I applied online. The process took 2 weeks. I interviewed at ClimatePartner (Munich, Bavaria) in May 2022
Interview
1. 1/2 hr HR chitchat with a very nice lady
2. 1 hr Live code challenge on repl.it with 2 senior engineers. A video call over Ms Teams, and also you're all on the same repl.it environment. You have to solve partially a sort of algorithms test in a language of your choice (I took Java). They did explain these terms beforehand, and also provided a very similar practice problem, so you do have some time to practice and review some subjects. Also, you are allowed to use google or whatever you need to look up syntax or anything. They look at your way of thinking and reasoning, and I think they are more interested in a flowchart or pseudocode than an actual piece of working code.
Interview questions [1]
Question 1
Write a program to organize and produce a schedule of talks of different lengths for a conference. You are given a list of talk titles and length, and a corner case of a talk type "lightning" that lasts 5 min. Each day has two sessions of about 4 hours, so your program must find the best fit.
You are not supposed to finish a program, just give a very good approach, perhaps a class diagram, flowchart, pseudocode and maybe solve a key part of the problem in real code.