Opencart developer needed for marketplace site fixes

I have an 80% finished marketplace site based on Opencart with multi merch extension. I am running Journal 3 theme. I need a very experienced and competent opencart developer to help me get it finished. You need to be an opencart extension developer because I have a comission extension we did custom that I need altering and making better (it needs better reporting functionality on comission payouts to affiliates) but the extension works fine, plus some layout bug fixes with journal 3 theme. Things like text boxes too short and so on. The site is functioning correctly, except the custom vendor comission extension needs improving. This is custom work. Please do not take on this project unless you are experienced coding extensions fast in opencart and modifying existing ones if needed. I am runnning Complete SEO extension instead of the builtin multimerch basic function. You will need a lot of opencart experience, proven feedback and be reliable with your work and communications. Oh, and be an efficient fast worker.! There may be other bug fixes needed after the first list is done, but they are minor things like layout bugs really. The main site works as it should. I think this work wont be too challenging for a pro opencart developer. I estimate 10 hours work for bidding purposes, then another milestone can be setup as required. Ongoing work for the right developer on future projects and this site. thanks