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DeliverEat — meal delivery in Dakar

Delivered

Dakar2026

Flutter app (Android, iOS, Linux) to order meals and follow deliveries in Dakar, connected to a REST API and live order tracking.

Context

Ordering a meal means finding a restaurant, building a basket and following the order — even on an unstable connection.

Mission

Build a robust mobile client: no hard-coded business data, secure sessions, live tracking, FR/EN and dark mode.

Role

Design and development of the app

Technologies

Technical implementation

Architecture
Flutter / Dart in layers (UI, providers, services, network); generic typed ViewState; Provider.
Networking
Dio with interceptors: authentication, single-flight token refresh, retries on 429 and network errors.
Real time
WebSocket with back-off reconnection and a regenerated token; automatic fallback to REST polling.
Storage and cache
flutter_secure_storage for tokens, cached_network_image, connectivity_plus for offline mode.
Internationalisation
FR / EN localisation, light and dark themes.

Actions

I structured the app in strict layers: UI, typed-state providers, network services, models.
I handled authentication: tokens in secure storage and transparent refresh, with a lock against double refreshes.
I implemented order tracking over WebSocket, with back-off reconnection and a fallback to REST polling.
I added resilience: retries on transient errors, offline banner, image cache, FR/EN error messages.

Features

Results

Architecture