Simple fixes to newly launched shop

I have basic shop set up and running, but search engine feature is a disaster. In particular; 1. It creates enormously long urls. Instead if creating something like “q=my-product&date=yesterday”, we gets around 200 chars, most of them are redundant. 2. Pagination sometimes does not work. If you go to another subpage, click back or something like that, you may drop your search results. 3. Filtering doesn’t work. You can use some 3rd party software, as well as already done solution, but this needs to be allowed to be used in commercial website. Website is in polish language, so you need to work with google translator a little. PM me a message with a world ‘banana’ and I will give you an URL to the site, so you can view the website and big accordingly. Bids without banana will be skipped. Let me know if you can handle Git. This is rather small work, but if you succeed I will offer you more jobs.