node server performance issue- only for pro --2

hello there, I need a nodejs expert to work on server issues. 1, its slow 2. memory leak 3. mongodb indexing issue it has to be done today. i am willing to pay $800-900. i will create the milestone , but payment after completing it. note: only pro. dont waste my time. only apply if you can start now and can finish it in 10 hours or so.