Type · Motivation
What interests you specifically about working at Griffin, a fintech company focused on growth, compared to other tech companies?
How to Pass the Griffin Software Engineer Interview in 2026
Growth · Software Engineer Interview Guide
Sign up to see ATSHeadquartered in United KingdomInterview language: English
The Griffin DNA (TL;DR)
Griffin's 'Thoughtfulness' value manifests in architecture discussions around ledger integrity and BaaS API design. Interviewers grade candidates on how explicitly they detail balance-sheet consistency and compliance trade-offs against developer ergonomics.
The Griffin Interview Loop
Your onsite loop will typically consist of 5 rounds.
- 1
Round 1
Recruiter ScreenMotivation, role fit, logistics. - 2
Round 2
Coding ScreenLeetCode-medium algorithmic problems under time pressure. - 3
Round 3
System DesignDistributed systems, trade-offs at scale, architecture under constraints. - 4
Round 4
Onsite CodingLeetCode-hard problems, reasoning about defects, code clarity, edge cases. - 5
Round 5
Behavioral / LeadershipPast 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:
- Not handling out-of-order arrivals efficiently, leading to potential reprocessing or incorrect averages.
- Proposing manual reconciliation processes for large volumes of data.
- Using overly complex parsing logic instead of a state machine or regular expressions.
- Inefficiently storing or querying historical transaction data, leading to high memory or CPU usage.
Test Yourself: Real Griffin Questions
Three real prompts pulled from our database.
Type · Behavioral
Describe a complex bug you encountered in a financial system. Walk me through your process of identifying, debugging, and resolving it. What made it particularly challenging?
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.
+ 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 14 questions shown
1
Recruiter Screen
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- 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. - 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. - + 1 more questions in this round (sign up to unlock)
3
System Design
4- 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. - 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. - + 2 more questions in this round (sign up to unlock)
4
Onsite Coding
3- 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. - 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. - + 1 more questions in this round (sign up to unlock)
5
Behavioral / Leadership
3- 8
Type · Behavioral
Tell me about a time you had to make a significant technical decision with incomplete information. How did you approach it, what was the outcome, and what did you learn? - 9
Type · Behavioral
Describe a complex bug you encountered in a financial system. Walk me through your process of identifying, debugging, and resolving it. What made it particularly challenging? - + 1 more questions in this round (sign up to unlock)
Unlock all 14 Griffin questions, free
No credit card. Every question with its framework, the grading signals interviewers score against, and a worked answer for each.
Interview tracks at Griffin
How Griffin's DNA translates across functions. Pick your role.
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Practice Griffin interviews end-to-end
Griffin Mock Interview
Run a live mock interview with our AI interviewer using Griffin-style prompts. Get scored on structure, signal, and answer length - exactly how the real loop grades you.
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STAR Stories for Griffin Behavioral Rounds
Build a Story Bank of your past wins, mapped to the leadership signals Griffin interviewers grade on. Reuse them across every behavioral round.
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Griffin Interview Prep Hub
The frameworks behind every Griffin 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 Griffin interviewers nod instead of frown. Step-by-step playbooks with the moves and the pitfalls.
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Sample answers
What a strong answer to these Griffin interview questions shows.
What interests you specifically about working at Griffin, a fintech company focused on growth, compared to other tech companies?
A strong answer shows: Genuine interest in fintech and its impact.; Understanding of Griffin's business model and growth focus.; Alignment with company values and mission..
Describe a complex bug you encountered in a financial system. Walk me through your process of identifying, debugging, and resolving it. What made it particularly challenging?
A strong answer shows: Systematic debugging skills.; Deep understanding of the system's domain (fintech).; Problem-solving abilities.; Resilience and persistence in the face of difficult technical challenges..
Frequently asked questions
How long does the Griffin 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 Griffin?
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 Griffin?
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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