Need small amendements in Codignator ERP in different phases

I am looking for a developer who can make small amendments to my Codignator ERP during the coding phase. The specific amendments required are bug fixes. I have a detailed list of changes that need to be made, so the developer will have clear guidance. The ideal candidate for this project should have experience in Codignator ERP development and be proficient in bug fixing.
No upfront ,however 3-4 milestones would be there and each one would be released after testing of project.