Inayaili León is a Staff Design Program Manager at GitHub, where she focuses on design operations, documentation, and more. Previously, she was as a Senior Designer at Microsoft, working on design systems and design ops, and she led the team creating Canonical’s Vanilla design system. She writes frequently for well-known online publications and on her own web design blog, and speaks at local and international web conferences and meet-ups. She’s the co-author of “Pro CSS for High Traffic Websites” (Apress, 2011), and author of “Moving to Responsive Web Design” (Apress, 2016). She’s Panamanian Portuguese, and lives in London — her favourite city in the world.