An auction house's process has a lot of moving parts: items need to be submitted and catalogued, bid on, sold, and paid out — and beforehand, this ran across separate tools and paperwork instead of one system.
The house runs three kinds of auctions — online, in-room, and hybrid — and in a hybrid auction, bidders in the room and bidders online need to compete on exactly the same terms, in real time, with neither side at a disadvantage.
Bidding also had to be fully usable on mobile, for two different audiences: buyers tracking and bidding on lots from their phone, and staff photographing and logging submitted jewelry from theirs — plus contracts, receipts, invoicing and payment needed to happen without manual paperwork piling up after every auction, in a three-language (Hungarian, English, German) interface for an international buyer base.