During my tenure at Sennatech, I led and contributed to the development of numerous RESTful APIs using Spring Boot in Java. I was responsible for the entire lifecycle of the APIs, from planning and implementation to maintenance and optimization, adopting a hexagonal architecture to ensure a well-structured and modular software design.My main responsibilities included:- Designing and implementing robust and scalable APIs that facilitated efficient integration of complex systems.- Applying hexagonal architecture to decouple business logic code from external infrastructures, enhancing system maintainability and testability.- Employing test-driven development practices to ensure the continuous delivery of high-quality software without significant disruptions.- Documenting all APIs in detail using the Open API specification, which allowed for clear understanding and facilitated collaboration between front-end and back-end teams.- Managing code repositories using Git, including reviewing pull requests to maintain consistent and high-quality coding standards.- Integrating and managing cloud infrastructures using Azure Cloud, including deploying and managing WebApps for application hosting, Function Apps for serverless function processing, and EventHubs for large-scale event management, significantly increasing the efficiency and scalability of the developed solutions.This experience not only deepened my understanding of design standards and security practices for APIs but also reinforced my ability to work in agile and collaborative environments, with a strong focus on innovation and efficient use of cloud resources.