I applied online. The process took 1 week. I interviewed at HubSpot (Dublin, Dublin) in Jun 2018
Interview
There was an initial phone screen which lasted for about half an hour with an HR who asked me basic questions about my background. She tried to discover if I had FE/BE preferences even though the role was full stack. She was a little vague on compensation but I chose to proceed.
This was followed by a coding challenge that I did on one of the platforms. Lasted for about 2 hours and it was concidered a good signal if you could get it done sooner (a little weird). They just wanted working code, they don't care about polish or quality at this stage. I guess they work in a very iterative fashion.
This was followed by an onsite which consisted of 5 parts. I was required to bring my laptop. During the interviews I would use it to write code, which I thought was pretty good, thought at that stage I was equally comofortable writing solutions on the whiteboard.
First interview consisted of a couple of alrgorithmic questions, see below. They were not very hard.
Second was design review with 2 guys. It was well conducted and interesting.
Third part was with an engineering manager or director for whom I didn't feel that she was listening to me. She had a laptop and I'm pretty sure she wasn't taking notes but sending emails/slack. This felt really bad and I felt I didn't establish any sort of contact.
Last part was about database schema design and querying. See below for details.
All the guys seemed smart, they were asking good questions and I felt the bar was high which is a good thing.
Was rejected with a clumsy and vague email sent from a noreply email address (very poor).I would've thanked them but... noreply email :D.
Rating the process as positive because most people seemed smart and polite, baring select few.
Interview questions [1]
Question 1
Coding challenge was a function that pulls data from a REST API and then uploads to another API. There was some data processing in between that required some matching and intersecting and grouping by.
Write a function that takes a string of characters and an integer n and returns the most frequent n-gram. Example: for ‘abcdabxe’ and 2 returns ‘ab’. If there are more than one with the same frequency, return the first one you encountered.
Modify this to return the most frequent one.
Given an array of integers and a number n, return true/false if there is a pair that sums to that number.
Design question. Design a weather widget that pull data from a meteo service API which makes data available every hour. Then avoid pulling the data from it all the time if there are no changes. Then what happens when you scale this to lots of users.
DB questions. Social network with Person and Friendship and Post and how would you represent this. How would you write a query for the wall? How would you do infinite scrolling? Questions about how indexes work, which index would you create for this or that query etc.
Thanks for the feedback and for taking the time to write up such a thoughtful review of our process, I really appreciate it. Apologies for the email feeling impersonal at the end, but please know I'm personally grateful for your time to share this feedback with our candidates and I hope you'll stay in touch with us. Sincerely, Katie
Neutral experience
Average interview
Application
I applied online. I interviewed at HubSpot (Dublin, Dublin) in Mar 2026
Interview
Smooth interview process , recruitment team is really good , read past glassdoor interview experience to know what to expect . whole process took around a week after the initial screening through codesignal round
Interview questions [1]
Question 1
System Design - Netflix
Coding Round - messaging system with accounts from 1 to N, need to figure out who is a spammer. The spammer messages everyone but does not receive any messages. - Problem statement is clear - but I/O is not given and the interviewer expects the problem to be solved in a particular w
I applied online. The process took 1 week. I interviewed at HubSpot (Saint Louis, MO)
Interview
Single exam no human interaction. The exam was like a college test, something completely unrelated to modern field work. Seemed a bit off base. Definitely didnt seem like a realistic approach to finding real humans to fit for a company.
Interview questions [1]
Question 1
Complete technical exam about solving programming algorithms.
I applied online. I interviewed at HubSpot in Nov 2025
Interview
1. Online assessment on CodeSignal to write a banking system
--> got rejected, but then contacted again to continue the process as they were re-evaluating the codesignal as an indicator.
2. 30 min call with recruiter going over basic information from resume and what the role would be like
3. Three technical interviews back to back - 2 system design and 1 coding
--> got rejected at this stage
Interview questions [3]
Question 1
Design a weather service that updates a widget that is used by a lot of people