One initial meet-the-team over video, one take home test (React/Typescript front end test - quite real-world), one fairly pleasant and collegial on-site meet-the-team at their office. Founders are young technically brilliant but professionally green recent uni grads. Product is cutting-edge and truly innovative. 3 days onsite was a hard requirement, regardless of individual circumstances. The offer was withdrawn when I asked for the opportunity to revisit the onsite arrangement after building up some goodwill and a track record of delivery (while accepting the onsite arrangement to start). There was no negotiation, just a panic reaction. It's quite a red flag for any potential employee and suggests a lack of maturity - if they "spit the dummy" about this, they'll probably do so in other situations. Overall a disappointing outcome, but I'm glad I didn't go further.