Haebin Lee Email & Phone Number

Cerritos, California, United States

Cerritos, California, United States

• Led authentication using Nest.js and Typescript, scaling to thousands of users, ensuring high performance in microservice architecture.
• Implemented establishing user authentication using Next.js and Typescript, scaling to thousands of users containerized app with Docker.
• Integrated Gemini API and Vertex AI to automate personalized fitness schedules, projecting a 70% reduction in schedule creation time.
• Migrated deployment to App Engine in Google Cloud using blue-green strategies, achieving 99.9% uptime and 40% faster load times.
• Engineered data-intensive React.js dashboard, slashing render time 40% with custom hooks and Context API implementation.

San Francisco, California, United States

• Provided assistance to students enrolled in computer science courses, aiding them with assignments, programming, and math.

Seoul, South Korea

• Led payment system architecture using Domain-Driven Design(DDD), creating scalable microservices for real-time event-driven processing.
• Boosted delivery service by 26% through A/B testing and JPA (ORM) optimization in Spring Boot, reducing database query time by 40%.
• Optimized API performance, reducing response time 40% for 5M+ records via query indexing in PostgreSQL with Object-Oriented principle.
• Leveraged Spring Batch to process 10M+ data entries, implementing chunk-based processing and parallel execution, achieving 60% faster.
• Orchestrated zero-downtime updates for 60+ AWS Elastic Beanstalk servers, including contract and payment system achieving 99% uptime

Busan, South Korea

• Reduced API response time for scraping data from 180s to 60s by implementing parallel processing with Java’s Executor Service.
• Engineered expense dashboard using React.js, rechart, cutting load time by 82% via daily batch processing, benefiting 500+ daily users.
• Upgraded encryption to RSA, implementing unique customer key, enhancing data security, in collaboration with data governance team.
• Optimized Elasticsearch indexing for e-contracts, enabling efficient word search and utilized Kibana for real-time data monitoring.
• Facilitated new hire onboarding, conducting code reviews, resulting 25% faster integration and improved team productivity.

Seoul, South Korea

• Implemented real-time chat using Realm and infinite scrolling, boosting user engagement and reducing load times by 40%.
• Optimized app performance using SQLite for local caching and streamlined API calls, resulting in 30% faster data retrieval.

Ho Chi Minh City, Vietnam

• Presented an Android human resource prototype app for a Vietnamese factory, leading to acquisition of a formal contract.
• Constructed an app for managing overtime work utilizing Java and integrating a web view with HTML, CSS, and JavaScript.
• Designed a responsive UI to both tablets and smartphones, enhancing cross-device compatibility and user engagement.

Master'S Degree, Computer Science

Bachelor Of Science - Bs, Computer Science