Optimize my 3gb Mongo db query response times

As an existing business, I'm looking for a Freelancer to optimize my 3gb Mongo db query response times. I already have an existing MongoDB instance running, and I need advice on indexing strategies to improve query performance. The ideal Freelancer should have plenty of experience optimizing MongoDB query response times so that I can maximize the performance of my database. Knowledge of different indexing strategies is also essential. If you feel up to the challenge, I'd love to hear from you.