I applied online. The process took 5 weeks. I interviewed at Yoyo Labs (Berlin) in Dec 2021
Interview
I had 3 interviews with them and got rejected in the end. The motivation was a lack own knowledge of some specific technologies like Spark and Kubernetes than the problem solving skills. I was very happy since the beginning of the hiring process because after my application they answered super quickly the same day, and in general every step was very well organize. Yoyo Labs is a small company with very smart people inside. I had first a 45 minute call with the Director of Engineering to get to know my background. Then two interviews of 1hr each with the founders where they asked me technical questions that were not banal and quite challenging, but the idea was more saying how i reason. In the end i was quite annoyed because they rejected me for some technologies i could have learned by myself, and they could have realized this earlier. They are a small company for now so they can't have the risk of hiring somebody that is not creating value since the beginning, i understand this.
Interview questions [1]
Question 1
First 1hr interview:
1- Most efficient way to find loops in a linked list
2- How you implement a URL shortener service, which function you would use, how you would save the data and how you would handle high traffic issues
3- How would you implement an app that handles the accounting for the expense for a group of people? Both with splitting equally the expense and both by specifying each one amount.
Second 1 hr interview:
4- How you would you design a system for weather alert with a network of sensors spread in the country. Where would you save the data and how you would scale and manage high traffic.
