A Definition/Development developer is responsible for defining, designing, and developing software applications or systems. They work with clients or users to understand their needs, then translate these requirements into technical specifications. They write code, test and debug software, and troubleshoot issues to ensure the software performs as required. They also maintain documentation detailing the design and functionality of their applications. They often work in teams, collaborating with other developers, designers, and stakeholders to deliver a product that meets the user's needs. Their role requires strong programming skills, problem-solving abilities, and knowledge of software development methodologies.