John Leider is the creator of Vuetify, a Vue UI library with a material design component framework. He emphasizes community and connection in growing the user base of Vuetify. For developers on the fence about contributing to open source, he advises starting with projects that interest them or are part of their development stack. John suggests surrounding oneself with smart people for support and maintaining momentum in open source contributions. Quality is a top priority for Vuetify, which relies on an engaged development and contribution team. He believes maintainers are public servants and cherishes the opportunity to help others through open source projects.