Harish Khangar

Engineer ll @American Express

GB

Roles and Responsibilities:Contributed to critical payment network services — including authorization, clearing, and settlement — by contributing to backend development using Java, Spring Boot, and microservices, kafkaImproved system performance and reliability by identifying bottlenecks, optimizing service interactions, and modernizing legacy componentsLed migration efforts from monolithic components to scalable microservices, and making the platform more scalable and easier to maintainContributed to secure tokenization features to protect sensitive card data, ensuring alignment with PCI-DSS and internal compliance standardsTook initiative to document architecture and workflows, making it easier for new team members to onboard and for cross-team collaboration to flowMentored junior engineers and collaborated closely with cross-functional teams to solve complex issues and drive process improvements