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Growth · Software Engineer Interview Guide

How to Pass the Subito Software Engineer Interview in 2026

The Subito DNA (TL;DR)

Subito values candidates who demonstrate a strong agile mindset, data-driven decision-making, and a user-centric approach to problem-solving. They seek collaborative individuals passionate about building impactful products for their leading classifieds platform, focusing on continuous improvement and innovation.

The Subito Interview Loop

Your onsite loop will typically consist of 5 rounds.

  1. 1

    Round 1

    Recruiter Screen
    Motivation, role fit, logistics.
  2. 2

    Round 2

    Coding Screen
    LeetCode-medium algorithmic problems under time pressure.
  3. 3

    Round 3

    System Design
    Distributed systems, trade-offs at scale, architecture under constraints.
  4. 4

    Round 4

    Onsite Coding
    LeetCode-hard, debugging, code clarity, edge cases.
  5. 5

    Round 5

    Behavioral / Leadership
    Past evidence of ownership, influence, resolving conflict.

The Danger Zone: Top Reasons Candidates Fail

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

  • Ignoring invalid inputs (e.g., negative quantities, zero prices).
  • Focusing only on the technology without mentioning how it applied to the project.
  • Overly simplistic API without considering different recommendation types.
  • Inefficient frequency counting (e.g., repeated linear scans).

Test Yourself: Real Subito Questions

Three real prompts pulled from our database.

Type · Motivation

Why are you interested in working at Subito, and what specifically about our retail platform excites you as a software engineer?

Type · Ownership

Tell me about a time you took ownership of a marketing project or initiative that was failing or at risk. What steps did you take, and what was the outcome?

Type · Algorithms

Subito wants to implement a 'recently viewed items' feature. Given a stream of product IDs representing user views, design a data structure that can efficiently add a view and retrieve the last N unique products viewed by a user in chronological order.

+ many more questions, signals, and worked examples

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Subito Interview Question Bank

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

9 of 21 questions shown

1

Recruiter Screen

1
  1. 1

    Type · Motivation

    Why are you interested in working at Subito, and what specifically about our retail platform excites you as a software engineer?
2

Coding Screen

3
  1. 2

    Type · Data Structures

    Given a list of user sessions on Subito, where each session contains a list of product IDs viewed, write a function to find the top K most frequently viewed products across all sessions. Assume product IDs are integers.
  2. 3

    Type · Algorithms

    Subito wants to implement a 'recently viewed items' feature. Given a stream of product IDs representing user views, design a data structure that can efficiently add a view and retrieve the last N unique products viewed by a user in chronological order.
  3. + 1 more questions in this round (sign up to unlock)
3

System Design

3
  1. 4

    Type · API Design

    Design the API for Subito's product recommendation service. Consider endpoints for fetching recommendations based on user history, product similarity, and potentially real-time trends. Discuss data formats, request/response structures, and potential rate limiting.
  2. 5

    Type · Scalability

    Subito experiences massive traffic spikes during holiday sales. How would you design a system to handle a 10x increase in traffic for the product listing page, ensuring low latency and high availability?
  3. + 1 more questions in this round (sign up to unlock)
4

Onsite Coding

4
  1. 6

    Type · Algorithms

    Implement a function to find the shortest path between two product categories in Subito's product hierarchy, represented as a tree or a directed acyclic graph (DAG). Consider potential optimizations.
  2. 7

    Type · Debugging

    A critical bug is reported: users are sometimes seeing incorrect pricing on the checkout page. The backend team suspects an issue with a recently deployed microservice handling price calculations. How would you approach debugging this issue systematically?
  3. + 2 more questions in this round (sign up to unlock)
5

Behavioral / Leadership

10
  1. 8

    Type · Past Experience

    Tell me about a time you had to influence a cross-functional team (e.g., engineering, marketing, design) to adopt your product vision or strategy when there was initial resistance.
  2. 9

    Type · Conflict Resolution

    Tell me about a time you had a significant disagreement with a colleague or stakeholder. How did you approach the situation, and what was the outcome?
  3. + 8 more questions in this round (sign up to unlock)

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Interview tracks at Subito

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

SWEs are evaluated on strong technical fundamentals, problem-solving, and experience building scalable, reliable systems, often using microservices. Highlight collaboration in agile teams, code quality, and ability to contribute to a high-traffic platform like Subito.

Motivation

Why are you interested in working at Subito, and what specifically about our retail platform excites you as a software engineer?

Ownership

Tell me about a time you took ownership of a marketing project or initiative that was failing or at risk. What steps did you take, and what was the outcome?

+ 1 more

Unlock the Software Engineer grading rubric for Subito

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Compare Subito with other tech interviews

Same DNA, different bar. Browse the closest companies in our database and see how their loops differ.

Practice Subito interviews end-to-end

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