How do I find people other than my EM than will vouch for me during my Meta internship?

I actually talk about this in the course here: https://www.jointaro.com/course/nail-your-return-offer-as-a-meta-software-engineer-intern/part-6-meta-intern-success-series-how-most-interns-fail/

Your intern manager should give you 2-3 names of teammates who are also open to reviewing your diffs. If they don't, you can just go around the team, meet people, and ask the friendliest ones if they would be open to reviewing your diffs.

A tactical angle is to go through the blame of the codebase you're extending and assigning the people you find there as reviewers. This doesn't just apply to interns either - Any engineer should do this if they're lacking reviewers.

Best of luck to your brother! The course should be really helpful to him. You can refer him to Taro Premium using your referral code: https://www.jointaro.com/rewards/

• Do a blame on the file and figure out who touched it recently.
  • You want to find people with context on that file (make sure the diff was not part of a larger refactor)
  • If you haven't worked with the person before, send them a message with context about your project and a link to your diff (I wouldn't just add them raw.)
• Look up people on the team on phabricator (the Meta code review tool) and identify who reviews a lot of code or has a lot of opinions. It's likely they'll give you a good code review.
• Ask in the team chat who would be the best person to review.

Some great answers here as well: Advice for getting faster code reviews?