Fabio
Carnelli

Atomic Build · Remote, Canada

• •Led end-to-end development of the Veza Guardian mobile app using React Native and TypeScript, delivering the MVP in 3 months and enabling real-time school bus tracking for thousands of parents.
• •Optimized performance and stability across production releases, improving crash-free sessions to ~99% and reducing cold start time by ~25%.
• •Delivered a web dashboard using React, Vite, and TypeScript, implementing route optimization, trip tracking, and real-time updates for 200+ active routes.
• •Optimized frontend architecture and component reuse, reducing response time from ~30s to ~8s on a critical request.
• •Delivered quiz, community, and AI-powered learning features, increasing weekly active users by ~30% and improving session retention by ~18%.

High-Growth Silicon Valley Startup

• •Built and shipped production-ready mobile features using React Native, Expo, and TypeScript, supporting frequent releases to iOS and Android via Expo EAS.
• •Led migration of push notification infrastructure from Firebase to OneSignal, enabling rich notifications, segmentation, and Live Activities to drive retention.
• •Implemented analytics and feature flagging with Amplitude, enabling A/B testing and data-driven product decisions.
• •Partnered with product, growth, and design teams to iterate on onboarding, notifications, and engagement-driven user flows.

CombineVB · Remote, Canada

• •Built a personal-development mobile app with adaptive learning paths and habit-tracking features using React, React Native, and GraphQL.
• •Designed habit automation and goal-tracking modules that increased user engagement through smart scheduling and personalized reminders.
• •Implemented product analytics by defining event metrics and building Mixpanel funnels to identify user drop-offs and performance bottlenecks.

Paytime · On-site, Brazil

• •Contributed to a digital banking app supporting PIX transfers, boleto payments, salary management, and financial reporting, servicing over R$15B annually.
• •Built core modules including Sales Simulator, Home, and Manual Sale Entry, and led the redesign of the Account Statement page.
• •Ensured scalable, secure, high-performance features across Android and iOS using React Native and TypeScript.