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      Alarm.com

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      Software Engineer Interview

      6 Dec 2017
      Anonymous interview candidate
      McLean, VA
      No offer
      Negative experience
      Difficult interview

      Application

      I applied online. The process took 5 months. I interviewed at Alarm.com (McLean, VA) in Dec 2017

      Interview

      I applied online in late May and was given a HackerRank coding test. My contact said I scored really well but told me that the position was being put on hold for a few months because they'd recently acquired a company in California. Fine, but I was disappointed because this was only within a few days of me originally applying. Three months later, I followed up with my contact and had a phone interview. Afterwards, I was sent the exact same HackerRank test as before and asked to complete it for a second time. Again, he said I did pretty well and sent me onto the hiring managers. I was told they should get back to him by the next week, but they never did. By then, it was approaching October, and the entire company was apparently busy preparing for some big event. They ignored all my follow-ups for about the next month and a half until my contact finally replied in November. The next couple weeks were spent trying to schedule a day to fly into their HQ. I was told it would be one day but never received any confirmation or travel details before that date had passed. After my contact failed to get that date scheduled, he had to push things back again, but not without mismatching the dates for my flight and hotel reservations for the new interview date. When I finally made it to their HQ, I had four 45-minute interviews with two software engineers and two directors of software engineering. I was also taken to lunch by two other engineers. Once everything was all said and done, I was told to expect a response within 1-2 weeks and was sent on my way home. I received a generic canned response in two business days without the option to reply to the email. This entire process was slow, unorganized, and lackluster.

      Interview questions [7]

      Question 1

      Few behavioral questions, mostly questions about past projects and work experience.
      Answer question

      Question 2

      Describe, at a high level, how a genetic algorithm works.
      Answer question

      Question 3

      What would be the fairest way to pick the top 3 teams in a competition with 20 teams?
      Answer question

      Question 4

      Find a particular element in a given SQL database.
      Answer question

      Question 5

      Given a stream of integers of unknown length, select a random integer from the stream once the stream has been closed. Give pseudocode for a solution that runs in constant space.
      Answer question

      Question 6

      Given the implementation for a BST's iterator, determine the order in which nodes will be returned.
      Answer question

      Question 7

      Debug code
      Answer question
      4

      Other Software Engineer interview reviews for Alarm.com

      Software Engineer Interview

      26 Mar 2026
      Anonymous interview candidate
      No offer
      Neutral experience
      Average interview

      Application

      I interviewed at Alarm.com

      Interview

      Initial recruiter screen, mostly behavioral and past projects and discussion of background. Friendly process thus far. Recruiter was very nice. Only did the first initial phone screening thus far. Hopefully will get a call back.

      Interview questions [1]

      Question 1

      What is a past project that you worked on?
      Answer question
      1

      Software Engineer Interview

      28 Mar 2026
      Anonymous interview candidate
      No offer
      Positive experience
      Average interview

      Application

      I applied online. I interviewed at Alarm.com in Mar 2026

      Interview

      I completed a recruiter screening. It was a positive experience with standard questions about my experience and skills. Conversion was straightforward and focus on my resume, technical background and career goals.

      Interview questions [1]

      Question 1

      Tell me about your background.
      Answer question

      Software Engineer Interview

      8 Aug 2025
      Anonymous interview candidate
      Tysons Corner, VA
      No offer
      Negative experience
      Average interview

      Application

      I applied online. The process took 3 weeks. I interviewed at Alarm.com (Tysons Corner, VA) in May 2025

      Interview

      Steps were: OA -> HR Screen -> Phone Interview -> In Person Interviews (3 back to back) When I arrived at one of the engineering areas for the in person interview, I was struck by the atmosphere. Most of the engineers at their cubicles seemed disinterested and had unpleasant expressions. Many of the engineers were on their phones, appeared bored, one even looked upset. There was a sectioned off area for interns which I found a bit strange considering it was decorated for children (and I wasn't surprised to find they were just on their phones with their shoes off and feet on the chairs). I found this extremely distasteful since myself and many others I knew worked extremely hard for internships during university, and it appears they are given to children who it seemed don't care or value them. The first interviewer seemed as though they did not want to be there, and came in unprepared which wasted time and made me feel unwelcome. To me it appeared as if they did not even want me to succeed, which set a negative tone for the rest of the interviews. From this I got a pretty big wave of performance anxiety which carried out to the other in person interviews, to where I eventually mostly gave up trying half way through. The last interviewer asked probing questions about my most recent work experience project, and I ended up just lying and saying someone else worked on it and I didn't know the details which was untrue. The first interview task was relatively simple and I was disappointed in myself for not being able to fully complete it, although I would like to mostly write it off to the interviewer not being welcoming, and we ran out of time at the end just as I started getting the hang of it. To top it all off, the same first interviewer gave me a snarky comment at the end of the interview, saying something along the lines of "You said you had a few weeks of experience?". I never said this, I have a little over a year at this point. I do not believe I was the only one who had a terrible experience with the manager, since a week or two after being denied, I found the same position reposted. If you want the best performance out of the people you are interviewing, I'd suggest creating a more welcoming environment. It was bittersweet to have been declined a week after the interview since I genuinely was interested in the position (a rarity for me), and I felt I connected and aligned with one of the other managers I interviewed with who seemed like a real mentor, and would have still seriously considered accepting the position even after the negative experience. Some pros: -Quick responses from the recruiter, although a tad slow at times when asked what the next interview would consist of. -Most people I interacted with were very nice and friendly. -Their system for scheduling online and the in person interview was smooth. -Their HQ was neatly decorated and had a great vibe. Overall: If you hate your job and enjoy being on your phone all day at work, I would say this is the team/role for you! And to be completely fair, I can't speak for the other teams or positions, only my own experience for this particular one.

      Interview questions [1]

      Question 1

      Basic and simple software engineering questions, there wasn't anything too specific or difficult.
      Answer question

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