Dear Madam or Sir,
I am a software developer with 12 years of experience and my core competence is Python.
In the last years I do some system architecture too, so I think I would be a good fit for your project to discuss the concept and the architectural structure of your project you plan to build.
For the technologies: I am familiar with Databases (MongoDB, CouchDB) too, so I have to tell you, that designing a schema in a schema-less database is obsolete. However we can take a look at the objects you want to store into the database, your data-load size and so we can find a database which fits your requirements.
Kind regards,
Gabor Hajba