Software QA in Bristol

Overview

Graphcore is one of the world’s leading innovators in Artificial Intelligence compute. It develops hardware, software and systems infrastructure to unlock the next generation of AI breakthroughs and power widespread adoption of AI solutions across every industry. As part of the SoftBank Group, Graphcore is a member of an elite family of companies responsible for transformative technologies. The goal is to enable Artificial Super Intelligence and make its benefits accessible to everyone. Graphcore’s teams are drawn from diverse backgrounds and bring a broad range of skills and perspectives, including AI research specialists, silicon designers, software engineers and systems architects. The culture emphasizes continuous learning and constant innovation.

Job Summary

As a Software Engineer in Test you will be responsible for safeguarding the correctness, reliability, and performance of numerical libraries. You’ll design and own end-to-end test strategies across native C++ components and validate low-level kernels.

The Team

This role is an opportunity to join an expanding Kernel Engineering team responsible for delivering high-performance compute libraries to help customers gain the maximum performance from AI hardware.

Responsibilities And Duties

• Own existing tests coverage and contribute towards improving it
• Improve correctness of existing microbenchmarks, regression tests, and validation techniques
• Mentor colleagues within the team, sharing knowledge and providing guidance where appropriate
• Actively engage in and support Agile ways of working within the team
• Debug issues, resolve bugs and generally improve the quality and functionality of the product

Candidate Profile

Essential

• Strong C++ and Python coding skills and solid Linux fundamentals
• Experience testing numerical/performance-sensitive code
• Understanding of processor architectures and profiling on Linux
• Hands-on with reproducibility/determinism, tolerance design, and benchmarking
• Excellent written and oral communication skills, good work ethics, strong teamwork

• Desirable

• Experience benchmarking and optimising algorithmic performance with a deep understanding of memory hierarchy (cache/NUMA), multithreading (synchronisation, work partitioning)
• Experience testing mixed-precision policies (FP32/BF16/FP16/FP8) and stochastic rounding
• Property-based testing with tensor-shape/dtype/layout generators
• Experience testing HPC kernels, ML runtimes/kernels, or similar
• ABI/API stability and packaging for Linux distros, manylinux, wheels
• Hands-on testing for ML frameworks – custom operators/extensions, seeds/determinism, and debugging dispatcher issues

Benefits

In addition to a competitive salary, Graphcore offers flexible working, a generous annual leave policy, private medical insurance and health cash plan, 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 (health, mental wellbeing, and bereavement support). We offer healthy food and snacks at our Bristol office and have a barista bar. We are committed to an inclusive work environment and an equal opportunity process, with flexible interview arrangements and adjustments on request.

Applicants for this position must hold the right to work in the UK. Visa sponsorship or visa applications support is not available at this time.

Seniority level

• Entry level

Employment type

• Full-time

Job function

• Engineering and Information Technology

Industries

• Semiconductor Manufacturing

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Bristol, England, United Kingdom