I applied through a recruiter. I interviewed at NNG
Interview
I took part only on the first interview, at an HR office. There were 4 problems which I had to solve on paper in 60 minutes. The first one was a "what is the output" like question, the second one was a basic what does the code and how could be rewritten to work faster. THe last two were easy problem solving, like find the deepest element in a binary search tree.
I applied online. The process took 6 days. I interviewed at NNG
Interview
Tooks some days, make an test online then one test at them. All about was algorithms.
You got a codility test at first, then you go in the office, you got a laptop with visual studio and a task, and a face to face interview with leads
I applied online. The process took 3 weeks. I interviewed at NNG (Budapest)
Interview
The process consists of multiple rounds. The first round was a test with four small questions. One was to write a code snippet related to a binary tree, there was a 'what is the output and why' type of question mixed with bugfixing, another question was about sorting algorithms, and there was another code snippet writing in the topic of number systems.
The second round was an in-place interview with team leaders, the main topic was about the first round's test.