Excellent, but very long interview process.

I was extremely delighted with the interviewers, who were very friendly and approachable.

However, be prepared to be asked questions from a variety of fields, such as:

• Algorithms
• Networking general principles
• Web dev stack
• General questions regarding Java/C++, depending on which language you are more familiar with.

The process included:

• A phone interview
• A video interview (that lasted over 2 hours with 2 coding problems included)
• 2 interviews with 2 teams of engineers from the Barcelona studio (1 was value-based, the other one being technical)
• A final interview with the Director of Engineering.

Find all pairs in an array of integers that sum up to a given number, as optimally as possible.