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Growth · Software Engineer Interview Guide

How to Pass the Idealista Software Engineer Interview in 2026

Το DNA της Idealista (TL;DR)

Idealista values candidates who demonstrate strong problem-solving skills, a user-centric mindset, and the ability to adapt to a fast-paced, data-driven environment. They seek individuals passionate about real estate tech and improving the property search experience.

Οι συνεντεύξεις tech διεξάγονται στα αγγλικά

Ακόμη κι όταν κάνετε αίτηση τοπικά, η ίδια η συνέντευξη γίνεται σχεδόν πάντα στα αγγλικά. Σας δείχνουμε κάθε ερώτηση και prompt πρώτα στα αγγλικά — τη γλώσσα στην οποία θα γίνει η συνέντευξη — με μετάφραση από κάτω για να προετοιμαστείτε στην ισχυρότερη γλώσσα σας.

Το Interview Loop της Idealista

Το onsite loop σας θα αποτελείται τυπικά από 5 γύρους.

  1. 1

    Γύρος 1

    Recruiter Screen
    Motivation, role fit, logistics.
  2. 2

    Γύρος 2

    Coding Screen
    LeetCode-medium algorithmic problems under time pressure.
  3. 3

    Γύρος 3

    System Design
    Distributed systems, trade-offs at scale, architecture under constraints.
  4. 4

    Γύρος 4

    Onsite Coding
    LeetCode-hard, debugging, code clarity, edge cases.
  5. 5

    Γύρος 5

    Behavioral / Leadership
    Past evidence of ownership, influence, resolving conflict.

Η ζώνη κινδύνου: Κορυφαίοι λόγοι που οι υποψήφιοι αποτυγχάνουν

Με βάση τη βάση δεδομένων μας με αποτελέσματα συνεντεύξεων Idealista, αποφύγετε αυτές τις συνηθισμένες παγίδες:

  • Overly simplistic regex that misses valid variations or incorrectly parses numbers.
  • Designing a chatty API with too many small endpoints instead of a few well-defined ones.
  • Not considering the infrastructure needed for uploading and processing large media files.
  • Not considering rate limiting, authentication, or error handling in the API design.

Δοκιμάστε τον εαυτό σας: Πραγματικές ερωτήσεις Idealista

Τρία πραγματικά prompts τραβηγμένα από τη βάση δεδομένων μας.

Τύπος · Conflict Resolution

Tell me about a time you had a significant disagreement with a stakeholder (e.g., engineering lead, marketing manager, executive) about a product decision. How did you approach the situation, and what was the outcome?

Τύπος · Debugging

A user reports that search results for 'apartments in Madrid' are sometimes missing properties that they know are listed. Analyze the provided (simplified) codebase for the search service and identify potential bugs or performance bottlenecks that could cause this issue. Fix the code.

Τύπος · Ownership

Tell me about a time you took initiative to solve a problem that wasn't explicitly part of your job description. What was the situation, what did you do, and what was the outcome?

+ πολλές ακόμη ερωτήσεις, σήματα και επεξεργασμένα παραδείγματα

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Idealista Interview Question Bank

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

9 of 19 questions shown

1

Recruiter Screen

1
  1. 1

    Τύπος · Motivation

    What interests you about working at Idealista, specifically within a SaaS environment focused on real estate?
2

Coding Screen

3
  1. 2

    Τύπος · Algorithm

    Given a dataset of property listings with features like price, location, and number of rooms, design an algorithm to efficiently find the top K most similar properties to a given property, considering a weighted combination of these features. Assume the dataset can be very large.
  2. 3

    Τύπος · Data Structures

    Implement a Least Recently Used (LRU) cache for storing property search results. The cache should have a fixed capacity, and when it's full, it should evict the least recently used item to make space for new items. Consider thread safety if multiple users might access the cache concurrently.
  3. + 1 more questions in this round (sign up to unlock)
3

System Design

3
  1. 4

    Τύπος · API Design

    Design the API for a 'Similar Properties' recommendation service. Consider the request/response formats, potential query parameters (e.g., property ID, user preferences), and how to handle scalability for millions of properties and users.
  2. 5

    Τύπος · Scalability

    How would you design a system to handle real-time updates for property availability and pricing across Idealista's platform? Consider the challenges of high write volume and ensuring consistency for users viewing listings.
  3. + 1 more questions in this round (sign up to unlock)
4

Onsite Coding

3
  1. 6

    Τύπος · Debugging

    A user reports that search results for 'apartments in Madrid' are sometimes missing properties that they know are listed. Analyze the provided (simplified) codebase for the search service and identify potential bugs or performance bottlenecks that could cause this issue. Fix the code.
  2. 7

    Τύπος · Algorithm

    Implement a function to calculate the optimal pricing strategy for a property listing based on historical data, market trends, and user engagement. The function should return a suggested price range and the confidence level of that suggestion. Consider edge cases like new listings with no history.
  3. + 1 more questions in this round (sign up to unlock)
5

Behavioral / Leadership

9
  1. 8

    Τύπος · Conflict Resolution

    Tell me about a time you had a significant disagreement with a stakeholder (e.g., engineering lead, marketing manager, executive) about a product decision. How did you approach the situation, and what was the outcome?
  2. 9

    Τύπος · Conflict Resolution

    Tell me about a time you had a significant technical disagreement with a colleague or manager. How did you approach the situation, what was the outcome, and what did you learn?
  3. + 7 more questions in this round (sign up to unlock)

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Interview tracks at Idealista

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

SWEs at Idealista are evaluated on their ability to build scalable, robust systems for high-traffic real estate platforms. Expect questions on data structures, algorithms, system design for features like search indexing or real-time notifications, and experience with relevant tech stacks like Java/Kotlin, Python, or Go.

Conflict Resolution

Tell me about a time you had a significant disagreement with a stakeholder (e.g., engineering lead, marketing manager, executive) about a product decision. How did you approach the situation, and what was the outcome?

Debugging

A user reports that search results for 'apartments in Madrid' are sometimes missing properties that they know are listed. Analyze the provided (simplified) codebase for the search service and identify potential bugs or performance bottlenecks that could cause this issue. Fix the code.

+ 1 more

Unlock the Software Engineer grading rubric for Idealista

See full Software Engineer guide

Compare Idealista with other tech interviews

Same DNA, different bar. Browse the closest companies in our database and see how their loops differ.

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