Anas Abu Shanab

Flutter Developer

Freelance • Freiberufler

Apr 2024 - Present • 2 yrs 4 mos

• Designed, built and released cross-platform Flutter applications for Android and iOS as sole mobile developer, owning the product from requirement gathering through store launch and post-release support. • Shipped two production applications currently live on both the App Store and Google Play (Dietition – diet and nutrition commerce app, Mauzon – commerce platform), handling signing, store listings, review feedback and version updates. • Integrated REST APIs using Dio/HTTP clients with token-based authentication, interceptors, centralized error handling and offline caching, keeping the app stable under weak network conditions. • Implemented authentication and authorization flows with session/token refresh, role-based screen and data access, and secure local storage of user credentials and personal data. • Applied Clean Architecture with a modular, layered structure and state management (Bloc, Riverpod, Provider) to keep large feature sets maintainable and testable over long client engagements. • Integrated Firebase (Authentication, Firestore, Cloud Messaging) and OneSignal to deliver push notifications and real-time updates to specific users based on their account and role. • Implemented complex multi-step business workflows and long validated forms (orders, subscriptions, user profiles) with client-side validation and clear error states. • Diagnosed and resolved production issues using Flutter DevTools, logs and crash reports; optimized rebuild cycles, list rendering and API payload handling to improve app responsiveness. • Worked directly with clients and backend engineers to define API contracts, advise on technical trade-offs, and deliver agreed scope on schedule.