A Delphi Builds developer is responsible for creating, testing, and maintaining software applications using the Delphi programming language. They design and implement user interfaces, develop server-side logic, and ensure high performance and responsiveness. They also work on bug fixing and improving application performance. They collaborate with other team members to define, design, and ship new features. Additionally, they must understand customer requirements and translate them into application features. They're also expected to stay updated with new technology trends and apply them into operations and activities. Their role is crucial in every phase of the software development lifecycle.