Hi
My name is Goran, and I own small company in Serbia.
Company is registered for 3 years, and we successfully finished more than 150 websites in that time frame.
Many of them are online shops.
Web shops we made so far are mostly built on Opencart platform.
The reason for that is that it has a wide range of nice design templates, it is responsive, it is SEO ready, naturally multilingual, and the most important, it has very powerful options (complex sipping and tax rules, many different shipping and payments method, customer groups, product options etc.
We used this platform many times, and I can provide links for some shops that we made, over these years. They are all live, functional and working (and for most of our clients they do bring sales and money).
Off course, we need more info about what do you need, but based on example website you provided, priduction steps would include:
1) Install platform Opencart, setup languages and main details about shop, create menu items and pages
2) Apply template we bought and additional plugins if we need them
3) Setup entire functionality (shipping, payment and other rules
4) When everything i fully functional we can make final adjustments to design and make sure it is responsive too.
5) Website testing
6) Publishing website and giving you the instructions so you can update it yourself
Price also includes entry of up to 100 products.
Feel free to contact me with any further questions
Have a nice day