An auction marketplace built for 1,000+ bidders at once: Biddee

Biddee wanted bidding to feel fast, simple and exact: a marketplace where a collector can follow an auction to its last second, built around how Asian bidders buy.

Behind it, the team needed to run the business without spreadsheets: approve sellers and check who they are, release payouts, refund buyers when an item never ships, and act on accounts that break the rules. And the platform had to hold at least 1,000 people bidding at once, around the clock.

We designed the marketplace and the admin site first, then built the platform as one ecosystem: the marketplace for collectors, a Seller Centre for listing and shipping, and an admin site for the Biddee team, kept in sync in real time.

Payments and identity were built in from the start: checkout through GB Prime Pay (mobile banking, cards and QR), sign-up by email, phone OTP or Facebook, and an identity check before anyone can sell. The same team has kept evolving the platform since, adding the top-bidder chart and coupons.

Marketplace, for collectors

• Live auctions with three ways to bid: place a bid, buy it now, or let an automatic bid follow the price for you
• A late bid extends the closing time, so an auction ends when the bidding does, not on a last-second snipe
• Search, categories, and filters by current price, buy-now price, delivery and condition
• Watchlist, My Auctions, and won items with delivery status
• Checkout that shows every cost (item, shipping, auction fee), paid through GB Prime Pay
• Seller ratings and reviews, share links for Facebook, X and LINE, and an email when an auction is about to end
• Thai and English, on phone, tablet and desktop

Seller Centre

• Identity check before selling: ID card, a photo holding it, and a bank book
• Create auctions with photos, delivery details and drafts, and repost unsold items automatically or by hand
• Orders from unpaid to delivered, with tracking numbers
• Earnings with commission and payment fees broken down

Admin site, for the Biddee team

• Seller approvals, with the submitted documents to check
• Payouts to sellers, and refunds to buyers when an item is not sent
• Penalty status for each account, and user and admin management
• Real-time sync with the marketplace, and access rules by role