java obfuscation

I am looking for an experienced Java programmer to create an application for me that will obfuscate my code. Obfuscation is necessary to protect my intellectual property from being reverse-engineered, and I do not have a specific technique in mind, so I am open to suggestions from a qualified freelancer. The project contains more than 50 classes and methods, so it is quite a big job. Someone with expertise in obfuscation should be able to handle this easily. If you think you can help, please feel free to contact me. Thank you.

The jar file is a runescape bot plugin for the open source third party client Devious. We are going to be selling monthly access to the plugin and need to make sure its not cracked. Right now we have an authentification system already in place and are mainly just looking to obfuscate it. WE were able to obfuscate it a bit with proguard but we werent able to get a result we're happy with. Do you know how long this will take for you so we can have an idea on cost of your services. We are a 2 man dev team releasing a product to a niche and not very profitable market.

https://github.com/melxin/devious-client
this is the client i'm referring too if you are curious


and here are a few examples of plugins for the client, none of which are ours
https://github.com/melxin/devious-plugins-extended