I applied through a recruiter. The process took 4 weeks. I interviewed at Callstack (Warsaw, Masovia) in Sep 2024
Interview
1st call HR and than codility and than technical interview.
codility was pretty hard for 3 hours. technical was quite ok pretty good questions and very practical process. id say that its pretty long but average in big companies process.
I applied through a recruiter. The process took 1+ week. I interviewed at Callstack in Feb 2025
Interview
The interview process has 3 steps:
- HR interview
- Recruitment task
- Developer interview.
O only made it to to the second part of the process.
The interview either the HR was very good. Very professional, and also friendly.
For the recruitment task o had a week to complete. It was on a platform named codility, and it had 5 sections. A react section, a react native section, an algorithm section and 2 multiple choice sections (one react native and one basic programming tools and such)
Interview questions [1]
Question 1
I had to create two react and react native components. One list with buttons that triggered showing the section items and one login page in react native.
