Database management handling and multiprocessing using python

I am looking for a knowledgeable database expert who can help me optimize my database performance. My database currently runs on Python with csv files in local system platform, and has been giving us some trouble lately while deploying it using sql database.The data fetching and execution is very slow and I will hurt us badly. I need a professional to help pinpoint any issues and solve them efficiently. Experience with Python is highly desirable, as well as having a working knowledge of MySQL, MongoDB, and PostgreSQL. If you have the necessary skill set and are able to take an analytical view of our current system, then I look forward to you bidding on our project. Thanks for considering my project.