Sitsofe Wheeler
Senior Staff Engineer at Graphcore
Bristol, England, United Kingdom
Summary
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Rockstar🎓
Top SchoolSitsofe Wheeler is a Senior Staff Engineer based in Bristol with 26 years of hands-on experience in test automation, Linux administration, and cloud infrastructure. She has progressed from test engineer to senior infrastructure and automation roles at companies including Graphcore, StorMagic, YellowDog and Ocean Blue Software, blending deep QA discipline with systems-level engineering. Sitsofe is a pragmatic problem-solver known for hardening complex C and systems code—her open-source work includes improving testing and stability in projects like libiscsi and the widely used fio I/O tester. She focuses on cross-platform robustness, fixing platform-specific quirks and edge cases that often evade standard test suites. Comfortable in both hands-on debugging and shaping automation strategy, she brings rare longevity and institutional memory to rapidly evolving infrastructure teams. Her background in software engineering (MSc, University of York) underpins a methodical, reliability-first approach to shipping resilient systems.
26 years of coding experience
11 years of employment as a software developer
Bachelor's degree Computer Science, Bachelor's degree Computer Science at Swansea University / Prifysgol AbertaweMaster of Science - MS Software Engineering, Master of Science - MS Software Engineering at University of York
Stackoverflow
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0reached
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Github Skills (9)
c1710
performance-testing10
system-programming10
c1110
testing10
test-automation9
linux9
unit-testing9
networking8
Programming languages (17)
Github contributions (5)
axboe/fio
Sep 2013 - Dec 2021
Flexible I/O Tester
Role in this project:
Back-end Developer & System Engineer
Back-end Developer & System EngineerContributions:161 reviews, 208 commits, 102 PRs in 8 years 3 months
Contributions summary:Sitsofe primarily contributed to the Fio (Flexible I/O Tester) project by fixing bugs, addressing integer overflow issues, and improving code maintainability. They also refactored code and added support for features like the `serialize_overlap` option. Their work encompassed improvements to the core functionality, performance, and stability of the I/O testing tool. Additionally, the user made modifications to the server and networking aspects of the project.
testingflexible
sahlberg/libiscsi
Aug 2013 - Jun 2016
iscsi client library and utilities
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:26 commits, 7 PRs, 57 comments in 2 years 9 months
Contributions summary:Sitsofe primarily focused on improving the testing framework of the `libiscsi` library. Their contributions involved fixing and enhancing existing test cases, including those for the `COMPAREANDWRITE`, `READ6`, and `WRITESAME` commands. They addressed compilation issues and platform-specific quirks to ensure tests run correctly across different operating systems. The user's work included addressing edge cases and ensuring the tests cover the library's functionality thoroughly.
iscsi
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