What is your level of expertise working with MongoDB?

I have an intermediate level of proficiency in MongoDB. I am familiar with the basic concepts of NoSQL, can design data schemas considering MongoDB's features, and can create and optimize queries.

I use MongoDB to store documents in BSON format, work with indexes to improve performance. I am also familiar with aggregation operations and can use the PyMongo driver to interact with the database from Python.

Example of a simple query in Python using PyMongo:

from pymongo import MongoClient

client = MongoClient('mongodb://localhost:27017/')
db = client['mydatabase']
collection = db['users']

# Find a user by name
user = collection.find_one({'name': 'Ivan'})
print(user)