Search software developer for online auction platform

I would like to start a structured bidding process as real estate agent. This is how the online bidding process works: the steps in detail Subsequent to the viewing appointments, all prospective buyers receive their own access data to a secure area on Maklaro, in which the date for the online bidding process as well as all details of the property can be viewed. An online bidding process usually takes place two weeks after the last viewing on a Sunday. If the deadline for a bidding process, Maklaro informs the owner personally about the appointment, which is also visible in the personal cockpit as a step of marketing. The bidding process usually takes place on a Sunday afternoon and lasts half an hour. During this period, the prospective buyers can submit bids and adapt them at any time to the anonymized bids of other interested parties. Should a bidder submit an offer two minutes before the end of the bidding round, the round will be extended by another two minutes. The owner can follow the bidding process live via his personal cockpit. Once the last bid has been made, the results will be sent to the owner by mail. This now has 2 working days to decide for a prospective buyer or against a sale. If a buyer is found, Maklaro assigns a notary with the creation of a purchase contract. Both buyers and sellers receive this in advance for review and can always contact any questions or comments to their regular contact at Maklaro. Once all questions have been clarified and both parties have approved the purchase agreement, nothing stands in the way of signing the contract - your property is sold! Can you help with that? I ask for a short statement including programming costs and expected completion. Thank you very much and greetings