James Leftley

Principal Architect at Scott Logic

Newcastle upon Tyne, England, United Kingdom
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Summary

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James Leftley is a Principal Architect with 12 years of software engineering experience, currently leading architecture and delivery at Scott Logic in Newcastle upon Tyne. He progressed through developer and lead roles at the same firm, combining hands-on front-end craftsmanship with strategic system design. An active contributor to the d3fc charting library, he focuses on UI/UX, interactive chart behavior and documentation quality—improving pointer interactions and test maintainability. His background in technical direction and production management hints at a practical, user-focused approach to complex problems and cross-disciplinary collaboration. James holds a BSc in Computer Science from Durham University and brings a blend of developer-level attention to detail and architect-level oversight to every project.
code12 years of coding experience
job13 years of employment as a software developer
bookBSc (Hons) Computer Science, BSc (Hons) Computer Science at Durham University
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Github Skills (12)

uid10
javascript10
d3fc10
d3js10
front-end-development10
ui-design10
chartjs10
charting10
charts10
testing9
ux-design9
documentation8

Programming languages (9)

TypeScriptCSSCJavaScriptGoPHPHTMLSwift

Github contributions (5)

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d3fc/d3fc

Nov 2014 - Jul 2020

A collection of components that make it easy to build interactive charts with D3
Role in this project:
userFront-end Developer
Contributions:203 commits, 104 PRs, 10 pushes in 5 years 9 months
Contributions summary:James primarily contributed to the documentation and UI/UX of the d3fc charting library. They fixed image display issues within the documentation site and removed installation sections from the API documentation, suggesting an effort to improve the user experience. Additionally, the user addressed incorrect usage of d3-dispatch and made improvements to the pointer functionality, demonstrating their focus on enhancing interactive chart features. Several commits relate to fixing and improving the existing tests within the repository, showing focus on the maintainability of the library.
visualizationchartsreactchartdata-visualization
jleft/BitFlux

Jul 2015 - Nov 2018

A cross-platform financial charting application to showcase the functionality of d3fc components.
Contributions:8 PRs, 620 pushes, 216 branches in 3 years 4 months
financialreactcharting-applicationchartcharting
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James Leftley - Principal Architect at Scott Logic