[m11a]

More jobs? No. But 'more' doesn't really matter. It's hard enough to move to the US.

It's easier for him to find a tech job in the UK (there are plenty) than it is to move to the US and get a tech job (for which he'd need to get sponsored by a company).

The biggest difference between US and UK tech isn't job 'quantity', it's job 'quality' (the culture in the US is better imo). But I'm not sure that's OP's priority currently.