Personal details
Fillipe O.
About
I’m a Software Engineer focused on Front-end and mobile development, with strong experience in React, React Native, JavaScript, and TypeScript, building scalable applications with a clear focus on user experience and business impact.
Throughout my career, I’ve worked across different industries — including telecom, digital health, and retail — collaborating with cross-functional teams in fast-paced, high-demand environments.
I have hands-on experience developing and evolving production applications, including:
- Building features focused on user acquisition and retention
- Improving performance and application stability
- Implementing analytics and event tracking (Firebase)
- Applying accessibility (a11y) best practices
- Enhancing code quality and test coverage
I’ve also been involved in large-scale app migrations, ensuring a smooth user experience while modernizing the technical foundation of the product.
More recently, I developed a technical solution focused on retention that resulted in a 25% reduction in user drop-off, reinforcing my focus on delivering real business impact beyond just implementation.
I also have experience with the full mobile lifecycle, including publishing apps to the App Store and Google Play, and some backend knowledge with Node.js, which helps me better understand integrations and system design.
Today, I’m looking for opportunities as a Front-end Engineer, where I can contribute to scalable solutions, collaborate on technical decisions, and continue growing in challenging environments.
Work Experience
- Worked as a contractor React Native developer at Nio Internet (former Oi Fibra), a fast-growing Brazilian telecom company focused on high-performance broadband services
- Contributed to the migration of the legacy Oi Fibra app to the new Nio Internet platform, ensuring seamless user experience transition
- Developed new mobile features focused on customer acquisition and retention
- Fixed bugs and improved app performance and stability
- Implemented analytics and tracking events to support data-driven decisions
- Improved accessibility (a11y) across acquisition and retention flows
- Collaborated closely with product and business teams
- Designed and implemented a technical solution for retention, reducing user drop-off by 25%
Working as a contractor with Lojas Renner SA, a major fashion retail company in Brazil. Their goal is to increase their Market in South America
I joined the tech team as a Software Engineer, together we've built the new React Native app for Uruguay. It will be soon released in Brazil.
- Implemented universal links to open the app given the the corret URL
- Developed the wishlist page, checkout page and optimized several other pages.
- Implemented numerous test improvements, increasing the test coverage with Sonar.
- Optimized accessibility for the Home page and the Products page.
- Implemented numerous events used with Firebase event manager.