• Completed AWS Deep Dive course, gaining strong knowledge of serverless architecture and AWS core services. • Designed, developed, and maintained backend services for the Gym application using Spring Boot 3. • Implemented authentication and authorization using AWS Cognito, later transitioning to Spring Security. • Built REST APIs for user management, workout booking, coach profiles, feedback systems, and reporting functionality. • Developed and optimized the reporting feature, automating reports using AWS Lambda, DynamoDB, EventBridge, and SES. • Migrated key components from AWS Lambda to Kubernetes via the KubeRocketCI platform, enhancing scalability and cost efficiency. • Integrated RabbitMQ for messaging and MongoDB for data persistence during advanced project stages. • Contributed to CI/CD setup and deployment processes for both backend and frontend services. • Wrote and maintained unit tests, collaborating with QA engineers on test cases, automation, and regression testing. • Worked in an Agile Scrum environment, participating in sprint planning, backlog refinement, and sprint demos. • Actively engaged in team communication, providing technical input and analyzing requirements to create tasks/stories. • Presented during sprint demos, effectively showcasing the product and earning positive feedback from stakeholders.