According to the Hive website, in June 2019, Kassandra Pop (now renamed Raluca on the about page) picked up Swift in her dorm. In October 2019, she put Hive onto the Apple Store. I'm not a specialist, but it sounds very fast to me, not so much because of the programming but because of all the infrastructure a network like that requires. Besides, getting the app approved by iOS takes like 1 month in itself.
Any specialists wanting to chime in, please do.

Anyway, Kassandra Pop, according to her LinkedIn, was just out of a year and a half working full-time in accounting and was carrying on with a psychology BA at the California University, when she got started on code—so no prior experience there. A bit of a wonder child if true. Again, not impossible, but would love to see some interviews/investigations on that period of time.

She was then joined in 2020 by an unnamed UX designer. An online search reveals that designer to be someone named Gilberto Malfabon. He's described as a co-founder of the company on apollo.io, but according to his LinkedIn, he's also been employed full-time elsewhere since 2021, so I'm kinda curious: is he still with Hive? And regardless, why not associate himself with it openly? Idk.

We don't know who the full-stack dev who joined in May 2021 is. Inquiring minds do want to know. Again, bear in mind I'm asking because there is a $300k and counting campaign on WeFunder that contains zero info about the company. Also, this is a place that asks us to trust them with our private info and thoughts. Who they are is relevant.