Longfei Li Email & Phone Number

Plano, Texas, United States

Transformed legacy vanilla JavaScript into modern React applications using singleSPA for navigation, and implemented a smart component for bundle size optimization, tree shaking, and code splitting, significantly enhancing application performance and load times.Implemented Split.io feature flags to transition users to a full-page experience in V3 service and collaborated with UI/UX and DPS teams to enhance visual elements in the V4 service, improving overall user engagement and experience.Collaborated with MDS-WEB-UI teams to integrate GraphQL for efficient data handling, utilized TanStack/React Query, and implemented Next.js for server-side rendering, contributing to the modernization of the application architecture.Resolved software defects, developed comprehensive unit tests with Jest and React Testing Library, and actively participated in agile ceremonies to ensure the successful rollout of features and continuous improvement of the application.Developed and optimized highly reusable, scalable React components, enabling consistent UI patterns across multiple business applications. Collaborated with cross-functional teams to ensure component flexibility and ease of integration, resulting in streamlined development processes, reduced redundancy, and improved code maintainability. Leveraged component libraries and Storybook to document usage guidelines, increasing accessibility for other teams and accelerating feature delivery across business units.

Chicago, Illinois, United States

Developed and maintained large-scale JavaScript applications using ReactJS, Redux, and Flux, focusing on creating reusable components, ensuring cross-browser compatibility, and implementing rich UI functionalities such as form validation, CRUD operations, and advanced user input handling.Integrated Google Location API to enable users to find restaurant locations, and developed robust call and reservation systems, enhancing customer interaction and streamlining restaurant operations; continuously monitored and optimized application performance using TypeScript, JavaScript, and RESTful APIs.Collaborated with cross-functional teams to integrate JavaScript libraries like React-Bootstrap and Highcharts, and optimized web performance for SPAs, while adhering to Agile and Scrum methodologies for efficient project management and continuous delivery.Leveraged full-stack development experience by utilizing ReactJS and NodeJS for building and securing RESTful APIs, managing backend data with MongoDB, and implementing automated testing strategies with Mocha and Jasmine, ensuring high-quality, maintainable code through GitHub and Jira for version control and issue tracking.

Austin, Texas, United States

Engineered and maintained robust, responsive single-page applications and employee portals using React, HTML, CSS, and JavaScript, with a focus on mobile-first strategies, cross-browser compatibility, and backend integration with Java and Spring Boot.Collaborated with cross-functional teams, including project managers, UI/UX designers, and backend developers, to design and implement scalable solutions, ensuring seamless integration between front-end and back-end systems.Developed and optimized software features using TypeScript, JavaScript, RESTful APIs, and Java with Spring Boot; built reusable components, and ensured efficient data processing and system performance.Designed and implemented automated testing strategies to ensure code quality and reliability; collaborated with DevOps teams to streamline deployment processes and enhance continuous integration and delivery (CI/CD) pipelines.

San Jose, California, United States

Developed and architected large-scale JavaScript applications using React and Redux, focusing on creating reusable UI components and enhancing user experience for employees and benefit applications.Redesigned an employee-benefit application in collaboration with HR, introducing new features and data visualization for improved usability and informational content.Connected and integrated Salesforce with internal databases and MongoDB using Salesforce API, enabling store managers to better manage inventories and storage facilities with enhanced insight.Built modern web applications and base layouts using HTML, CSS, and JavaScript, along with creating automated messaging systems to improve communication between store managers and clients.