Oscar Leon
Senior Software Engineer at Summit Digital Group
Barcelona, Catalonia, Spain
Summary
🤩
Rockstar🎓
Top SchoolOscar Leon is a Senior Software Engineer based in Barcelona with five years of experience building large-scale frontend applications, primarily in JavaScript/TypeScript and React. He specializes in fintech and e-commerce integrations, with hands-on expertise with Stripe, PayPal, and Braintree and a track record modernizing high-traffic open-source JavaScript libraries. At PayPal he led major version updates for libraries with millions of weekly downloads and acted as a public-facing maintainer, resolving merchant issues and collaborating with enterprises like Airbnb and Shopify. His background in mathematics and research gives him a data-driven approach to problem solving, from optimization algorithms to improving application security and developer tooling. Bilingual in English and Spanish, he combines cross-cultural communication with technical stewardship and a penchant for reducing manual work through automation. Always open to new connections, he actively engages with the open-source community and seeks opportunities that blend product impact with technical craftsmanship.
5 years of coding experience
2 years of employment as a software developer
High School Diploma, High School Diploma at Inglemoor High SchoolBachelor of Science - BS Mathematics, Bachelor of Science - BS Mathematics at University of Washington Bothell
English, Spanish
Github Skills (36)
paypal10
cross-domain10
validating10
iframe10
braintree10
credit10
popup9
coffeescript9
credit-card9
validation9
ember9
payment9
bank9
react9
angular9
Programming languages (4)
Github contributions (5)
oscarleonnogales/travel-budget
Mar 2021 - Feb 2023
Contributions:117 pushes, 3 branches in 1 year 10 months
oscarleonnogales/capstone-project
Jun 2022 - Feb 2023
Contributions:16 PRs, 35 pushes, 15 branches in 8 months
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