Keji Yuan

• Set up Webpack configurations for multiple environments (development, production, testing) and implemented code

splitting and lazy loading to optimize page load speeds.

• Developed new features like reusable components for customized button, pop-up dialog, drop down menu and so on and

implement the visualization in Chart.js for administrators.

• Used Babel to compile ES6+ code to ES5, ensuring code compatibility with older browsers.

• Implemented Content Security Policy (CSP) to mitigate the risk of cross-site scripting (XSS) attacks.

• Engaged into implementation of restful API by Nodejs Express and mongoose and did code review for developers and

wrote documentations for new technologies.

• Set up CI/CD pipeline for whole project and manage the deployment on AWS.

• Led a team of 10+ junior engineers to construct a website and helped scale the technical team from 1 to 20+ engineers.

• Developed a comprehensive hospital management system to streamline hospital operations and patient care in

collaboration with a multidisciplinary team of over 60 individuals.

• Worked closely with product manager, back-end engineers and UX designers and adjusted the front-end designs to

cater to improved back-end performance in project tracking software JIRA.

• Transitioned the system architecture from Redux to the Pub-Sub design pattern with custom React hooks. This changed

a performance boost of 30% in the Contacts and Meeting modules.

• Integrated the third-party Zoom API to facilitate a seamless real-time communication interface. This allowed doctors to

consult with patients remotely, enhancing the patient experience.

• Implemented the whole authentication features, including protected router, API validation, session control.

• Analyze the data from backend API and visualize the data in D3 library.

• Repackage UI component library for material-ui so that satisfy the UX design and used by whole team.

• Delivered high-quality systems and features for customers by translating the complex functional and technical requirements into detailed architecture and design and implementing critical parts of it.

• Integrated FullCalendar with React API to provide spa institutions with a dynamic scheduling system, aiding in effective

network planning. Diagnosed and rectified numerous performance issues on the front-end. Through these optimizations,

achieved faster page loads, reduced lag, and enhanced the overall responsiveness of the application.

• Utilized Java with the Spring Boot framework to design, implement and maintain a series of RESTful APIs.

• Delved deep into SQL queries, leading to a 50% performance improvement in SQL-related tasks.

• Worked in an agile development environment, collaborating closely with other developers, product managers, and

stakeholders to gather requirements, provide updates, and receive feedback.