Zerto Backend Engineer Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 5 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at Zerto.
Zerto
Backend Engineer
Intern Average Positive experience Accept offer 5 rounds
Interview process
Recruiter call Take home Technical screen Onsite Phone screen
Interview formats
Technical Coding System Design Behavioral
Got referred by someone working there. About two weeks later, HR called. Got a C# take-home test on threads, took about 3 hours. Got good feedback the next day and scheduled an onsite interview for a week later. The HR person said it would be about the take-home test, but it wasn't. The onsite day was packed with 4 interviews: 3 hours of technical interviews and 1 HR interview. They decided if they wanted to proceed after the first two technical interviews. A few days after that, they set up another interview with a backend team leader via Teams.
Confirmed questions4 questions
- Can you talk about the take-home assignment and then design a data structure that supports set, get, and setAll operations in constant time?
- If two linked lists intersect, find the node where they merge.
- Design a system for a specific company-related task, focusing solely on system design.
Zerto
Backend Developer
Entry Easy Negative experience Decline offer 2 rounds
Interview process
Recruiter call Technical screen Phone screen
Interview formats
Behavioral Technical System Design
I applied and after about a week, a recruiter called to set up the first interview. It was about an hour long and included questions about my previous project and a system design for image processing. After another week and a half, I had the second interview, which was a 4-hour technical one. They asked me to read and fix code for a backend system handling poll results, categorizing them as authorized or not, and allowing retrieval. I decided not to proceed after the second interview. The interviewers were okay, but I didn't like how intrusive they were in the second interview. The office setting was also strange, with a mix of high-floor and low-floor offices, some looking a bit run-down, which didn't give a startup vibe.
Confirmed questions4 questions
- Can you tell me about your last project?
- Design an image processing system where users can apply filters and save the image.
- Explain database indexing and search algorithms.
Zerto
Backend Developer
Mid Difficult Positive experience No offer 3 rounds
Interview process
Technical screen Onsite
Interview formats
Technical System Design Group
The whole thing happened in a single day and there were several candidates present. They started with a company introduction. Then there was a technical interview where I had to implement a queue using stacks, and also answer a system design question about the producer-consumer problem. Finally, I interviewed with two team leaders.
Confirmed questions2 questions
- Implement a queue using stacks.
- Design a producer-consumer system.
Zerto Backend Engineer Interview Questions
Quoted word for word from Zerto interview reports.
“Implement a queue using stacks.”
Read reports →“Can you determine if two linked lists intersect?”
Read reports →“Explain database indexing and search algorithms.”
Read reports →“Design an image processing system where users can apply filters and save the image.”
Read reports →“Design a producer-consumer system.”
Read report →“Can you talk about the take-home assignment and then design a data structure that supports set, get, and setAll operations in constant time?”
Read report →“How would you design a Paint program with two initial buttons, and then add undo/redo capabilities? This is a system design question.”
Read report →“What are your thoughts on virtual memory, heap, context switching, and thread deadlocks?”
Read report →“Design a system for a specific company-related task, focusing solely on system design.”
Read report →Formats, difficulty and experience
Across all 5 Zerto interview reports.