John Vilela
Full Stack Developer at Freelance
São Paulo, Brazil
Summary
👤
Senior🎓
Top SchoolJohn Vilela is a Full Stack Developer based in São Paulo with over a decade of hands-on experience building high-traffic web and mobile applications using JavaScript/TypeScript. He has driven measurable impact—scaling an app to 10,000 daily users, boosting site traffic by 43% through SEO, and cutting app costs by 82% via architecture and API re-evaluation. Experienced across React Native, Next.js, AngularJS and cloud CI/CD (Azure, Heroku), he combines front-end performance tuning (350ms load optimizations) with backend resilience using Postgres and Firebase. As a freelancer and team engineer, he regularly leads end-to-end projects from prototyping to App Store/Play Store release and staging/production automation. Notably, he has restructured a national sports federation system for speed and security, showing an aptitude for mission-critical, domain-specific platforms.
10 years of coding experience
8 years of employment as a software developer
Certificate in Design Design, Certificate in Design Design at ETEC Prof. Alfredo de Barros SantosHigh School, High School at Monsenhor Cicero de Alvarenga
Portuguese, English
Github Skills (34)
javascript10
ios10
react-native10
expo10
android10
frontend10
react10
push-notifications9
typescript9
react-native-app9
firestore9
mobile9
auth9
firebase9
realtime-database8
Programming languages (4)
Github contributions (5)
cbhg-tech/sigh-front
Aug 2022 - Jun 2026
Contributions:23 PRs, 185 pushes, 20 branches in 3 years 11 months
JohnVidal77/my-franchise-management
Aug 2020 - Jul 2022
Responsive Front-end App for study purposes. Inspired on private project I worked on.
Contributions:2 PRs, 58 pushes, 7 branches in 1 year 11 months
cssfront-end-appfrontendfront-endresponsive
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