Oussama Khezour

Senior full-stack developer, through Toptal · Gatorade Gx

• Integrated the Smart Gx Bottle over a custom Bluetooth SDK, with sweat patch scanning for real-time hydration tracking.
• Migrated releases to GitHub Actions: multi-environment pipelines and automated store submissions.
• Made native CI builds 10x faster with a fingerprinted build cache.
• Added support for 10 Latin American countries, switched on per country with feature flags.
• Supported the Xamarin to React Native migration of the SodaStream app.
• Built a full eCommerce demo in two weeks, from sign-in to orders.

React Native, SwiftUI, Kotlin, GraphQL, Fastlane, Bluetooth

React Native engineer · B2B diamond marketplace

• Led the v2 release: a complete redesign with gemstone support.
• Rebuilt the checkout on Stripe, with multiple shipping options.
• Made the iOS app 65% smaller and the Android app 40% smaller.
• Automated releases with CI/CD, cutting manual release work by 60%.
• Built a reusable, type-safe component library, cutting styling code by 40%.
• Active users tripled during my year on the team.

React Native, GraphQL, Swift, Stripe, Push Notifications

Full-stack engineer · Houmti, a social app

• Developed Houmti, a social app for neighborhoods, with chat, polls and location features.
• Moved the backend to AWS Lambda, DynamoDB and API Gateway, cutting operating costs by 40%.
• Engagement rose 30% in six months; daily active users grew 15%.
• Worked with the technical team to cut bug-related delays by 25%.

TypeScript, React Native, Next.js, AWS Lambda, DynamoDB, Node.js

Co-founder, technical

• More soon.