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Growth · Software Engineer Interview Guide

How to Pass the OakNorth Software Engineer Interview in 2026

Το DNA της OakNorth (TL;DR)

OakNorth values candidates demonstrating strong analytical skills, deep fintech understanding, problem-solving abilities, and a proactive, results-oriented mindset. They seek individuals who can contribute to empowering entrepreneurs through innovative lending 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 OakNorth

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 OakNorth, αποφύγετε αυτές τις συνηθισμένες παγίδες:

  • Ignoring security considerations like authentication and authorization.
  • Focusing only on the other person's flaws
  • Not implementing caching strategies where appropriate.
  • Not considering the scalability of the matching algorithm as the number of applications and models grows.

Δοκιμάστε τον εαυτό σας: Πραγματικές ερωτήσεις OakNorth

Τρία πραγματικά prompts τραβηγμένα από τη βάση δεδομένων μας.

Τύπος · Motivation

What interests you specifically about working at OakNorth, and how do you see your skills contributing to our mission of helping growing businesses succeed?

Τύπος · Resilience

Tell me about a time you faced a significant setback or failure in a project or task. How did you handle it, and what did you learn from the experience?

Τύπος · Algorithms

OakNorth's platform analyzes financial statements. Implement a function to detect anomalies in a sequence of monthly revenue figures, where an anomaly is defined as a month where revenue deviates by more than 2 standard deviations from the rolling 12-month average. Handle cases with insufficient data.

+ πολλές ακόμη ερωτήσεις, σήματα και επεξεργασμένα παραδείγματα

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OakNorth 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 specifically about working at OakNorth, and how do you see your skills contributing to our mission of helping growing businesses succeed?
2

Coding Screen

3
  1. 2

    Τύπος · Data Structures

    Given a stream of loan application data, implement a function to efficiently calculate the average loan amount for applications submitted within the last 24 hours. Assume timestamps are Unix epoch seconds.
  2. 3

    Τύπος · Algorithms

    OakNorth's platform analyzes financial statements. Implement a function to detect anomalies in a sequence of monthly revenue figures, where an anomaly is defined as a month where revenue deviates by more than 2 standard deviations from the rolling 12-month average. Handle cases with insufficient data.
  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 service that allows banks to query OakNorth's credit analysis engine for specific businesses. Consider authentication, rate limiting, request/response formats, and error handling.
  2. 5

    Τύπος · Scalability

    OakNorth's loan origination platform needs to handle a significant increase in concurrent users during peak business hours. How would you design the system to ensure high availability and low latency for critical operations like loan application submission and status checks?
  3. + 1 more questions in this round (sign up to unlock)
4

Onsite Coding

3
  1. 6

    Τύπος · Debugging

    A customer reports intermittent errors when trying to upload financial documents through our portal. The logs show occasional `500 Internal Server Error` responses, but the error is not consistently reproducible. How would you approach debugging this issue?
  2. 7

    Τύπος · Algorithm (Hard)

    OakNorth's risk team needs to identify businesses that have experienced a significant, sudden drop in revenue followed by a partial recovery within a 3-month period. Given a time series of daily revenue data for multiple businesses, write a function to detect such patterns. Define 'significant drop' and 'partial recovery' clearly.
  3. + 1 more questions in this round (sign up to unlock)
5

Behavioral / Leadership

9
  1. 8

    Τύπος · Past Experience

    Tell me about a time you had to influence a senior stakeholder or a cross-functional team to adopt your product vision or strategy. What was the situation, what did you do, and what was the outcome?
  2. 9

    Τύπος · Conflict Resolution

    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 resolution?
  3. + 7 more questions in this round (sign up to unlock)

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Interview tracks at OakNorth

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

SWEs should excel in system design, data structures, algorithms, and demonstrate practical experience in building robust, scalable, and secure financial systems. Familiarity with cloud platforms (AWS), microservices, and modern backend technologies is crucial for their core banking platform.

Motivation

What interests you specifically about working at OakNorth, and how do you see your skills contributing to our mission of helping growing businesses succeed?

Resilience

Tell me about a time you faced a significant setback or failure in a project or task. How did you handle it, and what did you learn from the experience?

+ 1 more

Unlock the Software Engineer grading rubric for OakNorth

See full Software Engineer guide

Compare OakNorth 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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