At Graphcore, we’re building the future of AI compute.
We’re a team of semiconductor, software and AI experts, with deep experience in creating the complete AI compute stack - from silicon and software to infrastructure at datacenter scale.
As part of the SoftBank Group, backed by significant long-term investment, we are delivering key technology into the fast-growing SoftBank AI ecosystem.
To meet the vast and exciting AI opportunity, Graphcore is expanding its teams around the world.
We are bringing together the brightest minds to solve the toughest problems, in a place where everyone has the opportunity to make an impact on the company, our products and the future of artificial intelligence.
Job Summary
As a Software Engineer, you will be responsible for development of new and support existing kernels for linear algebra operations on a new generation of AI hardware.
The Team
This is an exciting opportunity to join an expanding team at Graphcore. The ML Kernels & Runtime team is responsible for delivering high performance compute library to help customers gain the maximum performance from AI hardware.
Responsibilities and Duties
- Implement kernels for linear algebra and tensor ops (GEMM, batched GEMM, convolutions, reductions, elementwise and fused operations) in C++
- Contribute towards performance and correctness - add microbenchmarks, regression tests, numerics validation
- Profile and optimise across for next generation of AI hardware - threading, cache locality, memory layout, and kernel launch efficiency.
- Debug issues, resolve bugs and generally improve the quality and functionality of the product
- Actively engage in and support Agile ways of working within the team
Candidate Profile
Essential
- Excellent programming and scripting skills using C++ and Python
- You thrive on solving challenging problems with creativity, think outside the box, and see the bigger picture beyond the specific software component you are working on.
- Possess excellent written and oral communication skills, good work ethics, high sense of team-work
- Love to produce quality work and be a team player
Desirable
- Strong understanding of processor architectures
- Experience or solid understanding of algorithmic performance - vectorisation, memory hierarchy, threading, lock-free patterns, and profiling on Linux
- Knowledge of at least one BLAS/DNN stack and able to read/extend kernels
- Awareness about CPU micro-optimisations and numerical stability/trade-offs across FP32/FP16/BF16
In addition to a competitive salary, Graphcore offers flexible working, a generous annual leave policy, private medical insurance, a dental plan, pension (matched up to 5%), life assurance and income protection. We have a generous parental leave policy and an employee assistance programme (which includes health, mental wellbeing, and bereavement support). We offer a range of healthy food and snacks at our central Bristol office and have our own barista bar! We welcome people of different backgrounds and experiences; we’re committed to building an inclusive work environment that makes Graphcore a great home for everyone. We offer an equal opportunity process and understand that there are visible and invisible differences in all of us. We can provide a flexible approach to interview and encourage you to chat to us if you require any reasonable adjustments.
Applicants for this position must hold the right to work in the UK. Unfortunately at this time, we are unable to provide visa sponsorship or support for visa applications.
Skills Required
- Excellent programming and scripting skills using C++ and Python
- Strong understanding of processor architectures
- Experience or solid understanding of algorithmic performance
- Hands-on with at least one BLAS/DNN stack
- Experience integrating native code into PyTorch or similar
- Comfort with CPU micro-optimisations
- ABI/API stability and packaging for Linux distros
What the Team is Saying
Graphcore Compensation & Benefits Highlights
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Healthcare Strength — Health coverage includes medical and dental insurance, with US plans through Cigna and Kaiser, HDHP options with employer‑funded HSA contributions, a health cash plan, EAP access, and dedicated mental‑health support. These provisions extend to family options in some regions, reinforcing broad medical and wellbeing support.
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Retirement Support — Retirement programs include a UK pension match up to 5% and a US 401(k) with a 100% company match up to 6% (with a true‑up). This pairing signals strong, predictable long‑term savings support across key locations.
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Leave & Time Off Breadth — Time‑off policies feature “unlimited” holiday in the UK and flexible, generous PTO with paid US holidays. Paid family leave for birthing parents and bonding further broadens time‑away support.
Graphcore Insights
What We Do
At Graphcore, we’re building the future of AI compute. We’re a team of semiconductor, software and AI experts, with deep experience in creating the complete AI compute stack - from silicon and software to infrastructure at datacenter scale. As part of the SoftBank Group, backed by significant long-term investment, we are delivering key technology into the fast-growing SoftBank AI ecosystem. To meet the vast and exciting AI opportunity, Graphcore is expanding its teams around the world. We are bringing together the brightest minds to solve the toughest problems, in a place where everyone has the opportunity to make an impact on the company, our products and the future of artificial intelligence.
Why Work With Us
Our team is at the forefront of the machine intelligence revolution, enabling innovators from all industries to build AI-native products to expand human potential. What we do at Graphcore really makes a difference.
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Graphcore Offices
Hybrid Workspace
Employees engage in a combination of remote and on-site work.
At Graphcore, we value wellbeing and flexibility to support a healthy work/life balance. Our hybrid approach encourages office-based colleagues to work onsite three days a week, with trusted flexibility built on trust and transparency for everyone.
