A services marketplace runs on conversation, and conversation stops when the buyer closes the laptop. Chat, order completion and web-login approval moved onto the phone in one Flutter codebase.
Start your projectThe build
Legiit Messenger is the mobile companion app for the Legiit services marketplace, built by Aipxperts in Flutter for iOS and Android.
It puts buyer and seller communication and the order workflow on the phone: real-time chat, order management with reviews, push notifications, and a multi-device account security layer including web sign-in approval and two-factor authentication.
The problem
A services marketplace runs on conversation. A buyer asks a question, a seller answers, the order progresses. Every hour between those steps is an hour the deal can cool, and marketplace transactions compete with the buyer simply changing their mind. The desktop-only constraint created three specific problems:
Sellers were tied to a machine to answer, so evening and weekend enquiries waited.
Order actions lived away from the conversation, so completing or reviewing an order meant leaving the thread it was discussed in.
Users log in from several devices, and there was no way to see or control that from a phone.
There was also an operational piece running underneath: the app had to migrate to the platform's v4 API while maintaining a steady release cadence to both stores.
What we built
We built the app around the chat thread rather than around a navigation menu.
Pusher Channels with quick-reply templates, file and image attachments, an emoji picker, a multiline composer, copy-message, read receipts, and block or report-as-spam.
Infinite-scroll pagination with shimmer loading states.
Order list plus in-thread order details, complete-order and complete-with-review flows, and seller ratings.
Per-category toggles separating order notifications from chat, with delete.
Registration, email and password login, phone verification with country codes, OTP, two-factor authentication and password reset.
A web login can be approved or blocked from the phone with a "Yes, it's me" or "No, block access" prompt.
Every signed-in device visible, with multi-device force-logout and account deletion.
System-following dark and light theming, connectivity handling and a force-update dialog.
The outcome
Delivery scale from the project itself: roughly 149 Dart files and 24,000 lines across 483 commits since September 2023, shipped through Android 1.41 and iOS 3.0.4, with the whole application migrated to the platform's v4 API mid-life without interrupting the release cadence.
Flutter
Dart
Firebase Cloud Messaging
Bitbucket PipelinesIf your marketplace conversations only happen at a desk, you are losing the deals that come alive in the evening.
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