Kotlin - Blockchain CODE fixing

I'm looking for experienced freelancers who can help me with bug fixing my Kotlin code which is related to blockchain development. I need someone who can diagnose issues and get the system to functioning correctly. Testing should also be done to make sure the system is working properly. In addition to correctly functioning system, I would also like a written report on the issue(s) as well as highlighting proposed solutions for future reference. Thanks in advance for your assistance.