Developed an API Gateway using Spring Cloud Gateway and AWS Cognito to secure microservices. The gateway acts as both a resource server (validating JWT tokens) and an OAuth2 client (authenticating users).I also developed an AI-Powered Email Outreach Platform using Java and Spring WebFlux for its non-blocking capabilities to send and manage emails using SendGrid. The platform tracks email status whether email has been delivered,, marked as a spam or opened through SendGrid’s webhooks.I set up a dedicated reply domain with SendGrid’s inbound parsing to automatically handle user replies within the application.I added AI features that allow users to upload large CSV files, where the AI generates personalized email content for each contact. Emails can be sent automatically or reviewed and sent manually. During development, I worked in an agile Responsible for DevOps tasks, deploying and monitoring applications primarily on AWS.Using Prometheus and Alertmanager for monitoring, setting up real-time Slack notifications for critical issues like application losing database connection, high CPU, memory, disk, or network usage, and too many HTTP requests within a certain period.This monitoring helps the team, including non-technical members like the Scrum Master, stay informed and respond quickly to issues.