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How to Pass the Sekoia Software Engineer Interview in 2026

The Sekoia DNA (TL;DR)

The technical challenge round at Sekoia often probes for a candidate's ability to design effective threat detection logic within a platform like Sekoia.io. Interviewers prioritize individuals who articulate clear impact on reducing Mean Time To Detect (MTTD) using practical examples.

The Sekoia 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 Sekoia interview outcomes, avoid these common traps:

  • Ignoring the impact of query patterns on storage design.
  • Lack of consideration for fault tolerance and message queuing.
  • Not demonstrating initiative beyond just completing the task.
  • Difficulty managing the rolling window efficiently (adding new, removing old).

Test Yourself: Real Sekoia Questions

Three real prompts pulled from our database.

Type · data structures

Given a large dataset of user activities on the Sekoia platform, implement a data structure that allows for quick retrieval of all activities performed by a specific user within a given time range.

Type · Conflict Resolution

Tell me about a time you had a significant disagreement with a colleague or manager. How did you handle the situation, and what was the resolution?

Type · motivation

What interests you about Sekoia's mission to help organizations build their own cyber defense capabilities, and how do you see your skills contributing to that goal?

+ many more questions, signals, and worked examples

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Sekoia 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 Sekoia's mission to help organizations build their own cyber defense capabilities, and how do you see your skills contributing to that goal?
2

Coding Screen

3
  1. 2

    Type · algorithmic

    Imagine you have a massive log stream from various security devices. You need to detect patterns that indicate a potential threat, like a sequence of specific events occurring within a short time window. Design an algorithm to efficiently identify these sequences.
  2. 3

    Type · data structures

    Given a large dataset of user activities on the Sekoia platform, implement a data structure that allows for quick retrieval of all activities performed by a specific user within a given time range.
  3. + 1 more questions in this round (sign up to unlock)
3

System Design

3
  1. 4

    Type · architecture

    Design a scalable system for ingesting and processing security events from thousands of diverse sources (e.g., firewalls, endpoints, cloud logs) in near real-time for Sekoia's platform.
  2. 5

    Type · trade-offs

    When building a feature to detect anomalous user behavior, what are the trade-offs between using a simpler rule-based system versus a complex machine learning model? Consider accuracy, performance, maintainability, and data requirements.
  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 security alerts, each with a timestamp and severity level, and returns the top K most severe alerts within a rolling N-minute window. Handle potential ties in severity.
  2. 7

    Type · code clarity

    Refactor the following Python code, which simulates a basic threat detection engine, to improve its readability, maintainability, and adherence to best practices. Explain your changes.
  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 manager. How did you handle the situation, and what was the outcome?
  2. 9

    Type · ownership

    Tell me about a time you took ownership of a complex technical problem or project that wasn't explicitly assigned to you. What was the situation, what did you do, and what was the outcome?
  3. + 3 more questions in this round (sign up to unlock)

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Interview tracks at Sekoia

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

Compare Sekoia with similar employers

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