Senior Developer applicants have rated the interview process at Lab49 with 2.8 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 32% positive. To compare, the company-average is 47.5% positive. This is according to Glassdoor user ratings.
Candidates applying for Senior Developer roles take an average of 21 days to get hired, when considering 19 user submitted interviews for this role. To compare, the hiring process at Lab49 overall takes an average of 23 days.
Common stages of the interview process at Lab49 as a Senior Developer according to 19 Glassdoor interviews include:
Phone interview: 41%
One on one interview: 22%
Skills test: 17%
Group panel interview: 7%
Presentation: 4%
Background check: 4%
Personality test: 2%
Other: 2%
Here are the most commonly searched roles for interview reports -
I applied through a recruiter. The process took 3 weeks. I interviewed at Lab49 in May 2012
Interview
I was contacted by Lab49 recruiter. After some basic information exchange, phone call ended with a 5-minute technical screen. I got most if not all answers right. This was followed with a longer phone screen that was all-technical. I did quite well. This was followed with an at-home coding challenge. The problem was a reduced version of actual work I had done in real-life projects. I provided not just the basic solution but several iterations including test results, proof and simulation of program running thread-safe in concurrent mode. After waiting a couple of days I asked for feedback on the assignment but received none. This was followed with an in-person interview which was another programming challenge. There was an interviewer present and I was supposed to discuss my approach and solve the problem in an hour. Although I would have solved it faster & better if I were just left alone, I did finish the problem correctly in about 50 minutes. However, I was told that they would not proceed further based on interviewer's feedback, which was a surprise. I asked to receive feedback but again got no feedback. The problems were organized well and that's something that I liked. I wasn't thrilled with the office which had no air-conditioning except for the interview room and make-shift furniture everywhere. What I didn't appreciate the most was not receiving any feedback despite asking on two separate occassions. Neither of the two programming problems were difficult nor were the phone screens.
Interview questions [1]
Question 1
Can you write an anonymous inner class that extends the class in which it is being declared?
I applied through a recruiter. I interviewed at Lab49 (Budapest) in Nov 2025
Interview
First Round: regular HR round talking about the company, and relevant previous experiences
Second Round: 90 minutes live coding. Allowed to read docs or ask questions, but can't use AI or google the solution.
Difficulty is a bit hard to judge, because the problems were the type where knowledge of specific patterns is required, and that determines whether it's hard or trivial.
Style of coding and a compact and "elegant" solution were emphasized over relevant skills, or thought process.
There was no followup or any feedback after the second round.
Interview questions [1]
Question 1
Make concurrent calls to a paginated API and concat the results in order. Display the results, then write various algorithms working with the above data.
I applied online. I interviewed at Lab49 (Budapest)
Interview
They said the interview process will take 4 rounds. Two technical coding interviews and two talking interviews. The first interview was about clean coding. The task was finding a bug in the code. Then refactor it how I want it.
Interview questions [1]
Question 1
Fix the bug. Then refactor the code how you want it.
I had 2 HR screenings then a hackerrank technical interview in which after solving one exercise the interviewer wanted me to solve another one and even though the interview was supposed to last 90 minutes he cut it short at 60 and that was it. I was not able to finish the second exercise. So what do they want?