Lucas H. B. Guimaraes

Led mobile team as Tech Lead in Flutter, delivering offline-first apps for agribusiness. Standardized monolithic architecture with Melos and micro frontends, migrated NoSQL database to SQL, wrote clean modular code, BLE device integration, REST API and gRPC implementation, and built NixOS devenv tool cutting onboarding from 2h to 15min. Automated CI/CD pipelines for PRs and store releases, boosting scalability, reliability, and team productivity.

Developed and maintained a Flutter-based purchasing management app, from clean and modular architecture design to deployment. Integrated REST APIs, applied SOLID principles, and implemented state management with MobX and GetIt. Built and managed a reliable SQFLite database, improving stability and scalability. Streamlined purchasing processes and enhanced performance through error monitoring and standardized environments.

Designed and optimized digital health platforms for corporate clients, delivering user-centric web interfaces with NextJS, ReactJS, and TypeScript. Integrated REST APIs, implemented accessibility-focused UIs, and streamlined deployments with Docker, devcontainers, and CI/CD pipelines. Managed AWS and DigitalOcean environments, reducing costs and boosting client satisfaction through scalable infrastructure and proactive monitoring.

Developed and deployed a Flutter mobile app to Google Play and App Store, from prototyping in Figma to release. Applied Clean Code and KISS principles, Agile methodologies, and state management with MobX and Provider. Integrated Firebase Crashlytics, implemented offline-first architecture, and connected to the company’s internal REST API, delivering a stable and maintainable product.

Developed a robust and user-friendly e-commerce mobile app using Flutter, implementing Material Design for iOS and Android. Applied Clean Architecture, MVVM, and SOLID principles with state management via Provider. Integrated Azure and Firebase services, added accessibility features, and structured the project using a Feature First approach. Enhanced usability, maintainability, and scalability through clean code practices and thorough documentation.

Developed administrative systems for a university, automating purchase order processes and reducing manual labor across departments. Built REST APIs for multi-stage order approvals and improved workflows for drivers, supervisors, and the public service department. Delivered scalable web solutions with Angular, Spring Boot, and MySQL, deployed via Google Cloud and Docker. Enhanced efficiency, communication, and service quality through process automation and optimized system design.