Carlos Abreu

Key member of the frontend team for the SilentCare platform, an industrial IoT ecosystem for real-time machine monitoring and downtime prevention, deployed across Web and Mobile. • Web Platform (React 19 · TypeScript · TanStack Router · Material UI (MUI v5) · Highcharts) - Built and maintained reactive dashboards for live IoT sensor telemetry using React 19, TypeScript 5.8, and Highcharts, ensuring zero-latency data visualization for industrial operators. - Developed a drag-and-drop UI modeler (Digital Twins) using dnd-kit, enabling clients to visually configure machine layouts without code. - Architected PWA layer with Workbox and Service Workers for offline resilience in industrial environments. - Managed frontend state and routing with TanStack Router; styled components with Material UI (MUI v5), Emotion, and Framer Motion. - Integrated Firebase (Auth, Firestore, Storage) and Axios for backend communication. - Implemented i18next/react-i18next for multi-language support and automatic unit conversions across global markets. - Monitored performance and errors with Sentry and LogRocket. - Tooling: Rsbuild · Rspack · Bun · ESLint · Prettier · Babel • Mobile Platform (React Native 0.81 · Expo SDK 54 · TypeScript · EAS Build) - Developed cross-platform mobile app (iOS & Android) with React Native, Expo SDK 54, and TypeScript using EAS Build for CI/CD deployment. - Built high-performance data visualizations with D3.js 7 and React Native Skia (@shopify/react-native-skia) for real-time sensor graphs. - Implemented animations with React Native Reanimated and Styled Components 6 for fluid operator UX. - Integrated Firebase Authentication and Realtime Database via @react-native-firebase. - Managed forms and validation with Formik + Yup; navigation with Expo Router. - Configured Expo Notifications, React Native Maps, and background data sync with AsyncStorage.

• Server administration: Configuration, monitoring and maintenance. • Web development and maintenance: Ensuring the performance and security of applications. • Plugin development: Creation and optimization of custom functionalities. • Design collaboration: Joint work with design teams for fluid integration.

Developed and maintained a production-grade cross-platform mobile application (iOS · Android · Web) for a B2B vendor management platform, using a modern React Native stack with offline-first architecture. Mobile Development (React Native 0.81 · Expo 54 · TypeScript 5.9 · EAS Build) - Built cross-platform app with React Native, Expo SDK 54, TypeScript 5.9 (strict mode), and React Native Web for unified iOS, Android, and Web support from a single codebase. - Architected offline-first data synchronization using PowerSync and SQLite (react-native-quick-sqlite), ensuring full app functionality without network connectivity. - Implemented Firebase Auth with REST API token management and automatic refresh token rotation, secured with Expo Secure Store (AES-256 encryption). UI & Performance (Tamagui · React Native Reanimated · Shopify FlashList) - Built design system with Tamagui for consistent cross-platform UI components, replacing native StyleSheet for performance-optimized rendering. - Achieved smooth 60fps animations using React Native Reanimated; optimized large lists with Shopify FlashList. State & Data Fetching (Zustand · TanStack React Query · Axios) - Managed client-side global state with Zustand and server-state caching with TanStack React Query (stale-while-revalidate strategy). - Configured Axios HTTP client with request/response interceptors for automatic token refresh and error handling. Navigation & Forms (Expo Router · React Navigation · React Hook Form · Zod) - Implemented file-based routing with Expo Router; configured Bottom Tabs and Stack navigators via React Navigation. - Handled form logic and schema validation with React Hook Form + Zod (TypeScript-native validation). Tooling: ESLint · Babel (babel-preset-expo + Tamagui plugin) · Metro Bundler · EAS Build/Deploy

• Microfrontend development with React and Single SPA. • Development of mobile applications and business modules with React Native and React. Using libraries such as: Redux, React Query, Axios, Biometric, Maps, Face Detector, Animated. Manipulating states to store videos and photos. • Implementation of clean code and testing to reduce code smells and improve coverage metrics in SonarCloud.

Admin panel development using the Design System Material IU and Style Component, graphics with Chart.js. And handling HTTP client with React Query and Axios.

Development of projects in Angular 6 / 7

Developer of the hybrid mobile application with the framework Ionic / Cordova and AngularJS. Developer front-end and back-end under the language Php, html5, css3, Javascript and Bootstrap library. For handling Mysql data. MVC pattern.