Hey,
The flag after your name indicates your from Holland. Just in case you're not, I'll do this in English.
Anyways, I think I can really help you with this. I like to think of myself as a good communicator, and a capable programmer. I'm an artificial intelligence and computer science undergrad(but have been programming much longer than that) with a deep love for Python(ever since I was 12 years old). The "initial milestone" is bullcrap, you can just pay me when it's done(if you do choose me, obviously) and you're happy with it.
I've a lot of experience with Mongo. My latest project was built with MySQL; I'm fluent in SQL as well, but my true love lies with NoSQL.
Hope to hear from you soon,
Elon