Pedro Kirstein

Tech Lead for Curitiba App — the official mobile application of the City of Curitiba — built with Flutter and serving hundreds of thousands of citizens. Designed and owned the system architecture to handle peaks of 200,000+ simultaneous users. Implemented CI/CD pipelines with GitLab and CodeMagic. Built an AI-powered citizen assistant using RAG and Fine-Tuning. Achieved 80%+ test coverage and 99%+ crash-free session rate.

Led the migration of native Android and iOS applications to Flutter, including complete re-engineering of core product features. Integrated automated testing into CI/CD workflows, achieving 80% test coverage on all migrated features.

Built the application from scratch — from architecture design and development to App Store and Google Play publication. Established a data-driven product culture by integrating analytics tools. Ensured high app stability through unit and end-to-end tests and real-time monitoring via Firebase Crashlytics and Remote Config.

Reduced the app crash rate by 20% through systematic refactoring of legacy code. Decreased production error reports by 40% via Firebase Crashlytics. Introduced automated end-to-end tests. Developed NFC contactless payments and Facial Recognition features, enhancing security and payment UX.

Built the application from scratch with a modular architecture, ensuring scalability and agility in shipping new features. Established a testing culture achieving 85%+ code coverage. Delivered key features including geolocation tracking, Google Maps API integration, and Firebase push notifications.

Delivered high-impact features including transaction filters, bank slip reading (barcode), QR code scanning, and push notifications. Reduced app crash rates by identifying and resolving critical production issues. Built unit tests for core business logic. Implemented Facial Recognition and REST APIs.

- Developed and implemented a PWA for iOS and Android platforms using the Angular framework. - Integrated with REST APIs. - Implemented CI/CD using Azure.