I have been working with Javascript for over 5 years now and finding bugs is my speciality. I know the technicalties and I'll probably get this done earlier than the date I have set for it.
I may not have used Loopback but I think since I have the knowledge about the nitty gritty details of JS, it wont be a difficult job understanding the library. Also, I have worked on a mongoDB project once, so I do have a basic idea about it.
Do let me know what are your exact requirements, what the code is, whether it is in ES5 or ES6 and do you have a compiler/build system or not.
Thanks,
Mridul.