Jonas Arnfred
Chief Technology Officer at Gower Street Analytics
Sheffield, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolJonas Arnfred is a seasoned technology leader and Chief Technology Officer with 14 years of experience building data-driven products and teams, currently steering engineering at Gower Street Analytics to help major studios forecast global theatrical markets. He progressed from hands-on software engineering and team leadership into his current CTO role, pairing product-focused architecture with pragmatic delivery practices honed at Amazon where he led scalable BI and recommendation projects. With an academic foundation from EPFL and early research in computer vision, Jonas blends rigorous technical depth with commercial intuition—he even took a food-product from idea to retail briefly, which speaks to his operational curiosity and willingness to experiment outside tech. An active contributor to open-source data-visualization tooling (notably enhancements to the plotnine Grammar of Graphics library), he brings both statistical sensibility and practical engineering to analytics-driven decision making. Based in Sheffield, he excels at translating complex data needs into reliable systems and clear stakeholder outcomes.
14 years of coding experience
10 years of employment as a software developer
Master's Degree Computer Science, Master's Degree Computer Science at EPFL
English, French, Spanish, Danish
Stackoverflow
7reputation
379reached
0answers
3questions
Github Skills (15)
grammar10
data-analysis10
pandas10
grammars10
python10
plot10
testing9
data-visualisation9
data-visualization9
data-visualizations9
oop6
stored-procedures6
architecture6
mysql6
java6
Programming languages (6)
Github contributions (5)
has2k1/plotnine
May 2014 - Nov 2014
A Grammar of Graphics for Python
Role in this project:
Data Scientist
Data ScientistContributions:16 commits in 5 months
Contributions summary:Jonas primarily contributed to the development and improvement of the `plotnine` library, which is a Python implementation of the Grammar of Graphics. Their work involved adding new features, specifically focusing on axis limits and bar plot functionalities. They also introduced test cases to ensure the correctness of the implemented features and addressed bugs related to facetting and color brewer.
data-analysispythongrammar-of-graphicsgrammarplotting
arnfred/Knitwit
Mar 2014 - Aug 2020
A web app for creating a knitting pattern from an image
Contributions:130 commits, 2 PRs, 7 pushes in 6 years 6 months
knittingpatternknitting-pattern
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.