A Borland Delphi developer designs, codes, tests, and debugs software applications using the Delphi programming language. They create user-friendly interfaces, optimize application performance, and ensure software compatibility with various operating systems. They often work with databases, so they need to understand SQL and data manipulation. They also troubleshoot and resolve programming issues, maintain code quality, and document development processes. Developers may also collaborate with other team members such as analysts and designers to understand requirements and provide optimal software solutions. Their goal is to build high-quality, reliable, and efficient applications to meet user or business needs.