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Jonnie Lappen is a Senior Frontend Developer at Cloudflare since July 2023, specializing in design systems. Previously, Jonnie served as a Senior Software Engineer at PetSmart from July 2019 to July 2023, where responsibilities included championing and maintaining the Sparky design system, PetSmart's first shared NPM package. Prior experience includes a Full Stack Developer role at DeMark Analytics LLC from May 2014 to January 2019, focusing on the development of a financial charting and analytics platform using tools like GraphQL, Node, and React/Redux. Additionally, Jonnie worked as a Quantitative Analyst at Aquifer Capital, LLC (May 2012 - April 2014), engaging in trading systems backtesting and data management. Early career roles included Media Manager and Writing Consultant at the National Center for Policy Analysis, Strategic Development Intern at Maricopa Integrated Health System, and Debate Coach at Brophy College Preparatory. Jonnie holds a Certificate in Computational Finance from the University of Washington and a Bachelor's Degree in Geographic Information Science and Cartography from Arizona State University.