Patrik Tomas Chamelo
Senior Staff Software Engineer · IC7 · Meta
11 years building the Facebook app: design systems, UI infrastructure, and large-scale cross-functional initiatives.
Senior Staff Software Engineer · IC7 · Meta
11 years building the Facebook app: design systems, UI infrastructure, and large-scale cross-functional initiatives.
Currently leading strategic bets for the Facebook application, aiming to create a unified, consistent, and future-forward experience. Over a decade at Meta I have driven foundational design system work, large-scale app-wide initiatives, and cross-functional product execution at the highest level of the iOS engineering ladder.
Served as tech lead for the largest recent redesign of Profile, leading cross-functional execution across ~100 partners spanning engineering, design, product, research, and data. Drove rapid prototyping of ambitious concepts to de-risk bold ideas early and accelerate decision-making.
Led design language refreshes across major surfaces of the Facebook app, driving adoption of the design system and tokenized foundations at scale. Directed exploratory experiments to modernize the experience and evolve the product toward a more cohesive, contemporary design language.
Proposed and drove company-wide initiatives such as Designer Diff Review, enabling designers to formally endorse UI changes directly within pull requests. This bridged the gap between design and engineering and integrated design review directly into the development workflow.
Developed Facebook's standard UI libraries, building the design system from foundational primitives (colors, typography, icons) to higher-level components including the core text infrastructure. Built internal tooling for component discoverability and snapshot testing. Drove dark mode, reactions, RTL support, haptic feedback, text-to-speech, and dynamic type.
Built iOS and macOS applications with a deep understanding of Apple's ecosystem, delivering exceptional user experiences and intuitive interfaces.
As the macOS engineer on Wunderlist, built the entire application from the ground up and contributed to the iOS client. The app won App of the Year and Editor's Choice on the Mac App Store in 2013.
Developed iOS applications for high-profile clients including Hitachi On Business, London City Guide, The Jet Business, Laithwaites Wine, and Liverpool Football Club.
Developed macOS applications to parse and visualize satellite altimetry data through graphs and maps. Participated in software testing for the European Space Agency (ESA) Near Real Time River and Lake processor.
Earth Observation & Water Cycle Science Conference, ESRIN / European Space Agency, Frascati, Italy, 18–20 November 2009. Poster presentation: Lake Volume Change by drainage basin from Satellite Radar Altimetry. (Chamelo, P.; Berry, P.A.M.; Smith, R.G.)