I messaged the recruiter, Amery, on LinkedIn and received a response immediately. A phone interview was set up promptly, and we discussed iOS/Objective-C topics. Everything went well, and I was invited on-site.

My on-site interview was great. I spoke with two employees who would be potential team members, and the VP of Engineering. All were very friendly, and I had a great time.

A piece of advice for AppLovin: Don't be afraid to go a bit off-script during interviews to get to know your candidates and let them get to know their future co-workers. This is an advantage in the interview process that you have over larger tech companies, and I imagine candidates would find great value in familiarizing themselves more with who they will be working with.

Other advice: Potentially review the processes by which resumes are reviewed. I applied and was given a rejection email (which I didn't see until much later), but when I messaged the recruiter directly, she said I was a great fit and initiated the interview process.

Data structures, algorithms, sorting, complex Objective-C topics, live paired programming in Xcode.