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Growth · Οδηγός συνέντευξης Software Engineer

Applies via Welcome to the Jungle

Πώς να περάσετε τη συνέντευξη Software Engineer της Valiuz το 2026

Το DNA της Valiuz (TL;DR)

Valiuz values strong analytical and data-driven problem-solving skills, particularly in applying insights to advertising and business growth. They assess candidates' ability to translate complex data into actionable strategies and thrive in a fast-paced, impact-focused environment.

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 Valiuz

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 Valiuz, αποφύγετε αυτές τις συνηθισμένες παγίδες:

  • Not considering the velocity and volume of data required for real-time detection.
  • Not considering scenarios with very few users in a segment.
  • Failing to show ownership beyond the initial implementation.
  • Over-engineering or making the code unnecessarily complex.

Δοκιμάστε τον εαυτό σας: Πραγματικές ερωτήσεις Valiuz

Τρία πραγματικά prompts τραβηγμένα από τη βάση δεδομένων μας.

Τύπος · System Design

Design a data pipeline to aggregate ad performance metrics (impressions, clicks, conversions) from various sources into a data warehouse for reporting. Discuss data ingestion, transformation, and storage.

Τύπος · Technical Decision Making

Tell me about a technically challenging decision you had to make on a project. What were the options, what factors did you consider, and why did you choose the path you did?

Τύπος · Code Clarity

Refactor this piece of code [provide a complex, poorly structured function related to ad targeting logic] to improve its readability, maintainability, and testability. Explain your changes.

+ πολλές ακόμη ερωτήσεις, σήματα και επεξεργασμένα παραδείγματα

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Valiuz Interview Question Bank

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

9 of 20 questions shown

1

Recruiter Screen

1
  1. 1

    Τύπος · Motivation

    What interests you about working at Valiuz, specifically within the advertising technology space?
2

Coding Screen

3
  1. 2

    Τύπος · Algorithmic

    Given a stream of ad impression events, each with a timestamp and a campaign ID, design an algorithm to calculate the number of unique campaigns shown in the last 5 minutes. Assume the stream can be very large.
  2. 3

    Τύπος · Algorithmic

    Implement a function that takes a list of ad creatives (each with an ID and a list of target audience segments) and a user profile (with a list of segments they belong to). Return a list of ad creative IDs that match at least one segment in the user's profile. Optimize for performance when the number of creatives and segments is large.
  3. + 1 more questions in this round (sign up to unlock)
3

System Design

3
  1. 4

    Τύπος · System Design

    Design a real-time bidding (RTB) system for ad impressions. Consider the components involved, data flow, latency requirements, and scalability.
  2. 5

    Τύπος · System Design

    Design a system to detect and filter out fraudulent ad clicks. How would you identify suspicious patterns, and what technologies would you use?
  3. + 1 more questions in this round (sign up to unlock)
4

Onsite Coding

3
  1. 6

    Τύπος · Algorithmic

    Given a large dataset of user browsing history (user ID, page URL, timestamp), write a function to find the top K most frequently visited pages for a specific user, within a given time range. Handle potential memory constraints.
  2. 7

    Τύπος · Code Clarity

    Refactor this piece of code [provide a complex, poorly structured function related to ad targeting logic] to improve its readability, maintainability, and testability. Explain your changes.
  3. + 1 more questions in this round (sign up to unlock)
5

Behavioral / Leadership

10
  1. 8

    Τύπος · Past Experience

    Tell me about a time you had to influence a senior stakeholder or engineering team to adopt your product vision when they were initially resistant.
  2. 9

    Τύπος · Teamwork

    Tell me about a time you had a significant disagreement with a colleague or team member. How did you approach the situation and what was the outcome?
  3. + 8 more questions in this round (sign up to unlock)

Unlock the full Valiuz question bank

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Interview tracks at Valiuz

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

SWEs are assessed on building scalable data pipelines, robust ad delivery systems, and efficient data processing algorithms. Strong CS fundamentals, experience with big data technologies, and practical problem-solving in high-throughput ad tech are key.

System Design

Design a data pipeline to aggregate ad performance metrics (impressions, clicks, conversions) from various sources into a data warehouse for reporting. Discuss data ingestion, transformation, and storage.

Technical Decision Making

Tell me about a technically challenging decision you had to make on a project. What were the options, what factors did you consider, and why did you choose the path you did?

+ 1 more

Unlock the Software Engineer grading rubric for Valiuz

See full Software Engineer guide

Compare Valiuz with similar employers

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