IME, this works pretty well. 1. Step by step instructions to get the development environment setup. If they run into an issue, update the guide. 2. Deep dive

IME, this works pretty well. 1. Step by step instructions to get the development environment setup. If they run into an issue, update the guide. 2. Deep dive into the product, how the business works, where product is going + why, and how their work impacts all that. 3. Set 30/60/90 day goals. 4. Give them tasks (maybe explicitly make some of them pairing tasks if that is part of your eng culture). 5. Regular check ins (this varies based upon their progress and how much they're reaching out for help on their own, but at least weekly). 6. Have them schedule 30 minute informal chats with everyone they'll be working with on a regular basis. The idea behind these steps is to give them the tools, context, and support they'll need to be effective then getting out of the way so learning through doing can start as quickly as possible.