Cal Paterson
Contract Software Engineer at csvbase
Espoo, Finland
Summary
🤩
Rockstar🎓
Top SchoolCal Paterson is a senior software engineer and entrepreneur with 14 years’ experience building backend systems across government, investment banks and startups, now running his own company, csvbase, from Espoo, Finland. He specializes in database and messaging code and brings practical DevOps and CI/CD experience from financial firms like J.P. Morgan, Citi and BAML where he improved test and delivery practices for front-office systems. Comfortable with Python as his primary tool and conversant in JavaScript, he has a track record of short-term contracts delivering high-impact, production-facing features and automation. An attention to quality shows in his open-source testing work for sklearn-pandas, where he added robust tests and bug fixes to improve Python 3 compatibility. He combines methodical, test-driven engineering with a pragmatic owner’s mindset and a willingness to dive into obscure legacy stacks when needed.
14 years of coding experience
10 years of employment as a software developer
BSc Computer Science, BSc Computer Science at Prifysgol Aberystwyth University
Stackoverflow
172reputation
7kreached
1answer
5questions
Github Skills (15)
testing10
scikit-learn10
pandas10
pytest10
python10
test-automation10
scikit10
data-science8
machine-learning7
cartopy6
java6
antlr6
gis6
numpy6
matplotlib6
Programming languages (9)
Github contributions (5)
scikit-learn-contrib/sklearn-pandas
Jan 2015 - Aug 2015
Pandas integration with sklearn
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:1 release, 19 commits, 10 PRs in 6 months
Contributions summary:Cal primarily focused on enhancing the testing capabilities of the sklearn-pandas library. They added new tests, including a failing test, high-level tests using the iris dataset, and a test with unicode data to improve Python 3 compatibility. Furthermore, the user corrected a bug and ensured tests were correctly exercising the System Under Test (SUT), contributing significantly to the reliability and robustness of the library. Additionally, they addressed a typo and fixed a trailing tab, indicating a focus on code quality and documentation accuracy.
pandassklearn
calpaterson/emacs24
Jan 2015 - Oct 2025
Contributions:55 pushes in 10 years 11 months
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