I've also have to work with a guy like that.

It could be okay if it wasn't for the fact that they have a high esteem of themselves and don't learn shit.

The first POC they vibecoded and managed to sell was a pile of trash that we couldn't realistically deploy as it.

So we spent two weeks to make it something decent enough to have the minimum confidence of the thing being reliable and safe enough to reach staging. Two weeks during they told us daily how we were slowing everything down.

After that we spent an hour explaining them how making something works on their computer, without tests, without thinking about edge cases... was not the same thing as deploying it and releasing it to actual users.

We agreed on, next time, asking us for an estimate on how much it would take to move the POC to something that could be released, before signing on any engagement with a customer.

Well, last week they came with a new deal they just signed on a completely new POC. Customer was expecting it for yesterday. To make it work, we have to setup a VPN between our infra and customer infra. Their internal process make it impossible to have this under a month.

Now, my guy and the customer, are mad at me because I can't deliver.

And the first POC? Customer wants new features. My guy don't want to deal with it because it's not their job.