Francesco Leonardi
Senior Product Engineer at Attio
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolFrancesco Leonardi is a Senior Product Engineer based in London with 11 years of hands-on experience building performant, accessible, and secure front-end products for clients including Google, Barclays and Adidas. He excels in modern JavaScript ecosystems—React, TypeScript, Redux, Relay/GraphQL—and has a track record of evolving frontend architecture, design systems and developer workflows at scale. At Marshmallow he grew a frontend team, introduced modern testing and deployment practices, and drove adoption of Redux Toolkit, Vite and Playwright; at Nous he led a Relay migration and owned the design system. Comfortable pairing with backend teams, he focuses on efficient data modelling and API design (Prisma/GraphQL) to improve real-world performance and developer experience. Known for mentoring and knowledge-sharing, he regularly runs guilds, AMAs and RFC-driven processes to reduce regressions and improve collaboration. He brings a practical product mindset—shipping MVPs and scalable scaffolds—while maintaining a strong eye for accessibility and cross-browser mobile-first UX.
11 years of coding experience
12 years of employment as a software developer
Bachelor of Applied Science (B.A.Sc.) Computer Science, Bachelor of Applied Science (B.A.Sc.) Computer Science at Università Ca' Foscari VeneziaPerito Industriale Capotecnico Computer Science, Perito Industriale Capotecnico Computer Science at ITIS C. Zuccante
Italian, English
Github Skills (71)
styled-components10
component-library10
react-components10
typescript10
react-component-library10
marshmallow10
react10
cra9
storybook9
react-app-rewired9
craco8
logic7
alias7
java7
react-hook-form7
Programming languages (5)
Github contributions (5)
marshmallow-insurance/smores-react
Dec 2020 - Dec 2022
🍭 Marshmallow React components
Contributions:2 releases, 699 reviews, 187 commits in 2 years
reactstyled-componentsstorybookreact-component-librarydesign-system
fleonard/spaceX
Sep 2020 - Jul 2024
Contributions:10 pushes, 1 branch in 3 years 10 months
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