Other roles at Preply:Product Manager Software Engineer Sales Marketing Customer Success

Growth · Software Engineer Interview Guide

Interview language: English

How to Pass the Preply Software Engineer Interview in 2026

The Preply DNA (TL;DR)

Preply's hiring process emphasizes a candidate's ability to drive tangible results in a dynamic environment, particularly how they've scaled educational platforms. They seek individuals who can articulate their impact on user growth and tutor engagement, aligning with the ethos promoted on Preply Careers.

The Preply Interview Loop

Your onsite loop will typically consist of 5 rounds.

1
Round 1
Recruiter Screen
Motivation, role fit, logistics.
2
Round 2
Coding Screen
LeetCode-medium algorithmic problems under time pressure.
3
Round 3
System Design
Distributed systems, trade-offs at scale, architecture under constraints.
4
Round 4
Onsite Coding
LeetCode-hard, debugging, code clarity, edge cases.
5
Round 5
Behavioral / Leadership
Past evidence of ownership, influence, resolving conflict.

The Danger Zone: Top Reasons Candidates Fail

Based on our database of Preply interview outcomes, avoid these common traps:

Not demonstrating empathy or understanding of the stakeholder's perspective.
Not adequately explaining the rationale behind the changes.
Lack of indexing for common query patterns.
Inefficiently checking for keyword presence in specialties.

Test Yourself: Real Preply Questions

Three real prompts pulled from our database.

Type · Algorithmic Thinking

Imagine Preply wants to implement a feature to find the 'best' available tutor for a student based on a complex set of criteria (e.g., tutor rating, response time, price, matching learning goals, availability). Write a function that takes a student's request and a list of available tutors, and returns the ID of the top-ranked tutor. Discuss how you would define and calculate the 'rank'.

Type · Data Structures

Given a list of user sessions on Preply, where each session has a start time and end time, write a function to find the maximum number of concurrent sessions at any point in time. Assume sessions are represented as tuples (start_time, end_time).

Type · Real-time Features

Design a real-time notification system for Preply that alerts students when a tutor they follow becomes available or when a booked lesson is about to start. Discuss the technologies and architecture.

+ many more questions, signals, and worked examples

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Preply Interview Question Bank

A sample from our database, grouped by round. Sign up to see the full set.

9 of 21 questions shown

Recruiter Screen

1
Type · Motivation
What interests you about working at Preply, and how do you see your skills contributing to our mission of connecting language learners with tutors?

Coding Screen

2
Type · Data Structures
Given a list of user sessions on Preply, where each session has a start time and end time, write a function to find the maximum number of concurrent sessions at any point in time. Assume sessions are represented as tuples (start_time, end_time).
3
Type · String Manipulation
Implement a function that takes a list of tutor profiles (each with a 'name' and 'specialties' field, where 'specialties' is a list of strings) and a search query string. Return a list of tutor names whose specialties contain all the keywords from the search query (case-insensitive, partial matches allowed).
+ 1 more questions in this round (sign up to unlock)

System Design

4
Type · Scalability
How would you design a system to recommend relevant tutors to students based on their learning goals, past interactions, and tutor specialties? Consider scalability for millions of users and tutors.
5
Type · Real-time Features
Design a real-time notification system for Preply that alerts students when a tutor they follow becomes available or when a booked lesson is about to start. Discuss the technologies and architecture.
+ 1 more questions in this round (sign up to unlock)

Onsite Coding

6
Type · Algorithmic Thinking
Imagine Preply wants to implement a feature to find the 'best' available tutor for a student based on a complex set of criteria (e.g., tutor rating, response time, price, matching learning goals, availability). Write a function that takes a student's request and a list of available tutors, and returns the ID of the top-ranked tutor. Discuss how you would define and calculate the 'rank'.
7
Type · Debugging
A student reports that sometimes, after booking a lesson, the lesson details page shows incorrect information (e.g., wrong tutor, wrong time). Analyze the following simplified code snippet and identify potential bugs or race conditions that could cause this issue. Suggest fixes.
+ 1 more questions in this round (sign up to unlock)

Behavioral / Leadership

8
Type · Past Experience
Tell me about a time you had to influence a stakeholder (e.g., engineering, marketing, sales) who had a different opinion or priority than you. How did you approach it, and what was the outcome?
9
Type · Ownership
Tell me about a time you took ownership of a problem that wasn't strictly your responsibility. What was the situation, and what did you do?
+ 9 more questions in this round (sign up to unlock)

Unlock all 21 Preply questions, free

No credit card. Every question with its framework, the grading signals interviewers score against, and a worked answer for each.

Unlock all 21 Preply questions

Interview tracks at Preply

How Preply's DNA translates across functions. Pick your role.

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Practice Preply interviews end-to-end

Preply Mock Interview

Run a live mock interview with our AI interviewer using Preply-style prompts. Get scored on structure, signal, and answer length - exactly how the real loop grades you.

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STAR Stories for Preply Behavioral Rounds

Build a Story Bank of your past wins, mapped to the leadership signals Preply interviewers grade on. Reuse them across every behavioral round.

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Preply Interview Prep Hub

The frameworks behind every Preply round: CIRCLES for product sense, hypothesis-driven debugging for analytical, STAR for behavioral. Learn each one in 10 minutes.

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Interview Frameworks

CIRCLES, STAR, AARRR, RICE, MECE. The exact frameworks that make Preply interviewers nod instead of frown. Step-by-step playbooks with the moves and the pitfalls.

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Sample answers

What a strong answer to these Preply interview questions shows.

A strong answer shows: Ability to translate complex requirements into code.; Algorithmic thinking for ranking and optimization.; Handling edge cases and defining clear logic.; Understanding of trade-offs in feature weighting..

A strong answer shows: Ability to model a real-world problem using data structures.; Understanding of interval problems and sweep-line algorithms.; Efficient time and space complexity..

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