Johnnie Walker
Expert at Rooled
Scotland, United States
Summary
👤
Senior🎓
Top SchoolJohnnie Walker is a strategic finance and operations leader turned startup advisor and investor expert, bringing 14+ years of experience across venture-backed tech, impact investing, and finance transformation. He has led sales and CFO services at inDinero and tempCFO, restructured finance ops for high-growth education and consumer businesses, and pioneered Recoverable Grant investing at Echoing Green while lecturing on impact investing at Columbia Business School. Comfortable at the intersection of finance, product and GTM, he advises founders on fundraising, financial management and growth strategy through roles at Primary Venture Partners and as a director at Rooled. Early career technical and engineering roles in the UK (including BAE Systems and Pentland Systems) give him a rare blend of technical literacy and deal-making experience. An active contributor to developer tooling work—having made substantive full‑stack improvements to the Sketch JavaScript plugin API—he combines operational rigor with hands-on product instincts. Based in Scotland with dual experience in New York venture ecosystems, he’s known for translating complex technical and financial challenges into practical, investable plans.
14 years of coding experience
20 years of employment as a software developer
Fettes CollegeBSc Physics, BSc Physics at University of St AndrewsMBA Finance, MBA Finance at Columbia Business SchoolHeriot-Watt University Edinburgh CampusMBA, MBA at London Business School
Github Skills (9)
javascript10
api10
apidoc10
sketch10
ui-design9
front-end-development9
uid9
architecture8
architectures8
Programming languages (7)
Github contributions (5)
sketch-hq/SketchAPI
Jun 2017 - May 2018
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:6 commits, 4 pushes, 2 branches in 11 months
Contributions summary:Johnnie contributed to the JavaScript plugin library for Sketch, making changes to core functionality. They updated the JS API to match internal refactoring, impacting text rendering and drawing operations. Additionally, the user implemented new arrowhead types and integrated changes from the `develop` branch, likely involving both UI and underlying logic improvements. Their work spanned multiple files and appears to be focused on improving the Sketch plugin's features and maintaining code consistency.
javascriptsketch-appsketchappembeddedsketch
randomsequence/NSSerialisationTests
May 2013 - Sep 2015
Contributions:8 commits, 1 push in 2 years 4 months
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