Your interviewer is a developer from the team you are interviewing with.

Introduction, going through your CV...

About 15-20 open-ended questions for 1.5 hours.

Then you go through the answers with the interviewer, and they add further questions.

Find duplicates in a text block with a WHITELIST and return a dictionary with their appearance count.

Optimize code that is performing updates in a MySQL table.

Design a platform like Instagram with followers and...

hash vs. array stateless vs. stateful HTTP methods: GET, POST, DELETE, PUT

Count the number of users that clicked on your app when you have 10 servers serving that app.

MongoDB, Elasticsearch, CoffeeScript, Redis

Given a list of numbers and a target number, find two numbers in the list that sum up to the target number.

Same question with three numbers.

Count the gender in every tree node that has children.