I need to update my OpenCart Version 1.5.2 to the latest version 1.5.4, and i am also using shoppica 2 theme, and i have also installed a mobile framework, and some modules which should be cared about by the programmer. I need it to be upgraded without any bugs showing after the completion with proper backup if something goes wrong. My website is live so i need a specific date of completion and time.
I need a professional in OpenCart to have this job easy to him, and i don't need someone with little experience to do this project and later on not able to fulfill my requirements.
Before starting we will agree on all steps .