[MartinCron]

My advice would be the flip side of the advice that I give to people who downplay their skills, which is "focus on telling concrete meaningful stories".

So, you could, when interviewing, focus on bringing out discrete meaningful stories. Ask for those kinds of examples. Ask what they're proud of. Create a space in which they feel comfortable saying positive things about themselves. Maybe lead by example by talking about part of the organization that you think is awesome.

Instead of asking "what are you good at?" you could ask for things like "what do you most love doing?" Also, asking for numeric ranking "1-5" of technical skills might be a little too aggro/macho.

Don't downplay the plural "we built this" as less important as the singular "I built this" Some people are just better at sharing the credit than others. If in doubt, ask for clarity.