The biggest cheat code to get better at programming is to do open source, where you have to read other people's code, modify it, and learn to collaborate with people that don't necessarily share your views or priorities.
Hire (and generally fund) open source people.
The biggest cheat code to get better at programming is to read more code.
Many software interviews make you solve brainteasers, but this doesn't generate the correct signal.
The hard part of engineering is being thrown into the ocean of a large codebase and trying not to drown.