Humberto – SwiftUI, UIKit, Swift

I worked on the Internationalization squad for a major global community platform, building ML-powered translation experiences for over 70 million daily users.

• Led the development of ML-powered translation features that improved cross-language content visibility for 70M+ daily users;
• Designed and shipped multiple A/B experiments on the company’s feed to boost engagement with translated posts;
• Implemented analytics and event tracking to measure user behavior and feature performance at scale;
• Collaborated closely with Machine Learning, Product, and Backend teams to align technical execution with internationalization strategy.

A US-based mobile carrier focused on simple, affordable plans, emphasizing transparent pricing, minimal bureaucracy, and easy-to-use account tools to deliver a straightforward, cost-efficient wireless experience.

• Led feature development and architectural improvements on company's iOS app, used by thousands of mobile subscribers, ensuring scalability and performance across devices and iOS versions;
• Implemented 10+ new features using Swift, UIKit and SwiftUI, enhancing the app’s reliability and UX across core customer journeys such as billing, usage tracking, and support;
• Refactored legacy Objective-C modules into Swift, improving code maintainability and reducing crash rates by 30% in key screens;
• Collaborated cross-functionally with Product, Design, and QA to deliver updates in agile sprints; contributed to backlog grooming, tech planning, and sprint demos.

Personal IOS application that reminds to drink water and stay hydrated all day.

• Designed and built the entire iOS app from scratch using SwiftUI, focusing on clean UI flows and an intuitive hydration experience;
• Implemented local notifications and daily reminders to help users build consistent hydration habits;
• Created a lightweight data layer to track water intake with smooth UI updates and zero performance overhead;
• Optimized the overall user journey, improving retention by simplifying interactions into fast, frictionless steps;
• Published the app to the App Store, handling end-to-end delivery — design, development, QA, analytics, and release management.

A top digital payment platform used by more than 400 million people worldwide.

• Designed and maintained critical iOS modules used by 50M+ users, ensuring high availability and performance;
• Implemented MVVM and SOLID architecture across key flows (authentication, payments), improving modularity and onboarding speed;
• Refactored sensitive financial features with 90%+ XCTest coverage, contributing to a 99% crash-free rate in major releases;
• Collaborated with distributed teams (Backend, QA, Product) to deliver secure, compliant features in bi-weekly sprints;
• Participated in architecture and design reviews, identifying performance bottlenecks and improving app stability.

A flagship mobile learning platform for Brazil’s largest education group, built to deliver a fully online university experience to thousands of students nationwide.

• Led the architecture and end-to-end development of the company's iOS app using Clean Architecture and MVVM;
• Implemented offline-first functionality with Realm, enabling students to study even in low-connectivity regions;
• Improved app responsiveness by 20% through reactive programming with RxSwift;
• Collaborated with Product, Design, and Backend to ship features aligned with OKRs and roadmap goals;
• Optimized CI/CD pipelines with Fastlane and Bitrise, reducing release time and increasing deployment safety.

I worked on the loans team of a major Brazilian digital bank with over 30 million users, improving fast, reliable mobile experiences for submitting and managing credit services.

• Improved loan application flows for a 30M+–user banking app, increasing reliability and performance;
• Refactored legacy modules and enhanced modularization to reduce crash rates and speed up feature development;
• Collaborated with Product, Backend, and QA in agile sprints to deliver compliant, high-impact credit features;
• Mentored junior iOS developers through code reviews and guidance on Swift and app architecture.

An EdTech platform supporting public-school teachers in low-connectivity regions across Brazil, with a mobile app for attendance, class diaries, learning materials, and offline-first data syncing to municipal education systems.

• Architected and built the entire app from scratch using MVVM, Clean Architecture, Realm, and GraphQL;
• Implemented a fully offline-first experience, enabling teachers to use the system in low-connectivity schools;
• Improved performance and scalability as the app expanded to multiple cities and school networks;
• Mentored junior developers through code reviews, pair programming, and architecture discussions;
• Collaborated with Product Managers to transform classroom needs into intuitive mobile features.

A technology studio focused on customer experience, using consumer-behavior insights and digital strategy to create engaging, interactive, cross-platform experiences across both online and offline channels.

• Worked on a variety of projects involving not only iOS development but also IoT integrations;
• Developed an iOS application used to monitor industrial security equipment across factories in São Paulo, integrating real-time data from IoT devices;
• Built an iPad application for a marketing campaign that measured users’ heartbeats, delivering an interactive and reliable experience for event participants.

A developer academy formed through an academic–industry partnership, created to equip students with the skills needed to build high-quality applications for a major mobile ecosystem.

• Developed multiple iOS prototypes using native Apple frameworks (UIKit, AVFoundation, CoreLocation, etc.) with focus on UX, performance, and platform conventions;
• Delivered 5+ complete app projects from ideation to App Store-ready prototypes, applying agile methodologies and user-centered design principles;
• Integrated third-party SDKs (Parse, Facebook SDK, Google Maps) to implement features like social login, maps, chat, and media streaming;
• Collaborated in multidisciplinary teams, enhancing apps through iterative user testing and fast prototyping cycles in Swift.