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How to Pass the Descartes Underwriting Software Engineer Interview in 2026

The Descartes Underwriting DNA (TL;DR)

The technical deep-dive round at Descartes Underwriting evaluates your ability to model complex risks, especially those related to parametric insurance products like Crop Yield Cyber Drought. They seek precision in quantitative analysis and a clear understanding of how data translates into effective risk mitigation for Corporate Solutions.

The Descartes Underwriting 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 Descartes Underwriting interview outcomes, avoid these common traps:

  • Giving a generic answer about wanting to work in fintech.
  • Failing to handle edge cases like missing data points or sudden sensor failures.
  • Portraying themselves as always right and the other person as unreasonable.
  • Inefficient data structures leading to high memory or CPU usage.

Test Yourself: Real Descartes Underwriting Questions

Three real prompts pulled from our database.

Type · algorithmic

Implement a function that calculates the probability of a specific weather event (e.g., hurricane category 3 or higher) occurring in a given region within the next N days, based on historical climate data and potentially a simplified weather model. Discuss the assumptions and limitations of your model.

Type · past-experience

Describe a situation where you disagreed with a technical decision made by your team or lead. How did you handle it, and what was the outcome?

Type · debugging

A user reports that their insurance policy payout calculation is incorrect for a recent weather event. Here's a simplified snippet of the payout logic. Debug this code to find the potential issue.

+ many more questions, signals, and worked examples

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Descartes Underwriting Interview Question Bank

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

9 of 15 questions shown

1

Recruiter Screen

1
  1. 1

    Type · motivation

    What interests you about Descartes Underwriting specifically, given our focus on parametric insurance for climate risks?
2

Coding Screen

3
  1. 2

    Type · algorithmic

    Given a stream of real-time weather data (temperature, wind speed, precipitation) for a specific location, design an algorithm to detect if a 'major storm event' has occurred based on predefined thresholds. The system needs to be efficient for high-volume data.
  2. 3

    Type · algorithmic

    You are given a dataset of historical insurance claims, each with a date, a claim amount, and a geographical region. Write a function to calculate the rolling 30-day average claim amount for each region. Optimize for performance if the dataset is very large.
  3. + 1 more questions in this round (sign up to unlock)
3

System Design

3
  1. 4

    Type · system-design

    Design a system to ingest, process, and store real-time satellite imagery data to monitor crop health for agricultural insurance. Consider data volume, processing latency, and the need for historical analysis.
  2. 5

    Type · system-design

    Design an API for a parametric insurance platform that allows clients to query policy details, trigger payouts based on external data feeds (e.g., weather APIs), and submit new policy requests. Focus on security, reliability, and extensibility.
  3. + 1 more questions in this round (sign up to unlock)
4

Onsite Coding

3
  1. 6

    Type · algorithmic

    Implement a function that calculates the probability of a specific weather event (e.g., hurricane category 3 or higher) occurring in a given region within the next N days, based on historical climate data and potentially a simplified weather model. Discuss the assumptions and limitations of your model.
  2. 7

    Type · coding

    Write a function to simulate the payout process for a portfolio of insurance policies. Each policy has different triggers (e.g., rainfall exceeding X mm, wind speed above Y knots) and payout structures. The function should handle concurrent policy checks and payout calculations efficiently.
  3. + 1 more questions in this round (sign up to unlock)
5

Behavioral / Leadership

5
  1. 8

    Type · Conflict Resolution

    Tell me about a time you had a significant disagreement with a colleague or team member. How did you handle it, and what did you learn?
  2. 9

    Type · past-experience

    Tell me about a time you had to work with a complex, poorly documented legacy system. How did you approach understanding and improving it?
  3. + 3 more questions in this round (sign up to unlock)

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