A functional testing developer is responsible for conducting tests to ensure the functionality of software applications. They design and execute test cases based on user requirements, identifying any potential issues or bugs. Their role involves analyzing the software’s functionality, user interface, security, and overall performance. They also verify that the software behaves as expected under different scenarios and inputs. Moreover, they collaborate closely with development teams to correct any detected issues, and they may also be involved in automating testing processes. Ultimately, their goal is to ensure the software product meets its intended purpose and provides a quality user experience.