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Growth · Software Engineer Interview Guide

How to Pass the Starling Bank Software Engineer Interview in 2026

Το DNA της Starling Bank (TL;DR)

Starling Bank values candidates who demonstrate strong problem-solving skills, a deep understanding of financial services, and a customer-centric approach. They seek individuals who thrive in a regulated, fast-paced fintech environment and can contribute to innovative digital banking solutions.

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 Starling Bank

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 Starling Bank, αποφύγετε αυτές τις συνηθισμένες παγίδες:

  • Failing to mention specific actions taken or lessons learned.
  • Using a simple dictionary/hash map without considering concurrency issues, leading to race conditions.
  • Giving a generic answer about wanting to work in tech.
  • Choosing a problem that was too trivial or easily solved.

Δοκιμάστε τον εαυτό σας: Πραγματικές ερωτήσεις Starling Bank

Τρία πραγματικά prompts τραβηγμένα από τη βάση δεδομένων μας.

Τύπος · Data Structures

Implement a data structure that can efficiently store and retrieve customer account balances, supporting operations like `deposit(account_id, amount)`, `withdraw(account_id, amount)`, and `getBalance(account_id)`. Ensure thread safety for concurrent operations.

Τύπος · Debugging

Here is a piece of code that is supposed to calculate the average transaction value per customer, but it's producing incorrect results for some edge cases. Debug and fix the code.

Τύπος · Motivation

What interests you specifically about working at a fintech company like Starling Bank, and how do you see your skills contributing to our mission of revolutionizing banking?

+ πολλές ακόμη ερωτήσεις, σήματα και επεξεργασμένα παραδείγματα

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Starling Bank Interview Question Bank

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

9 of 16 questions shown

1

Recruiter Screen

1
  1. 1

    Τύπος · Motivation

    What interests you specifically about working at a fintech company like Starling Bank, and how do you see your skills contributing to our mission of revolutionizing banking?
2

Coding Screen

3
  1. 2

    Τύπος · Algorithmic

    Given a list of financial transactions, each with a timestamp and an amount, write a function to calculate the running balance for each transaction. Assume the initial balance is 0.
  2. 3

    Τύπος · Data Structures

    Implement a data structure that can efficiently store and retrieve customer account balances, supporting operations like `deposit(account_id, amount)`, `withdraw(account_id, amount)`, and `getBalance(account_id)`. Ensure thread safety for concurrent operations.
  3. + 1 more questions in this round (sign up to unlock)
3

System Design

3
  1. 4

    Τύπος · System Design

    Design a system to detect potentially fraudulent transactions in real-time for Starling Bank. Consider the scale of millions of transactions per day and the need for low latency.
  2. 5

    Τύπος · System Design

    How would you design a system to handle payment processing for Starling Bank, ensuring high availability and fault tolerance? Discuss the interaction with external payment networks.
  3. + 1 more questions in this round (sign up to unlock)
4

Onsite Coding

3
  1. 6

    Τύπος · Debugging

    Here is a piece of code that is supposed to calculate the average transaction value per customer, but it's producing incorrect results for some edge cases. Debug and fix the code.
  2. 7

    Τύπος · Algorithmic

    Implement a function to determine if a given string representing a sequence of bank account operations (e.g., 'deposit(100)', 'withdraw(50)', 'deposit(200)') is valid according to a set of predefined rules (e.g., no overdrafts allowed, specific format).
  3. + 1 more questions in this round (sign up to unlock)
5

Behavioral / Leadership

6
  1. 8

    Τύπος · Conflict Resolution

    Tell me about a time you had a significant disagreement with a cross-functional team member (e.g., engineer, designer, marketing) about a product decision. How did you approach it, and what was the outcome?
  2. 9

    Τύπος · Behavioral

    Tell me about a time you had to work with a difficult stakeholder or team member. How did you approach the situation, and what was the outcome?
  3. + 4 more questions in this round (sign up to unlock)

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Interview tracks at Starling Bank

How Starling Bank's DNA translates across functions. Pick your role.

SWEs face technical challenges focusing on secure, scalable, and resilient systems crucial for banking. Expect coding assessments, system design for high-throughput financial transactions, and discussions on microservices architecture and cloud platforms (AWS). Knowledge of Java and data integrity is key.

Data Structures

Implement a data structure that can efficiently store and retrieve customer account balances, supporting operations like `deposit(account_id, amount)`, `withdraw(account_id, amount)`, and `getBalance(account_id)`. Ensure thread safety for concurrent operations.

Debugging

Here is a piece of code that is supposed to calculate the average transaction value per customer, but it's producing incorrect results for some edge cases. Debug and fix the code.

+ 1 more

Unlock the Software Engineer grading rubric for Starling Bank

See full Software Engineer guide

Compare Starling Bank 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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