• Developed backend microservices for the MCP Server using Java, Spring Boot, gRPC, Maven, and MySQL, improving asynchronous

request throughput by 20% through non-blocking I/O, thread pools, and back-pressure handling.

• Integrated PayPal Checkout, Merchant, and Invoicing APIs using Java Spring Boot modules with OpenAPI schemas and PostgreSQL,

reducing internal integration effort by 40% while supporting 40K to 50K API calls/hour with less than 150ms median latency.

• Designed event-driven workflows with Apache Kafka (topics, producers, consumers), Redis Streams, and MySQL transactional storage,

lowering multi-step process failure rates from 5% to 2% using durable state persistence and retry logic.

• Built internal monitoring dashboards using React, Redux Toolkit, JavaScript, and React Router, implementing async thunks to fetch

agent metrics stored in PostgreSQL and JWT-based role-protected routing for secure UI access.

• Implemented backend security with OAuth2, JWT validation, scoped API permissions, and rate limiting, leveraging MySQL for user

role and permission storage, reducing unauthorized access attempts by 35% during internal testing.

• Added observability with Prometheus (metrics exporters), Grafana (dashboards), and ELK stack (Elasticsearch, Logstash, Kibana),

tracking database query performance along with latency, throughput, and error patterns, reducing average response latency by 18%.

• Containerized and deployed services using Docker images, Kubernetes (EKS), and Helm charts, with database migrations managed via

MySQL, and automated CI/CD pipelines using GitHub Actions, Maven, Docker, reducing manual release effort by 45%.

• Managed logs, configs, metrics, and MySQL RDS backups via AWS CloudWatch, S3, and Parameter Store; increased test coverage

from 70% to 90% with JUnit, Mockito, Newman, collaborating with API, Security, and Cloud teams to triple Agent Toolkit adoption.

• Designed and developed 20+ microservices platform using Java, Spring Boot, Spring MVC, Spring Cloud, delivering financial modules

including ledger, invoicing, reconciliation, and expense management through REST APIs.

• Built the React front end with Redux Toolkit, React Hooks, React Router, JavaScript, Bootstrap and Material UI implementing validated

forms, role-based screens, and real-time financial dashboards.

• Integrated the front end with backend REST endpoints using Axios, standardized state handling with Redux, and optimized component

rendering for data-heavy transaction views.

• Implemented Spring Security with OAuth2 and JWT to enforce authentication and role-based authorization across user, auditor, and

admin workflows.

• Used Apache Kafka to enable event-driven workflows for billing, audit logging, and notification processing, reducing request

bottlenecks and improving system throughput.

• Containerized services with Docker and deployed to Kubernetes (GKE), and set up CI/CD pipelines in Jenkins with Git and Maven,

reducing deployment times and improving release consistency.

• Tuned persistence using Spring Data JPA with Hibernate and optimized Oracle SQL queries and indexes, improving financial report

execution time by 45%.

• Implemented automated tests with JUnit and Mockito, monitored production with Splunk and Grafana, and supported multi-tenant and

internationalization requirements across 6 global regions with GDPR/SOC2 compliance.