An HP QuickTest Professional (QTP) developer is primarily responsible for automating the testing process of software applications. They design, develop, and execute automated scripts using QTP, a leading test automation tool. Their duties include identifying, documenting, and tracking software bugs, maintaining test results, and reporting any issues to the software development team. They also collaborate with team members to develop effective strategies and test plans. Furthermore, they must keep up-to-date with new testing tools and strategies, enhance the existing automation framework, and contribute to all phases of the testing lifecycle, ensuring the delivery of high-quality software products.