Here is the link to a tutorial on socket.io
http://www.devdactic.com/ionic-realtime-socket
This tutorial follows nodejs for back end.
Ok, thanks to all for your valuable support. I’m pretty much close to what I wanted to implement but I need your support once again…
As for now I made my app to send its lat-long every 10 sec to the back end and I receive the same lat-long every 10 sec in my app so I can display the user’s current position but how can I display it on map(as a mark or polylines)??
dude you need to learn about search from Google, any other search engine, someone won’t tell every steps for your app coding.
Thanks for the response. And thank you for letting me know about google too… 
I’ve done my research and I do understand how to work with polylines, as a matter of fact, I’m stuck with “the map not displaying issue” and I do understand it’s more likely because of the Maps API key.
Cheers
Does this works when the app is in background mode
hi good sir. did you made this app working now? this is what i need now. can you help me?
Yes I made it and it works but it was a mess in background. But now from the past couple of years I have switched from ionic.
can we discuss for this …i really need