Hello,
I'd be happy to do this for you. I've been working in software development for decades. Most of that time was also dealing with database concurrency issues, which is what you seem to be having. I've fluent in all the technologies you've got listed, too.
I'm trying to find more clients such as yourself, who are overseas. (I'm located in the Chicago (U.S.A. area myself.
Thank you for taking the time to consider me. And I hope to be hearing from you.
Jim (Fourth Ring Consulting)