Hi there,
I'm a professional mongoDB and Cassandra DB Administrator. Though the project description is very limited, i could able to understand what you are looking for. I did managed more than 50 mongoDB clusters in real time. Deployed, configured, maintained and resolved all most all kinds to issues in MongoDB.
The only reason i'm bidding low is because i'm new to Freelancer.com. Let me know if you are interested to offer me your project. Hope i will hear back from you, Thanks