A Components Developer designs, creates, and implements software components, which are individual parts of larger software systems. They work closely with software architects and developers to understand the system's requirements and specifications. Their tasks include writing clean, scalable code using .NET or other programming languages, testing and deploying applications and systems, revising, updating, and debugging code, and developing technical interfaces, specifications, and architecture. They also need to use models and methodologies to create, maintain, and improve software components, ensuring they integrate well with the system and provide optimal performance.