GPS tracking complete software, based on server client architecture. GPS/4G devices connects to server by TCP IP socket connection, and also PWA app connect to same server. PWA will be based on different privileges access depend if administrator, call center operator or the final customer accessing the app. Google maps and open street maps should be implemented.
Experience in similar project developed previously is a must.
32 freelancers are bidding on average $1301 for this job
I think more discussion is required to understand your full requirements and how to complete them step by step. If you are interested, send me a message and then we can discuss more about your project.