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      Apollo.io

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      Senior Backend Engineer Interview

      16 Apr 2024
      Anonymous interview candidate
      Warsaw, Masovia
      No offer
      Neutral experience
      Average interview

      Application

      I applied through a recruiter. The process took 4 weeks. I interviewed at Apollo.io (Warsaw, Masovia) in Feb 2024

      Interview

      I interviewed in Feb-March 2024 The process took 1.5 months. I was reached out by a recruiter. They proposed to solve the prescreening task in an online platform. There were 2 coding problems (easy and medium) + simple plain questions about your experience. 1 hour to solve and submit. Then I was invited to the Virtual Onsite Round 1 which consisted of 2 interviews in a row: System Design and Behavioral. Nothing special, design a feature of some system considering high availability and large data volumes (make sure you clarify these requirements in advance). On behavioral interview it's recommended to prepare detailed stories since the interviewer most likely will ask for them. A week later, I got positive feedback after Round 1 and was invited to the Virtual Onsite Round 2 which consisted of 2 interviews again: Coding Problem and Deep Dive. The coding problem was about how you solve real practical problems, it wasn't leetcode problem. Deep Dive was about your most recent project where you made an impact. Choose a project that greatly shows your technical and non-technical skills. After that, I was contacted by Senior Recruiter and provided with positive feedback. They told me my level was preliminarily assessed as mid-end L5 (Senior I) but they are still debriefing my results. A week later, I got an email that my candidacy was rejected since my answers in the behavioral interview lacked depth and details, and for the Senior level they are looking for more detailed answers. This was surprising because for this reason they could reject me right after the 1st round and save time. Overall, interesting interview process.
      1

      Other Senior Backend Engineer interview reviews for Apollo.io

      Senior Backend Engineer Interview

      5 Aug 2025
      Anonymous employee
      Accepted offer
      Positive experience
      Difficult interview

      Application

      I interviewed at Apollo.io

      Interview

      Multi step process in the following sequence: - Recruiter screening - Technical interview (DSA focused) - Onsite 1: 1 behavioural interview, followed by 1 system design interview - Onsite 2: 1 system design interview, followed by a technical interview (Design patterns & OOP focus)

      Interview questions [1]

      Question 1

      Build a driver focused application (similar to Uber’s driver app)
      Answer question

      Senior Backend Engineer Interview

      19 Feb 2025
      Anonymous employee
      Hyderābād
      Accepted offer
      Positive experience
      Difficult interview

      Application

      I applied through an employee referral. The process took 5 weeks. I interviewed at Apollo.io (Hyderābād) in Jan 2025

      Interview

      OA + 4 elimination rounds. All 1 hour rounds. 1 - DSA 2 - HLD 3 - HM 4 - Machine Coding The whole process from OA to Offer took about 1.5 months

      Interview questions [1]

      Question 1

      Leetcode Medium in DSA Dynamic Uber Pricing in Machine Coding
      Answer question

      Sr. Backend Engineer Interview

      19 Nov 2024
      Anonymous employee
      Accepted offer
      Positive experience
      Difficult interview

      Application

      I applied online. The process took 4 weeks. I interviewed at Apollo.io in Oct 2024

      Interview

      The interview process at Apollo.io involves five stages: DSA (Data Structures and Algorithms), HLD (High-Level Design), Behavioral, LLD (Low-Level Design), and Offer Discussion, emphasizing technical skills, problem-solving, and cultural fit.

      Interview questions [1]

      Question 1

      DSA + LLD + HLD + Behavioural
      Answer question

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