Software Engineer II

• Led the consolidation of 40 nano-services into 10 scalable microservices, reducing cloud and operational costs by 40% while improving system maintainability and performance. • Designed and implemented a fraud prevention system in the React UI by integrating with Accertify Care based on Karma score risk evaluation, preventing fraudulent transactions and saving $4M to date. • Developed role-based discount restriction logic in React.js using AD group validation, limiting users to a maximum of 30% discount and strengthening pricing and governance controls • Implemented dynamic configuration management using AWS AppConfig, increasing deployment efficiency by 20% and reducing release dependencies. • Shipped a GDPR-style "Revoked Consent" search mode for Korea PI compliance, built a permission-gated React UI that switches Order Search into a read-only flow wired to a dedicated read-only GraphQL API.

• Implemented a permission-based security feature that effectively restricted access to sensitive components, resulting in a 100% reduction in unauthorized access attempts. • Collaborated with cross-functional teams to implement an end-to-end Publisher-Subscription model with Java and Spring Boot, enabling real-time data handling for over 15,000 daily transactions. • Optimized the network call of a key feature, which reduced the response time by more than 50%. • Developed an intuitive drag-and-drop feature for form inputs in React.js, improving the user interaction and a 20% rise in user engagement. • Oversaw the migration from Elasticsearch to OpenSearch, ensuring zero downtime during the transition, improving search query performance by 15% and resulting in annual cost savings of $50,000.