I do integration between Brazillian mobile carriers and international Apps (content providers in general) who wants to get into Brazilian market, usually to bill users on their mobile plan instead of paypal or inApp Purchase. The funnil gap is much lower when you Bill users in mobile plan.
Brazilian carrier has a tough and slow integration process and, without a local IT support is almost impossible to connect with them.
As I have everything ready for all major carriers, it's easier/faster/cheaper to hire me instead of build the integration by itself.
First you need to get a job in some telco company and work on related projects. That knowledge is not available on github or books. Actually it is the same with other high-pay integration areas like finances, banking, logistics etc. Once you gain some expertise and see a niche you start freelancing.
Dealing with mobile carriers is really hard - their tech stacks are awful and outdated and they see everything as a threat and try to protect their turf by any means.
Source: I'm trying to launch an MVNO and struggling to find a host MNO/carrier.
This is hands down the best book I read about node. As long as you're already comfortable with JS, this should be more than enough to have you write your own Node apps. Best thing about it: it doesn't limit your to writing node servers like most other intro books. You start seeing node as JS removed away from the browser to a standalone language and not just a way to write javascript web servers.
When I went through it, it was all in es5. So, like I said, if you're comfortable with JS - this shouldn't be a turn-off
I do integration between Brazillian mobile carriers and international Apps (content providers in general) who wants to get into Brazilian market, usually to bill users on their mobile plan instead of paypal or inApp Purchase. The funnil gap is much lower when you Bill users in mobile plan.
Brazilian carrier has a tough and slow integration process and, without a local IT support is almost impossible to connect with them.
As I have everything ready for all major carriers, it's easier/faster/cheaper to hire me instead of build the integration by itself.
www.2brazil.rocks