Timed Auction Website Development -- 2

I need a website that supports timed auctions, fixed priced sales and with an easy workflow to upload new items weekly and attach multiple images per lot.

Key features needed include:
- Timed auctions with countdown, reserve prices, bid increments, watchlist & anti-sniping.
- Simple lot creation (title, description, category, starting price, reserve, images/video).
- Bulk upload (CSV/Excel) + drag-and-drop media.
- Bidder registration & approval, outbid/winner notifications (email/SMS).
- Invoices and checkout for winning bidders; payment gateways you prefer.
- Mobile-friendly design and an admin dashboard for auctions, lots, users, and reports.

Similar functionality to www.bidspotter.com/en-us

Preferred payment gateway: bank transfer , Draft bank cheques
Notification preferences: Both email and SMS
Auction item category: Equipment

Ideal skills and experience:
- Web development ( with demonstrable auction site experience)
- Familiarity with payment gateways, especially those listed above
- Strong UI/UX design for mobile responsiveness
- Backend development for admin dashboards and bulk uploads
- Experience with notification systems (email/SMS)

Preference given to developers based in Canada / USA