João Fidélis
Software Engineer II at Amazon
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolJoão Fidélis is a Software Engineer II based in Berlin with 11 years of experience building consumer-facing mobile and backend systems, currently contributing to Amazon’s Customer Reviews backend. He has a strong mobile background—particularly iOS and React Native—having worked on high-traffic apps and contributed to the widely used react-native-camera project by improving image capture, focus handling, and cross-platform build stability. João also brings full‑stack experience from e‑commerce platform work at VTEX and backend services using GraphQL and MongoDB, enabling him to bridge client-facing UI and scalable server logic. Comfortable in Objective‑C, JavaScript and modern web frameworks, he combines hands‑on implementation skills with a history of shipping localized and performance‑sensitive features for millions of users. An often overlooked strength is his early research and tooling work (Automated benchmarking and parallelism testing), which reflects a methodical approach to performance and quality.
10 years of coding experience
5 years of employment as a software developer
Bachelor of Science (B.S.), Engenharia de Computação, 3.3/4, Bachelor of Science (B.S.), Engenharia de Computação, 3.3/4 at Universidade Estadual de CampinasEngenharia de Computação, 3.9/4, Engenharia de Computação, 3.9/4 at University of Notre Dame
English
Github Skills (6)
camera10
objective-c10
ios10
react-native10
avfoundation9
uiimage9
Programming languages (9)
Github contributions (5)
react-native-camera/react-native-camera
Jan 2018 - Oct 2018
A Camera component for React Native. Also supports barcode scanning!
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:140 commits, 171 PRs, 88 pushes in 9 months
Contributions summary:João primarily contributed to the iOS implementation of the React Native Camera component. Their work included adding a feature to mirror images in the `takePicture` function, fixing a focus warning, and integrating preview methods. They also made changes to the Android build process, demonstrating a need to keep both the iOS and Android components working together. They updated picture and recording options and added the ability to play a sound on capture on Android.
reactrncamerareact-nativecameracamera-component
vtex-apps/store-resources
Jan 2019 - May 2020
Common Store Resources
Contributions:158 commits, 86 PRs, 103 pushes in 1 year 3 months
srv-store-frameworkvtex-ioxp-developerstore-framework
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