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      Fortinet

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      Senior Software Engineer Interview

      Jul 16, 2026
      Anonymous employee
      Ottawa, ON
      Accepted offer
      Positive experience
      Average interview

      Application

      I applied online. I interviewed at Fortinet (Ottawa, ON) in Feb 2024

      Interview

      Had first phone interview with HR to discuss the role, this felt more like a behavioral round. They asked me questions about my previous work experience and education, just to figure out if I meet their engineering managers requirements. After a couple of days, they setup a coding interview on teams. Instead of having multiple coding round, they had 3 engineers interview me all at once. They asked me in depth questions on C++ and asked me to implement a singleton class. They were not focused on every minor details, neither did they want me to run any of the code they asked me to write. They were mostly focused on problem solving, logic and code structure. Later in a few days, out of the blue, I received a call from engineering directory. They asked me if I had some free time(which the then un-employed me had plenty of) and proceeded with the interview. He asked me questions on smart pointers and more topics around it.

      Interview questions [1]

      Question 1

      Implement a singleton class and asked about its uses.
      Answer question

      Other Senior Software Engineer Interview Reviews for Fortinet

      Senior Software Engineer Interview

      Sep 16, 2024
      Anonymous Interview Candidate
      San Francisco, CA
      No offer
      Positive experience
      Difficult interview

      Application

      I applied through an employee referral. The process took 2 weeks. I interviewed at Fortinet (San Francisco, CA) in May 2024

      Interview

      A 3-hour technical interview with the team, asking basic algorithm and data stucture and system design and my experience in ML. The team was nice and the interview process was very informative.

      Interview questions [1]

      Question 1

      Basically problems from Leetcode, and some ML basics.
      Answer question

      Senior Software Engineer Interview

      Dec 15, 2023
      Anonymous Interview Candidate
      Pune
      No offer
      Negative experience
      Difficult interview

      Application

      I applied in-person. The process took 4 weeks. I interviewed at Fortinet (Pune) in Nov 2023

      Interview

      I applied for Sr. software engineer (Python fullstack) position for FortiSOAR product. 5 Round of interview- Round 1: Hackerrank Test: This had two codding problem questions and 15 MCQ related to web technologies. This was good, I cleared the test then I got call from HR for second round. Round 2: Technical Round, Asked me about my projects and then problem solving question started. After 2-3 codding problems (medium), asked about microservices, auth, session, cookies etc. I cleared this round then got call for next interview Round 3: Technical 2- Started with oops and some desgin pattern, then multitasking/ async programming and few frontend technologies. I cleared 3rd round as well, then got call from HR, she said they will share some problem statement with me, and mentioned to complete within 4 day. I have to design end-to-end application, from HLD to running application, I completed and shared in 4 day. Then HR informed they wil schedule for project discussion. Round 4: Project Demo, I gave demo and explained my approach. They asked my why I choose that technology, some design questions, db schema related questions. After that HR informed that I have cleared interview and final round will be with hiring manager. Round 5: Manager round, Asked about my last project, gave some problem statement and few behavioral questions. Then I got call from HR that got positive response from manager and they will update me further. After 1 week, also they didnt update, then after multiple followup email HR told that they put requirement On-Hold and let me know when it is opened. After 1 month, I saw again HR's linkedin post, about same position, that position was re-opened. Then I asked about my application if we can proceed, HR told that after checking with manager I'll be informed, and then surprise - No reply. Not sure why they play this kind of game after clearing all round and spending too much time on building project and on interview, this kind of response is disappointed. Thanks!

      Interview questions [1]

      Question 1

      oops, dsa, multithreading, authentication, microservices, web technologies etc,
      Answer question
      1

      Fortinet interviews FAQs

      • Senior Software Engineer applicants have rated the interview process at Fortinet with 3.3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 67% positive. To compare, the company-average is 65.2% positive. This is according to Glassdoor user ratings.
      • Candidates applying for Senior Software Engineer roles take an average of 13 days to get hired, when considering 6 user submitted interviews for this role. To compare, the hiring process at Fortinet overall takes an average of 38 days.
      • Common stages of the interview process at Fortinet as a Senior Software Engineer according to 6 Glassdoor interviews include:

        Skills test:  23%

        One on one interview:  23%

        Group panel interview:  15%

        Background check:  15%

        Phone interview:  15%

        Presentation:  8%

      • Here are the most commonly searched roles for interview reports -

        1. Systems Engineer(201) ;
        2. Technical Support Engineer(162) ;
        3. Software Engineer(101) ;
        4. TAC Engineer(98) ;
        5. Major Account Manager(86) ;
        6. Account Manager(55) ;
        7. Software Developer(53) ;
        8. Business Development Representative (BDR)(52) ;
        9. Senior Software Engineer(42) ;
        10. Inside Sales Representative(39) ;
        11. Regional Account Manager(39) ;
        12. Sales(39) ;
        13. Software QA Engineer(35) ;
        14. Channel Account Manager(28) ;
        15. Manager(25) .


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