A BaaS (Backend as a Service) developer specializes in managing the server-side of web and mobile applications. They design, implement, and manage cloud-based backend services, including databases, server scripting, API integration, user authentication, and push notifications. Their role also involves ensuring data synchronization across multiple platforms. They work with frontend developers to create a seamless user experience. BaaS developers use platforms like Firebase, Parse, AWS Amplify, which abstract complex backend needs, allowing them to focus more on the frontend and user experience. Their goal is to create efficient, scalable, and secure backend systems.