Messenger

Telegram-style chat: direct and group rooms, reactions, edit, pin and mute, in-chat search with jump-to-message, two-way cursor pagination and optimistic sending.

VoIP audio and video calls

LiveKit calls with ringing, server-synced timers, a floating call layer that survives navigation and push-driven incoming calls. Refactored to SOLID and unit-tested with hand-written fakes.

Realtime layer

One socket service fans events out through a broadcast bus, with exponential-backoff reconnect, reconnect on resume and catch-up sync.

Geofence-driven background tracking

Starts when staff enter a work-site geofence, stops when they leave; survives app kill, offline and reboot.

Native tracking plugin

My own Flutter plugin: Kotlin foreground services, WorkManager and boot receiver on Android; CoreLocation regions, offline queue and BGTaskScheduler on iOS.

Live team map

Real-time staff positions over STOMP with routes, battery markers and off-screen indicators on a custom projection.

Unit area analytics

Units-by-area chart from data model to UI.

Contract flip card

Amount, discount and currency on two sides; fixed mismatches with the web CRM.

Push notifications

Firebase Messaging on iOS and Android.

Config-driven flavors

Gradle generates Android flavors from each brand's JSON; the same JSON drives the Dart config.

One-command builds

Picks a brand, generates icons, swaps iOS identity, builds for both stores.

Native theming from the page

Reads header/footer colors via injected JavaScript and re-themes native bars.