At PayPal, I actively shaped the design and implementation of mission-critical microservices, crucial for real-time transaction processing, leveraging Java 17, Spring Boot, and Spring Security to ensure robust and secure operations. I developed high-volume Kafka-based event pipelines that process over 5 million messages daily, significantly enhancing transaction status updates, reconciliation, and downstream data enrichment.

My contributions extended to integrating AWS Lambda, RDS, and S3 for scalable serverless functions, efficient data staging, and secure archival. To optimize inter-service communication, I introduced gRPC-based internal service contracts, which effectively reduced serialization overhead and improved latency. I was responsible for deploying and operating services within Kubernetes (EKS), bolstering monitoring capabilities with Prometheus and Grafana, and enhancing performance insights through OpenTelemetry for distributed tracing.

A key focus involved implementing stringent PCI-DSS controls, including secure credential storage and audit logging, alongside expanding OAuth2-based access flows and zero-trust service-to-service authentication. I championed CI/CD pipelines using GitHub Actions and Terraform, a direct effort that increased deployment frequency by 40%. Furthermore, I evaluated observability tooling and contributed to SLO instrumentation in close collaboration with the SRE team. I also spearheaded the pilot adoption of GitHub Copilot in code reviews and POC tasks, promoting awareness of AI-assisted development, and mentored engineers on JVM tuning, DDD, and secure coding practices.

As a Full Stack Developer at Oracle, I engineered backend services for internal Procure-to-Pay automation using Java 11, Spring Boot, and Hibernate, which ultimately boosted invoice throughput by 30%. I designed REST APIs for essential functions like vendor onboarding, approvals, and audit trails, and led the strategic evaluation and migration of internal APIs towards GraphQL to accommodate dynamic client-side queries. My frontend contributions included developing features using Angular. I crafted asynchronous flows with RabbitMQ and Apache Camel, and critically evaluated transition options to Apache Kafka for enhanced fault tolerance. My work also involved optimizing Oracle DB indexes and queries, which successfully cut dashboard latency by 50%, and building robust test automation using Testcontainers, WireMock, and integrating contract testing with Pact. I actively collaborated with the UX team on vendor self-service features and facilitated usability testing sessions. Additionally, I assisted with cloud migration planning to AWS, focusing on EC2, RDS, and S3, contributing to cost metrics and Terraform IaC setup.

Specialized in modernizing enterprise systems and accelerating software delivery in regulated industries like insurance. Accelerated release cycles by 60% by modernizing insurance policy systems using Spring Boot, Angular, and MySQL. Led migration to Google Cloud Platform, leveraging Compute Engine, Cloud SQL, Cloud Pub/Sub, and Cloud Monitoring to build scalable and observable microservices. Built real-time dashboards for agents with Angular, integrating charts, filters, and notifications; delivered a React proof-of-concept to support future UI modernization. Integrated external data providers (e.g., credit bureaus) via REST APIs and explored WebSocket APIs for real-time underwriting updates. Improved system performance by tuning JVM memory and concurrency issues using VisualVM and Java Flight Recorder, significantly reducing GC pause times in production. Contributed to vendor evaluations for observability tooling, providing insights that influenced tool adoption across multiple departments. Participated in agile product planning sessions using KPIs like drop-off rate and approval SLAs to inform technical prioritization. Authored technical documentation and UML diagrams, onboarded new engineers, and shared knowledge through internal tech blogs and StackOverflow for Teams.