Eileen Cho Email & Phone Number

- Decreased application memory load by up to 80% by implementing a configurable memcaching policy utilizing W-TinyLFU with a frequency sketch for optimal handling of various cache access patterns.- Engineered developer tool for Javascript runtime using Chrome API to easily monitor application's cache and query metrics through GUI built with React/Chart.js, enabling developers to monitor the application during production.- Integrated SHA256 hashing of queries into existing framework to implement persistent queries, allowing for a reduction in network overhead and improvement in performance and scalability.- Incorporated configuration options for caching of GraphQL query results including: options to opt in/out of client/server caching, select caching algorithms, and define query result transformation guidelines.- Increased application reliability and streamlined workflows by refactoring server-side Redis cache routers built for Deno/Oak to consistently instantiate cache and by modularizing cache to appropriately process GraphQL query results when writing/reading from the cache.

- Developed user interface using React and React Router to create single-page application to manage client routes, providing a faster and smoother user experience while navigating their itinerary dashboard.- Applied React functional components and hooks including createContext and useReducer to utilize flux architecture pattern and dynamically render relevant travel itinerary/activity details to users with reusable components.

- Utilized PostgreSQL database to store and manage highly relational data in an ACID compliant database for appropriate handling of multi-row transactions to various event related tables.- Constructed a Node.js/Express.js server to leverage the non-blocking I/O, MVC, and middleware design patterns to serve simultaneous requests from multiple users, increase scalability, and swiftly manage both a myriad of endpoints and distinct server requests within a single endpoint.

- Employed Cypress to conduct end-to-end and unit testing of authentication and OAuth features, ensuring secure authentication protocols and seamless user experience throughout application development.- Implemented OAuth and Auth + Bcrypt hashing for secure password storage to prevent data breaches and rainbow table attacks, increasing application security and reducing the risk of unauthorized access to user’s data.