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Growth · Software Engineer Interview Guide

Applies via Ashby

How to Pass the Griffin Software Engineer Interview in 2026

The Griffin DNA (TL;DR)

Griffin values candidates who demonstrate a deep understanding of regulated financial environments, robust problem-solving skills, and a collaborative approach to building secure, compliant banking infrastructure. They seek individuals who prioritize reliability and customer trust and can navigate complex regulatory landscapes.

The Griffin 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, debugging, 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 Griffin interview outcomes, avoid these common traps:

  • Inefficiently calling `getCurrentMarketPrice` multiple times for the same stock symbol.
  • Ignoring potential floating-point precision issues with currency calculations.
  • Choosing a simple bug that was easily fixed.
  • Proposing batch processing instead of real-time detection for fraud.

Test Yourself: Real Griffin Questions

Three real prompts pulled from our database.

Type · Conflict Resolution

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

Type · Algorithmic

You are given a list of user account balances, where each balance can be positive or negative. Find the maximum sum of a contiguous sublist of balances. This is a variation of Kadane's algorithm.

Type · Influence

Describe a situation where you had to persuade a skeptical colleague or stakeholder to adopt your point of view or approach. How did you gain their buy-in?

+ many more questions, signals, and worked examples

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Griffin 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

    Type · Motivation

    What interests you specifically about working at Griffin, a fintech company focused on growth, compared to other tech companies?
2

Coding Screen

3
  1. 2

    Type · Algorithmic

    Given a stream of financial transactions (each with a timestamp, amount, and user ID), design a system to calculate the real-time average transaction amount per user over the last 5 minutes. Assume transactions arrive out of order.
  2. 3

    Type · Algorithmic

    You are given a list of user account balances, where each balance can be positive or negative. Find the maximum sum of a contiguous sublist of balances. This is a variation of Kadane's algorithm.
  3. + 1 more questions in this round (sign up to unlock)
3

System Design

4
  1. 4

    Type · System Design

    Design a rate limiter for API requests to Griffin's core banking services. Consider different strategies (token bucket, leaky bucket, fixed window, sliding window log) and discuss trade-offs in terms of accuracy, memory usage, and complexity, especially for a high-throughput fintech environment.
  2. 5

    Type · System Design

    Design a system to detect potentially fraudulent transactions in real-time for a large user base. Discuss data sources, processing pipeline, detection algorithms, and how to minimize false positives/negatives.
  3. + 2 more questions in this round (sign up to unlock)
4

Onsite Coding

4
  1. 6

    Type · Coding

    Write a function that takes a list of stock trades (symbol, price, quantity, timestamp) and returns the total profit or loss for a given stock symbol, assuming a FIFO (First-In, First-Out) inventory accounting method. Handle edge cases like insufficient shares to cover a sale.
  2. 7

    Type · Coding

    Given a nested data structure representing a user's financial portfolio (e.g., {'stocks': [{'symbol': 'AAPL', 'shares': 10, 'purchase_price': 150}, ...], 'bonds': [...]}), write a function to calculate the total current market value, assuming you have a separate function `getCurrentMarketPrice(symbol)` available.
  3. + 2 more questions in this round (sign up to unlock)
5

Behavioral / Leadership

8
  1. 8

    Type · Conflict Resolution

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

    Type · conflict-resolution

    Tell me about a time you had a significant disagreement with a colleague or stakeholder regarding a technical decision. How did you approach the situation, and what was the outcome?
  3. + 6 more questions in this round (sign up to unlock)

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Interview tracks at Griffin

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

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