We’re looking for a full-stack team or individual developer to build a cross-platform productivity app for Android, iOS, and Web using Flutter (Dart) with a Node.js + MongoDB backend. The app will let users create task boards, set reminders, collaborate with teammates, and sync data seamlessly across devices. Performance, scalability, and clean design are top priorities. Core Requirements Frontend / App Develop responsive UI in Flutter with adaptive layouts for mobile and web Integrate animations and modern UI components (Material 3) Implement secure authentication (email + social login) Offline mode with local caching and sync Backend / Database Build RESTful APIs using Node.js / Express Use MongoDB (Atlas) for data storage and management Implement role-based access control and token-based authentication Real-time data sync via WebSockets (Socket.io or Firebase optional) Admin Panel Web-based dashboard for managing users, tasks, and activity logs API integration for metrics and reporting Deliverables Complete Flutter app (Android + iOS + Web build) Fully functional backend (Node.js + MongoDB) hosted on AWS or Render API documentation (Swagger or Postman collection) Admin panel with analytics and user management Source code in GitHub with setup instructions One deployment and handover session