How long does the Leonardo interview process take?

Most candidates spend between 4 and 8 weeks from recruiter screen to offer. The onsite loop itself runs in a single day or is split across two half-days, with debrief and offer typically within 5 business days after.

How should I prepare specifically for Leonardo?

Focus on three things: (1) the company DNA shown above — what they actually grade for, (2) the rounds in your loop, especially the round most candidates underestimate, and (3) drilling on the question types in this guide using a structured framework like CIRCLES or STAR.

Does this apply to engineering or design roles at Leonardo?

The DNA stays the same — what changes is the round mix. SWE candidates face coding screens instead of Product Sense; designers face portfolio reviews and design exercises. The "what they value" and behavioral signals carry across all functions.

What interests you specifically about working in the aerospace industry and at Leonardo, given your software engineering background?

Type: motivation. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Given a large dataset of flight paths (represented as sequences of GPS coordinates and timestamps), write a function to efficiently detect potential mid-air collisions within a specified proximity threshold and time window. Assume the dataset is too large to fit into memory.

Type: data-structures. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Design a distributed system for real-time monitoring of Leonardo's drone fleet. The system needs to ingest telemetry data (position, battery, sensor status) from thousands of drones, process it, and provide alerts for anomalies or critical events to ground control.

Type: distributed-systems. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Imagine you are optimizing the pathfinding algorithm for an autonomous drone navigating a complex, dynamic environment with obstacles (e.g., other aircraft, weather patterns). Implement a function that takes a current position, a target destination, and a representation of the environment (e.g., a grid or point cloud) and returns an optimized path, considering fuel constraints and avoiding known hazards.

Type: algorithms. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Tell me about a time you had a significant technical disagreement with a colleague or manager regarding a software design or implementation choice. How did you approach the situation, and what was the outcome?

Type: conflict-resolution. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Describe a situation where you took ownership of a challenging technical problem or project, even when it wasn't explicitly assigned to you. What steps did you take, and what was the impact?

Type: ownership. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Other roles at Leonardo:Software Engineer Supply Chain

Enterprise · Software Engineer Interview Guide

How to Pass the Leonardo Software Engineer Interview in 2026

The Leonardo DNA (TL;DR)

Leonardo values deep technical expertise in aerospace/defense systems, problem-solving skills for complex engineering challenges, and a strong commitment to safety and quality standards. They look for candidates who can collaborate effectively on large-scale projects like radar systems or helicopters.

English original + your local-language translation

Tech and global multinational interviews are most often conducted in English. For industries like luxury, finance, or pharma, the working language may be local. We show every question in English first — alongside your local-language translation — so you can prep in whichever language your interviewer ends up using.

The Leonardo Interview Loop

Your onsite loop will typically consist of 5 rounds.

1
Round 1
Recruiter Screen
Motivation, role fit, logistics.
2
Round 2
Coding Screen
LeetCode-medium algorithmic problems under time pressure.
3
Round 3
System Design
Distributed systems, trade-offs at scale, architecture under constraints.
4
Round 4
Onsite Coding
LeetCode-hard, debugging, code clarity, edge cases.
5
Round 5
Behavioral / Leadership
Past evidence of ownership, influence, resolving conflict.

The Danger Zone: Top Reasons Candidates Fail

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

Not considering potential issues in data input/parsing.
Lack of a robust alerting mechanism or data processing pipeline.
Claiming to learn instantly without detailing the process.
Incorrect implementation of the similarity metric or feature extraction.

Test Yourself: Real Leonardo Questions

Three real prompts pulled from our database.

Type · algorithms

Leonardo develops complex avionics systems. Imagine you need to schedule a series of critical tasks (e.g., sensor readings, control surface adjustments) with dependencies and deadlines. Implement an algorithm to find a valid schedule or determine if no valid schedule exists, prioritizing tasks with tighter deadlines.

Type · architecture

Leonardo is developing a new secure communication module for its aircraft. Design the high-level architecture for this module, considering factors like encryption, key management, data integrity, and integration with existing aircraft systems. Assume limited bandwidth and processing power on some older platforms.

Type · data-structures

Leonardo uses radar systems that generate large volumes of data. You need to implement a data structure to efficiently store and query radar signatures, allowing for fast retrieval of signatures similar to a given input signature based on certain features (e.g., frequency, amplitude patterns).

+ many more questions, signals, and worked examples

Unlock the rubric →

Leonardo Interview Question Bank

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

9 of 15 questions shown

Recruiter Screen

1
Type · motivation
What interests you specifically about working in the aerospace industry and at Leonardo, given your software engineering background?

Coding Screen

2
Type · data-structures
Given a large dataset of flight paths (represented as sequences of GPS coordinates and timestamps), write a function to efficiently detect potential mid-air collisions within a specified proximity threshold and time window. Assume the dataset is too large to fit into memory.
3
Type · algorithms
Leonardo develops complex avionics systems. Imagine you need to schedule a series of critical tasks (e.g., sensor readings, control surface adjustments) with dependencies and deadlines. Implement an algorithm to find a valid schedule or determine if no valid schedule exists, prioritizing tasks with tighter deadlines.
+ 1 more questions in this round (sign up to unlock)

System Design

4
Type · distributed-systems
Design a distributed system for real-time monitoring of Leonardo's drone fleet. The system needs to ingest telemetry data (position, battery, sensor status) from thousands of drones, process it, and provide alerts for anomalies or critical events to ground control.
5
Type · architecture
Leonardo is developing a new secure communication module for its aircraft. Design the high-level architecture for this module, considering factors like encryption, key management, data integrity, and integration with existing aircraft systems. Assume limited bandwidth and processing power on some older platforms.
+ 1 more questions in this round (sign up to unlock)

Onsite Coding

6
Type · algorithms
Imagine you are optimizing the pathfinding algorithm for an autonomous drone navigating a complex, dynamic environment with obstacles (e.g., other aircraft, weather patterns). Implement a function that takes a current position, a target destination, and a representation of the environment (e.g., a grid or point cloud) and returns an optimized path, considering fuel constraints and avoiding known hazards.
7
Type · data-structures
Leonardo uses radar systems that generate large volumes of data. You need to implement a data structure to efficiently store and query radar signatures, allowing for fast retrieval of signatures similar to a given input signature based on certain features (e.g., frequency, amplitude patterns).
+ 2 more questions in this round (sign up to unlock)

Behavioral / Leadership

8
Type · conflict-resolution
Tell me about a time you had a significant technical disagreement with a colleague or manager regarding a software design or implementation choice. How did you approach the situation, and what was the outcome?
9
Type · ownership
Describe a situation where you took ownership of a challenging technical problem or project, even when it wasn't explicitly assigned to you. What steps did you take, and what was the impact?
+ 2 more questions in this round (sign up to unlock)

Unlock the full Leonardo question bank

Free signup, no credit card. You get every question + the framework, grading signals, and worked answer for each.

Unlock all questions →

Interview tracks at Leonardo

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

For SWE, Leonardo emphasizes robust software development for critical embedded systems, real-time processing, and secure network protocols relevant to avionics or defense platforms. Experience with C/C++, Ada, and understanding of safety-critical software lifecycles is key.

algorithms

architecture

+ 1 more

Unlock the Software Engineer grading rubric for Leonardo

See full Software Engineer guide