Moon Active Backend Engineer Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 36 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at Moon Active.
Moon Active
Backend Developer
Mid Difficult Neutral experience No offer 3 rounds
Interview process
Recruiter call Take home Technical screen
Interview formats
Behavioral Technical System Design
First, an HR call where they want to know your knowledge about Moon Active, your motivation for the job, and your career aspirations. After that, a home assignment involving building a small backend application with Redis, with a 1-hour prep time and 3 hours to complete. Finally, a 1-hour technical interview focusing on system design with several follow-up questions.
Confirmed questions6 questions
- Could you tell us about your understanding of Moon Active?
- What's your motivation for applying to this position?
- What are your career goals and what are you seeking in this role?
Moon Active
Backend Developer
Entry Average Positive experience Accept offer 5 rounds
Interview process
Recruiter call Take home Technical screen Background check Offer
Interview formats
Technical Coding
The process was great and everyone was really nice! It started with a phone call, then a take-home assessment for backend development using Redis. After that, there was a technical interview with the team lead about my previous job, followed by an HR interview. Finally, they checked my references.
Confirmed questions2 questions
- Can you tell me about your last role and the projects you worked on?
- The home assessment allows you to use any programming language for backend development with Redis.
Moon Active
Backend Developer
Entry Easy Neutral experience No offer 2 rounds
Interview process
Recruiter call Technical screen Take home
Interview formats
Behavioral Technical Coding
So the first step was like a recruiter call, then I had this technical screen where they asked me to talk about a project I did and also throw in a simple OOP question. After that, there was this AI-assisted interview using Cursor on an existing codebase, and it was all about digging into performance bottlenecks, why we chose a specific database, how to extend a feature, and general architectural stuff.
Confirmed questions6 questions
- Can you describe a past project you were involved in?
- Explain a simple OOP question.
- Identify performance bottlenecks in an existing codebase.
Moon Active Backend Engineer Interview Questions
Quoted word for word from Moon Active interview reports.
“Given a single byte, create a function that returns whether it has an even or odd number of bits set.”
Read reports →“Given a string with words and sentence-ending punctuation (., ?, !), how would you find the sentence with the most words and return that count?”
Read reports →“How would you count the number of set bits in a binary representation of a number?”
Read reports →“Can you write a program to count the number of ones in a binary representation of a number?”
Read reports →“Given two sticks of lengths A and B, what is the largest square you can form using these sticks?”
Read report →“How would you filter out rows that have 'NULL' in them from a CSV formatted string?”
Read report →“Can you design a telephone prefix index?”
Read report →“Could you design a microservice that checks if a given byte has an odd or even number of ones?”
Read report →“Regarding the match sticks problem, how would you use two matches to form the largest possible square?”
Read report →Formats, difficulty and experience
Across all 36 Moon Active interview reports.