Type · Algorithmic
Implement a function to simulate the execution of a simplified graph computation on a multi-core processor, considering data dependencies and potential deadlocks. Optimize for parallel execution.
How to Pass the Graphcore Software Engineer Interview in 2026
The Graphcore DNA (TL;DR)
The technical deep-dive rounds at Graphcore heavily assess a candidate's depth in their domain, specifically around novel approaches to AI compute. Interviewers, often senior engineers, probe for original thinking and how one would contribute to the evolution of IPU technology, reflecting the vision of Nigel Toon and Simon Knowles.
The Graphcore 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, debugging, 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 Graphcore interview outcomes, avoid these common traps:
- Using overly simplistic prediction models that don't capture temporal locality.
- Failing to handle degenerate matrix cases gracefully.
- Proposing a centralized system that cannot scale to the volume of data.
- Not demonstrating initiative or a proactive approach to problem-solving.
Test Yourself: Real Graphcore Questions
Three real prompts pulled from our database.
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 build credibility and influence them?
Type · Code Clarity
Refactor the following snippet of code, which implements a basic parallel reduction operation, to improve its clarity, efficiency, and thread safety for use in a multi-threaded IPU environment.
+ many more questions, signals, and worked examples
Sign up to unlock the full Graphcore grading rubric
Graphcore Interview Question Bank
A sample from our database, grouped by round. Sign up to see the full set.
10 of 21 questions shown
1
Recruiter Screen
2- 1
Type · Motivation
What specifically interests you about Graphcore's approach to AI hardware and the challenges of developing IPUs? - 2
Type · Logistics
Describe your experience with C++ and Python, and how you've used them in previous roles, particularly in performance-critical applications.
2
Coding Screen
3- 3
Type · Algorithmic
Given a large dataset of processor performance counters for IPU operations, write a function to efficiently find the top K most frequent counter patterns. Assume the dataset is too large to fit into memory. - 4
Type · Algorithmic
You are given a stream of data representing memory access requests to different tiles on an IPU. Design an algorithm to predict the next likely memory access based on recent access patterns, optimizing for cache hit rate. - + 1 more questions in this round (sign up to unlock)
3
System Design
3- 5
Type · Distributed Systems
Design a distributed system for managing and scheduling large-scale AI model training jobs across a cluster of Graphcore IPUs. Consider fault tolerance, load balancing, and efficient resource utilization. - 6
Type · Architecture
How would you design a system to collect and analyze telemetry data from thousands of IPUs in real-time to detect performance anomalies or potential hardware issues? Discuss the trade-offs between data granularity, storage, and processing latency. - + 1 more questions in this round (sign up to unlock)
4
Onsite Coding
3- 7
Type · Debugging
A customer reports intermittent incorrect results from a deep learning model running on our IPUs. The issue only appears under specific input data conditions and at high utilization. How would you approach debugging this problem? - 8
Type · Edge Cases
Write a function to perform matrix multiplication on the IPU, considering potential numerical precision issues and edge cases like matrices with zero dimensions or non-standard data types. - + 1 more questions in this round (sign up to unlock)
5
Behavioral / Leadership
10- 9
Type · Past Experience
Tell me about a time you had to influence a team or stakeholders who were resistant to your product idea or direction. What was the situation, what steps did you take, and what was the outcome? - 10
Type · Ownership & Initiative
Tell me about a time you took initiative to solve a problem or improve a process that was outside your direct responsibilities. What was the situation, what did you do, and what was the result? - + 8 more questions in this round (sign up to unlock)
Unlock all 21 Graphcore 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 Graphcore
How Graphcore's DNA translates across functions. Pick your role.
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Practice Graphcore interviews end-to-end
Graphcore Mock Interview
Run a live mock interview with our AI interviewer using Graphcore-style prompts. Get scored on structure, signal, and answer length - exactly how the real loop grades you.
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STAR Stories for Graphcore Behavioral Rounds
Build a Story Bank of your past wins, mapped to the leadership signals Graphcore interviewers grade on. Reuse them across every behavioral round.
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Graphcore Interview Prep Hub
The frameworks behind every Graphcore 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 Graphcore 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 Graphcore interview questions shows.
Implement a function to simulate the execution of a simplified graph computation on a multi-core processor, considering data dependencies and potential deadlocks. Optimize for parallel execution.
A strong answer shows: Understanding of parallel programming concepts.; Ability to model and manage dependencies in concurrent systems..
Describe a situation where you had to persuade a skeptical colleague or stakeholder to adopt your point of view or approach. How did you build credibility and influence them?
A strong answer shows: Persuasion skills; Communication; Negotiation; Interpersonal skills; Credibility building.
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