About

Leonard Li is a highly skilled Staff Software Engineer at PayPal with more than 6 years of professional experience in designing and developing web, mobile, and server applications. He is an expert in Object-Oriented Programming with JavaScript, Java, Objective-C, and C++, and has a strong ability to analyze and implement algorithms, data structures, and design patterns. Leonard is proficient in building websites and web applications using HTML, CSS, and JavaScript with React, Redux, and Material-UI. He is also experienced in UI design using image processing software such as Photoshop, Illustrator, and Sketch. Leonard has expertise in implementing graphic and animation effects on HTML5 canvas or SVG using D3Js and ChartJs. He is skilled in developing RESTful API HTTP servers or GraphQL API servers for web and mobile applications using Node.js and Express.js frameworks. He has experience in using JSON, a lightweight data-interchange format, to build collections of name/value pairs and ordered lists of values. Leonard is also knowledgeable in developing chatting applications and servers using the socket.io package. Leonard has expert knowledge of data schema normalization for using relational DBMS MySQL, SQLite, and Oracle. He also has experience in database structure design for using NoSQL MongoDB and processing big data using MapReduce. He is a good team player and highly motivated self-starter with excellent communication, analytical, problem-solving, trouble-shooting, and debugging skills. Leonard is skilled in all phases of Software Development Life Cycle (SDLC), including analysis, design, development, documentation, testing, deployment, version control, and production support. He is also good at pair programming and introducing new techniques to the team. Before joining PayPal, Leonard worked as a Sr. Software Engineer at Simility and a Web Developer at Edcast. He has a Master of Science (MS) degree in Computer Science from the University of Bridgeport. Leonard's tech stack includes Software Engineering, Senior Software Engineering, Web Development, JavaScript, UI Design, Mobile Development, Big Data, Objective-C, Normalization, Image Processing, Testing, MapReduce, Frontend Development, Designing, MySQL, NoSQL, MongoDB, Redux, NodeJS, and Backend Development. With a relevant experience of 11.86 years, Leonard is an expert in his field and an asset to any organization he works with.