Hello Friend,
My name is Rohit and i have 4 year experiece of PHP. I always prefer to use Ajax as loading complete page again and again, slow down the preformance of website. It is also not good for UX. I prefer to use ajax for complete listing, Add, Delete and Update action.
I am familiar with barcode generator and generally use picqer library as it provide very good options. It provide almost 25+ accepting type of bar code generation which will suit with most of mobile App.
You can just drop a message to me with your requirement and i can prepare a demo for you. On the bases of that, you can further decide to award this job to us.
Thanks and looking for a ping :)