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Growth · Software Engineer Interview Guide

Interview language: English

How to Pass the Exa Software Engineer Interview in 2026

The Exa DNA (TL;DR)

The 'Search Engine for Developers' ethos at Exa emphasizes a candidate's ability to simplify complex technical challenges and articulate their reasoning clearly. They assess for deep understanding of developer workflows and how their products like Exa Connect enhance productivity.

The Exa 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 Exa interview outcomes, avoid these common traps:

  • Not considering edge cases like users with no activity or activity spanning across the 30-day boundary.
  • Inefficiently iterating through all possible subsequences instead of a linear scan.
  • Using a naive approach that iterates through all historical events for each query.
  • Incorrectly handling nested objects or arrays.

Test Yourself: Real Exa Questions

Three real prompts pulled from our database.

Type · algorithmic

Given a list of user sessions, where each session is a list of timestamps representing page views, write a function to find the longest consecutive sequence of page views within any single session. For example, if session A has timestamps [10, 20, 30, 40] and session B has [5, 15, 25, 35, 45], the longest consecutive sequence is 5 (from session B).

Type · architecture

Exa wants to introduce a feature that allows customers to upload large datasets (e.g., CSV files up to 1GB) for analysis. Design the backend system for handling these uploads, processing the data, and making it available for querying. Focus on efficiency, error handling, and user experience.

Type · ownership

Tell me about a time you encountered a significant technical challenge or bug in a project that wasn't explicitly assigned to you. What steps did you take to address it, and what was the outcome?

+ many more questions, signals, and worked examples

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Exa Interview Question Bank

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

9 of 14 questions shown

1

Recruiter Screen

1
  1. 1

    Type · motivation

    What interests you about Exa's mission to help companies grow through data and AI, and how do you see your skills contributing to that mission?
2

Coding Screen

3
  1. 2

    Type · algorithmic

    Given a list of user sessions, where each session is a list of timestamps representing page views, write a function to find the longest consecutive sequence of page views within any single session. For example, if session A has timestamps [10, 20, 30, 40] and session B has [5, 15, 25, 35, 45], the longest consecutive sequence is 5 (from session B).
  2. 3

    Type · algorithmic

    Imagine Exa tracks user engagement events. You receive a stream of events, each with a user ID and a timestamp. Design a data structure and algorithm to efficiently return the count of unique users who were active in the last 'k' minutes. Assume 'k' is a parameter.
  3. + 1 more questions in this round (sign up to unlock)
3

System Design

3
  1. 4

    Type · architecture

    Design a real-time notification system for Exa that alerts users when key metrics in their dashboard cross predefined thresholds. Consider scalability, reliability, and the ability for users to configure their own thresholds and notification preferences.
  2. 5

    Type · architecture

    Exa wants to introduce a feature that allows customers to upload large datasets (e.g., CSV files up to 1GB) for analysis. Design the backend system for handling these uploads, processing the data, and making it available for querying. Focus on efficiency, error handling, and user experience.
  3. + 1 more questions in this round (sign up to unlock)
4

Onsite Coding

3
  1. 6

    Type · algorithmic

    Implement a function that takes a list of user IDs and their associated 'last login' timestamps. Return the user IDs sorted by their last login time in descending order. If two users have the same login time, maintain their relative order (stable sort). Handle cases where a user might have multiple login entries; consider only the latest one.
  2. 7

    Type · algorithmic

    Given a JSON object representing a nested user preference structure, write a function to flatten it into a single-level object where keys are dot-separated paths (e.g., 'user.profile.email'). Handle arrays by appending indices to the path (e.g., 'user.addresses[0].street').
  3. + 1 more questions in this round (sign up to unlock)
5

Behavioral / Leadership

4
  1. 8

    Type · ownership

    Tell me about a time you encountered a significant technical challenge or bug in a project that wasn't explicitly assigned to you. What steps did you take to address it, and what was the outcome?
  2. 9

    Type · collaboration

    Describe a situation where you had a technical disagreement with a colleague or team lead regarding an implementation detail or architectural choice. How did you approach the discussion, and what was the resolution?
  3. + 2 more questions in this round (sign up to unlock)

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Interview tracks at Exa

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

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