One job I picked up was for an IoT Start Up. It was quite interesting work, reporting to the technical director, who was an electronics engineer, who was designing the hardware himself, they had a couple of firmware guys already, and just needed someone to take care of the software.
So they said they needed something in Azure that they could stream their data to and provide analytics for their clients. It had to be Azure, and it had to be Azure Native, and was to be Multi-client, as they had a deal with Microsoft to showcase how well Azure works in the IoT space at an exhibition/conference in 3 months time.
So I worked flat out for 3 months, on a whole variety of technology, from C++ to get the radio packets from their IoT chip, Python to run on the hub to take the data from the C++ and stream it to the cloud, Azure IoT Hubs in every continent to receive the data and store it an a Cosmos DB, and then Power BI analytics wrapped up in an Angular front end that the clients could log into.
Got it finished 2 days before the show, and they were so pleased I got flown business class to Singapore to be on the stand and talk to customers.
The first sign of trouble was when we arrived at the show to find we just had one of those little circular tables with two stools in the middle of the floor, about two feet across and no power.
No problem, I was able to sort that, swapping laptops in and out.
Microsoft were really happy with what we had, and couldn't believe I had thrown it all together in 3 months.
We picked up a potential customer for the system, a major Asian Telecoms company.
Then when we got home, the CEO swooped in. I had never met this guy before. Imagine one of the VC guys from Silicon Valley, or the CEO from the IT Crowd. You get the picture. Could talk the hind leg of a donkey, and real street smart, but no brains. He insisted on "taking it from here" and flew alone to strike the deal with the customer. Came back with an MOU in his pocket and said to me, their guys will be in touch with you.
Then I got a call. Can you send us the source code and tell us how what servers we have to run this on?
Um, its cloud native.
No, we can't use a cloud it has to be on our servers - your CEO told us that was no problem..
He hadn't even taken the trouble to find out what it was we had built, and what he was selling.

Startuppers, hold in there. We are going to fall one by one but remember our field is strong and full of opportunities.

The first domino has fallen at my place and it was the hardest thing I ever had to do.