Hi,
I have about 15 years of experience in java , spring , hibernate and a host of other java frameworks. I also have experience in JavaScript and its frameworks like gwt, angular etc.
performance tuning in itself is quite an involved topic and will involve a thorough review of your system architecture along with some of the thresholds that have been set by your architect.
The bid is an indicative bid and it might change depending on the size of your application, target audience and a host of other parameters. If there are some quick wins that you are trying to achieve, I can also help with that.
Do message me so that we can discuss the details further .
Regards,
Rabiya