We need an expert dev to develop a chat app very similar to Whatsapp and Telegram, as we already have an Ionic app, we have the backend ready with Websocket, push notification service and rest api.
Resilient in bad internet connections (Retry sending, retry connections, retry rest requests etc)
Work when app is closed and in background
Send/receive audio, document, photo and text
Show message status (pending, sent, received and read)
Current app: [login to view URL]