developers know how to design and execute test cases and scenarios, identify and report defects, and work with developers to resolve issues. They also collaborate with project managers, product owners, and other stakeholders to ensure the software meets customer expectations and business requirements. Tester developers are generally proficient in programming languages such as Java, Python, C++, or JavaScript, and have experience with testing frameworks and tools such as Selenium, TestNG, JUnit, or Cucumber.