Developed and maintained the frontend of a SaaS-based payment gateway platform using React, TypeScript, and Tailwind CSS, delivering secure and user-friendly business transaction workflows. Worked closely with product and QA teams in an agile environment to ensure PCI compliance and seamless payment experience. Gained strong familiarity with payment gateway architecture, POS systems, merchant onboarding, and transaction lifecycle (authorization, capture, settlement, refund)

Developed RESTful APIs and backend components in Java to support NFC card data processing and user profile management, enhancing security and performance across microservices. Used React, Nextjs, TypeScript and Tailwind for front-end development. Optimized Java-based backend services for scalable social networking functionality, managing high user traffic and database transactions. Implemented new features and resolved bugs in Java-based backend services, ensuring optimal performance and user experience.

Developed a web-based cloud photo album program using React, Redux, Javascript and Python. Implemented a custom Kubernetes controller to automate the deployment of MySQL and ProxySQL custom resources in order to enable 2,000+ internal developers to instantly deploy their app databases to production. Wrote several scripts to automate MySQL database failovers while maintaining master-slave replication topologies and keeping Zookeeper nodes consistent with changes.