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How to Pass the Galp Software Engineer Interview in 2026

Enterprise · Software Engineer Interview Guide

Sign up to see ATSHeadquartered in Portugal

Interview language: English

Expect to code inPythonSQL

The Galp DNA (TL;DR)

Galp's energy transition roadmap requires candidates who quantify operational trade-offs across downstream retail products like Tus Tarjetas Mundo Galp. Interviewers measure whether candidates explicitly name rejected alternatives when evaluating capital allocation projects.

The Galp 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 problems, reasoning about defects, 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 Galp interview outcomes, avoid these common traps:

  • Not considering data volume, velocity, and variety.
  • Focusing on winning the argument rather than the business outcome
  • Ignoring the need for both batch and real-time processing.
  • Choosing a monolithic architecture instead of a scalable, distributed one.

Test Yourself: Real Galp Questions

Three real prompts pulled from our database.

Type · algorithmic

Design a system to predict the peak demand for electricity in a region based on historical data, weather forecasts, and special events (e.g., holidays, major sporting events). Implement a function that calculates the predicted demand for a given time.

Type · problem-solving

Tell me about a time you encountered a particularly challenging technical problem in a past project. What was the problem, how did you approach it, and what was the outcome?

Type · architecture

Design a data pipeline to process and analyze sensor data from electric vehicle charging stations to optimize charging schedules and identify potential maintenance issues.

+ many more questions, signals, and worked examples

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Galp Interview Question Bank

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

9 of 12 questions shown

1

Recruiter Screen

1
  1. 1

    Type · motivation

    What interests you specifically about working in the energy sector at Galp, and how do you see your software engineering skills contributing to our mission of energy transition?
2

Coding Screen

3
  1. 2

    Type · algorithmic

    Given a list of energy consumption readings from various smart meters in a city over a day, write a function to find the top K most energy-intensive hours, considering that readings might be missing or duplicated.
  2. 3

    Type · algorithmic

    Design a system to predict the peak demand for electricity in a region based on historical data, weather forecasts, and special events (e.g., holidays, major sporting events). Implement a function that calculates the predicted demand for a given time.
  3. + 1 more questions in this round (sign up to unlock)
3

System Design

3
  1. 4

    Type · architecture

    Design a real-time monitoring system for Galp's distributed solar power generation assets. The system should handle data from thousands of solar panels, detect anomalies, and alert operators.
  2. 5

    Type · architecture

    Design a data pipeline to process and analyze sensor data from electric vehicle charging stations to optimize charging schedules and identify potential maintenance issues.
  3. + 1 more questions in this round (sign up to unlock)
4

Onsite Coding

2
  1. 6

    Type · algorithmic

    Implement a function to simulate the flow of natural gas through a network of pipelines. The function should calculate pressure drops and flow rates, considering different pipe diameters, lengths, and gas properties. Optimize for performance when simulating large networks.
  2. 7

    Type · edge-cases

    Write a function that takes a list of historical electricity prices and predicts the price for the next hour. Consider potential edge cases such as sudden market shocks, data irregularities, or periods of extremely low trading volume.
5

Behavioral / Leadership

3
  1. 8

    Type · problem-solving

    Tell me about a time you encountered a particularly challenging technical problem in a past project. What was the problem, how did you approach it, and what was the outcome?
  2. 9

    Type · collaboration

    At Galp, we often balance immediate operational stability in our EV charging networks with the need for rapid feature deployment. Tell me about a time you and a team member had conflicting views on whether to prioritize technical debt reduction or a new customer-facing release. How did you align the technical trade-offs with our business objectives?
  3. + 1 more questions in this round (sign up to unlock)

Unlock all 12 Galp questions, free

No credit card. Every question with its framework, the grading signals interviewers score against, and a worked answer for each.

Unlock all 12 Galp questions

Interview tracks at Galp

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

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

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Practice Galp interviews end-to-end

Galp Mock Interview

Run a live mock interview with our AI interviewer using Galp-style prompts. Get scored on structure, signal, and answer length - exactly how the real loop grades you.

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STAR Stories for Galp Behavioral Rounds

Build a Story Bank of your past wins, mapped to the leadership signals Galp interviewers grade on. Reuse them across every behavioral round.

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Galp Interview Prep Hub

The frameworks behind every Galp round: CIRCLES for product sense, hypothesis-driven debugging for analytical, STAR for behavioral. Learn each one in 10 minutes.

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Interview Frameworks

CIRCLES, STAR, AARRR, RICE, MECE. The exact frameworks that make Galp interviewers nod instead of frown. Step-by-step playbooks with the moves and the pitfalls.

Open

Sample answers

What a strong answer to these Galp interview questions shows.

Design a system to predict the peak demand for electricity in a region based on historical data, weather forecasts, and special events (e.g., holidays, major sporting events). Implement a function that calculates the predicted demand for a given time.

A strong answer shows: Considers multiple factors for prediction (historical, weather, events).; Appropriate data structures and algorithms for time-series data.; Clear logic for combining different data inputs..

Tell me about a time you encountered a particularly challenging technical problem in a past project. What was the problem, how did you approach it, and what was the outcome?

A strong answer shows: Describes a complex and non-trivial technical challenge.; Clearly explains their thought process and actions taken.; Demonstrates ownership and persistence.; Articulates the lessons learned or positive outcomes..

Frequently asked questions

How long does the Galp 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 Galp?

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 Galp?

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.

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