we are looking to upgrade our website from Opencart Version 2.1.0.1 to 2.3 or the latest 3.0

Hello we are an eCommerce Store in Pakistan, Specialized in Photography Equipment. we are looking to upgrade our website from Opencart Version 2.1.0.1 to 2.3 or the latest 3.0 is all the extensions and API we are currently using are compatible. We are about 1200 products currently and we plan extand it to 5000 products so develop it keeping mind about that.. and after website done next update it mobile app so please keep that in mind too..We are also looking for a theme changed to a theme which as better mobile time and product filter options (we have not finalized any theme yet we are open for the developer’s suggestions. Please note this is not a one-time project we need a developer who can work with us on regular projects Main Features we have in website that we will like to keep it. • SMS API • Courier Company API • Reward Point System • Payment Gateway from EasyPay. • If customer visit website from mobile or tablet they get notification to download the app • When customer Order a Product and next time when they visit site, popup appears to rate the product • Website blog identical to website.. (will upgrade blog also if you have better layout when our current one.) New Features we are looking for. • Upgrade OpenCart theme • Upgrade open cart version • New added products to home page • Discount and Promotions for app Only • One Click Newsletters (for eg we select products and it will automatically generate news letter from that and send to customers we select but 500 per hour only so that we donot violate any hosting rules.. • Rather then mentioned price on product need a option for Price on Call and price on call products will not add in cart • For new products just mention new Item Coming Soon etc rather then mentioned price • Any new features that developer Thing is best for us. I have Attached APIs so that we can understand Batter