Josiah Halstead
Senior Data Scientist
United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolJosiah Halstead is a Senior Data Scientist based in the UK with 14 years of experience bridging academic research and commercial analytics across finance, retail, and consulting. He currently drives data science initiatives at EPAM Systems after senior roles at Chetwood Financial and Dee Set, where he progressed from practitioner to lead and ran his own data science consultancy. Trained in biological sciences at the University of Oxford and seasoned by postgraduate research at Liverpool, he blends rigorous experimental thinking with pragmatic production ML. Josiah contributes to open-source tooling—improving type safety, linting and UX for terminal Jupyter notebooks—demonstrating an engineer’s attention to reproducibility and developer experience. He is comfortable translating complex models into auditable business solutions and often focuses on maintainability and tooling improvements that reduce technical debt.
14 years of coding experience
9 years of employment as a software developer
Bachelor of Arts - BA, Biological Sciences, Bachelor of Arts - BA, Biological Sciences at University of Oxford
Github Skills (10)
linting10
codelist10
type-checking10
type-check10
lint10
python10
human-interface9
graphical-user-interface9
user-interface9
jupyter-notebook8
Programming languages (5)
Github contributions (5)
joouha/euporie
Jan 2021 - Jan 2023
Jupyter notebooks in the terminal
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:32 releases, 3 reviews, 838 commits in 2 years
Contributions summary:Josiah made several changes related to type checking and code linting across various files, including the main application and associated modules like the notebook and control files. They also refactored the styling aspects. The user also contributed by adding features such as a menu item to enable more efficient display of notebooks.
ipynbpythonjupyter-notebookkittynotebook
joouha/python-prompt-toolkit
May 2021 - Jan 2025
Library for building powerful interactive command line applications in Python
Contributions:59 pushes, 15 branches in 3 years 9 months
command-line-toolpythonsubcommandspython3prompt-toolkit
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