Duo Security Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 147 interview experiences · FREE TO READ
Which role are you interviewing for?
30 roles · 147 reportsCandidate interview experiences
First-hand accounts from people who interviewed at Duo Security.
Duo Security
Technical Support Team Leader
Lead Average Neutral experience Accept offer 5 rounds
Interview process
Recruiter call Phone screen Onsite Take home Offer
Interview formats
Behavioral Technical
Had a 30 min recruiter call, then a 45 minute hiring manager video call. After that, there were three 45 minute interviews with my in-role peers. Then I waited a long time, over a month, and almost gave up hope. They then asked me to do another peer review, and I got an offer a couple weeks after that.
Confirmed questions3 questions
- Can you describe the best day you experienced in your previous position?
- Could you share what the worst day in your last role was like?
- Tell me about an instance where you assisted a colleague who was facing difficulties.
Duo Security
Site Reliability Engineer
Mid Average Positive experience No offer 4 rounds
Interview process
Technical screen Technical screen Presentation Background check
Interview formats
Coding System Design Behavioral
I interviewed for an SRE role at Duo Security in Sydney. They're still building their Australian team, with just a few people there now. The SRE manager and the person I spoke with for the phone screen and first interview were super nice. The interview had 4 parts: a coding test on Codility (like LeetCode), a system design interview, and two behavioral chats with management. I didn't do well on the coding test, as that style of interview isn't really my thing. Honestly, I was a bit surprised they had a coding round for an SRE job, but I guess companies define these roles differently.
Confirmed questions2 questions
- Could you code a function to reverse a list?
- Can you write a function that validates bracket sequences?
Duo Security
Software Engineer
Senior Easy Negative experience No offer 5 rounds
Interview process
Recruiter call Technical screen Technical screen Technical screen Technical screen Technical screen
Interview formats
Coding System Design Behavioral
Recruiter was amazing in coordination and keeping me in the loop. They were transparent and provided whatever "excuse" the HM has given them. I had 5 rounds - 1 code review, 1 coding and 1 design, 1 behavioral with engineering leadership and another with Product Manager and Designer followed by 30 minutes of HM wrap up. All the rounds had behavioral question follow ups to my tech answers and everyone pretends to be culturally collaborative. Overall, I did well and HM said great things in the wrap up round. The next day was the day of results and they decided to pass saying that I take initiatives to improve quality which can disrupt their cultural ethos. How on earth can someone provide this lame feedback. Anyways, I moved on and decided not to interview anywhere which had "woke" red flags of fake culture fit
Confirmed questions8 questions
- What is your approach to the Game of Life problem with Matrix manipulation?
- Can you describe your design for an API based on this case study?
- Tell me about a time you had to manage a conflict.
Duo Security
Technology Partnerships Manager
Mid Difficult Positive experience Accept offer 15 rounds
Interview process
Phone screen Take home Presentation Panel
Interview formats
Case Presentation Behavioral
The whole thing took about two months from start to finish, but the hiring manager and recruiter kept me in the loop the whole time. This was the toughest interview process I've been through. It started with typical phone screens, then I got a case study. I had to present that case study to a panel. After that, there were more interviews. I think I ended up talking to about 15 different people from the team overall. It was hard, but I learned a lot and grew from the experience.
Confirmed questions2 questions
- Can you discuss your contributions to the case study you worked on?
- Describe the strategic thought process that guided your case study solution.
Duo Security Interview Questions
Quoted word for word from Duo Security interview reports.
“Given two strings that are identical except for one missing character in the first string, find that character which exists in the second string but not the first.”
Read reports →“Given a string array of version numbers, can you tell if the first one is greater?”
Read reports →“Can you determine if a given string reads the same forwards and backward?”
Read reports →“Can you write a function to remove all vowels from a given string?”
Read reports →“Can you write a function that accepts two strings and returns the common characters found in both?”
Read report →“Does the sequence of parentheses have a correct balance of opening and closing pairs?”
Read report →“Can you write a script to find the longest palindrome in a given string?”
Read report →“Can you identify the unique character in the second string compared to the first, given they share all but one character and the first string is missing one character?”
Read report →“Can you reverse the words in a sentence, assuming you can't use any libraries?”
Read report →Formats, difficulty and experience
Across all 147 Duo Security interview reports.