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Growth · Software Engineer Interview Guide

Applies via Ashby

How to Pass the Pleo Software Engineer Interview in 2026

The Pleo DNA (TL;DR)

Pleo values candidates demonstrating strong collaboration, ownership, and a customer-first mindset, crucial for simplifying spending. They seek proactive, adaptable individuals who thrive in a fast-paced, product-led fintech environment, showing genuine interest in innovation.

The Pleo 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 Pleo interview outcomes, avoid these common traps:

  • Introducing new bugs during the refactoring process.
  • Focusing only on the negative outcome without discussing recovery or lessons learned.
  • Not considering denormalization or read replicas for performance optimization.
  • Inefficient sorting or searching, leading to O(n^2) or worse complexity.

Test Yourself: Real Pleo Questions

Three real prompts pulled from our database.

Type · Influence

Tell me about a time you had to influence stakeholders (e.g., leadership, sales, engineering) who were initially resistant to your product idea or direction. How did you gain their buy-in?

Type · api-design

Design an API for Pleo's expense reporting system. Consider endpoints for creating expenses, fetching expenses, updating status (e.g., pending, approved, rejected), and generating reports. Discuss authentication, rate limiting, and data validation.

Type · code-quality

Refactor the following Python code snippet, which calculates user spending categories, to improve its readability, maintainability, and efficiency. Pay attention to variable naming, function decomposition, and error handling.

+ many more questions, signals, and worked examples

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Pleo Interview Question Bank

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

9 of 24 questions shown

1

Recruiter Screen

1
  1. 1

    Type · motivation

    What interests you about working at Pleo, specifically within our fintech space and our mission to simplify business spending?
2

Coding Screen

3
  1. 2

    Type · data-structure-algorithm

    Given a list of transactions, each with a timestamp and an amount, write a function to calculate the total spending for a given user within a specified time range. Assume transactions are not necessarily sorted by time.
  2. 3

    Type · data-structure-algorithm

    Implement a function that takes a list of user IDs and returns the top K users who have spent the most in the last 30 days. You can assume a helper function `getUserSpending(userId, startDate, endDate)` exists.
  3. + 1 more questions in this round (sign up to unlock)
3

System Design

4
  1. 4

    Type · api-design

    Design an API for Pleo's expense reporting system. Consider endpoints for creating expenses, fetching expenses, updating status (e.g., pending, approved, rejected), and generating reports. Discuss authentication, rate limiting, and data validation.
  2. 5

    Type · distributed-systems

    How would you design a system to detect and prevent fraudulent transactions in real-time for Pleo? Consider data sources, processing logic, latency requirements, and potential false positives/negatives.
  3. + 2 more questions in this round (sign up to unlock)
4

Onsite Coding

3
  1. 6

    Type · debugging

    A user reports that their company's total spending report is showing an incorrect amount. The report is generated by aggregating data from multiple microservices. Describe your process for debugging this issue, starting from the user's report to identifying the root cause.
  2. 7

    Type · code-quality

    Refactor the following Python code snippet, which calculates user spending categories, to improve its readability, maintainability, and efficiency. Pay attention to variable naming, function decomposition, and error handling.
  3. + 1 more questions in this round (sign up to unlock)
5

Behavioral / Leadership

13
  1. 8

    Type · Conflict Resolution

    Tell me about a time you had a significant disagreement with a cross-functional team member (e.g., engineer, designer, marketer) about a product decision. How did you approach it, and what was the outcome?
  2. 9

    Type · Influence

    Tell me about a time you had to influence stakeholders (e.g., leadership, sales, engineering) who were initially resistant to your product idea or direction. How did you gain their buy-in?
  3. + 11 more questions in this round (sign up to unlock)

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Interview tracks at Pleo

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

Compare Pleo with similar employers

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