A Microservices Architecture developer designs and implements software solutions divided into smaller, independent services, each running in its own process and communicating with others through APIs. They ensure scalability, speed, and efficiency by enabling services to be deployed, upgraded, scaled, and restarted independently. They also handle data consistency across services, fault isolation, and decentralized data management. They use containerization technologies like Docker and orchestration tools like Kubernetes. They work closely with DevOps for continuous integration/continuous delivery processes and collaborate with other teams to ensure system compatibility and functionality.