I applied online. The process took two months.

• First, I took a coding challenge: a small but realistic piece of software with some complexity, but not too hard to create.
• After that, I had one interview via Skype about general topics, but with no technical questions.
• Then they submitted a series of small problems to solve. Half were small coding challenges, something like the ones you can find on HackerRank or similar. The other half were questions about app monetization and marketing.
• After that, I had another Skype interview.
• Next, there was another complex coding challenge, which was a more advanced version of the first.
• After this, I had a two-hour-long interview in person at their office with questions about my goals and some questions about app monetization and data analysis.

In the end, they didn't make me any offer.

Strategies to increase the revenue of an app from $50/day to $100/day.