I have to say, with the best will in the world, I don't believe you.
I don't believe that someone is paying $15000 a week for some basic software development.
After perusing his Twitter I'd say he has escaped basic software development.
If you charge $150/hr and work a 2 week blitz for 100 hours/week.
It's possible.
Factor in the full week, including week end at extra fees, the perks costs, the insurance, the office, the pension. A 5 figure sum seems perfectly reasonable!
However, it's not take-home pay and it's not for basic development.
$1500 per hour? It's looks impossible for a developer, unless he is doing a business.