Glassdoor users rated their interview experience at Customer.io as 100% positive with a difficulty rating score of 2 out of 5 (where 5 is the highest level of difficulty). Candidates interviewing for Senior Frontend Engineer and rated their interviews as the hardest, whereas interviews for Senior Frontend Engineer and roles were rated as the easiest.
The hiring process at Customer.io takes an average of 21 days when considering 1 user submitted interviews across all job titles. Candidates applying for Senior Frontend Engineer had the quickest hiring process (on average 21 days), whereas Senior Frontend Engineer roles had the slowest hiring process (on average 21 days).
I applied online. I interviewed at Customer.io (Chicago, IL) in Apr 2022
Interview
Organized interview process. You get a first get to know me interview, a second one with a technical assessment, and a third one with the hiring manager. They communicate withh you throughout the entire process.
Interview questions [1]
Question 1
Mock call to help figure out the customer journey for different personas.
I applied through other source. I interviewed at Customer.io in May 2026
Interview
I was reached out to by someone in Marketing at this company. She sent me a message on LinkedIn. I gave her all my info and email; she scheduled an interview, and then 2 hours before the interview she cancelled and told me she'd be out of office all next week and would reach out to reschedule. She never did. So I very politely followed up a few times over the last 2 weeks; she never responded—that is, until I let her know that ghosting me when you reached out to me and posting publicly on LinkedIn while ignoring my emails is not only unprofessional but also disrespectful. Then she replied and said, "That's not the experience I want anyone to have, especially in this tough job market." Well, ma'am, that's the experience YOU created. At least now I know what kind of people work at a company I've never even heard of.
The process was quick and strategic. It involved initial screening followed by a comprehensive panel interview with several stakeholders. The team focused heavily on territory expansion strategy, technical ecosystem knowledge, and outbound partner recruitment. The feedback provided was detailed, transparent, and prompt.
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