Software engineer, data visualisation specialist, and amateur coxswain.

I'm John, a senior software engineer based in Cambridge. I build data visualisations, developer tools and complex frontend systems.

Selected work

Allotment
A VS Code-inspired React component for building resizable split views. 240k+ weekly npm downloads and 1.2k+ GitHub stars.
Allotment
Cambridge Bumps
Interactive charts and historical results for Cambridge University rowing races. Explore over 200 years of bumps racing data.
cambridgebumps.com
Pennant
High-performance React charting library for financial data. Built on Canvas API for 60fps rendering with technical indicators.
Pennant

View all projects

Selected writing

Web Workers Beyond Applications

Trade-offs for JavaScript Libraries

TypeScript monorepos without the drama (pnpm + Vite)

How to structure packages, wire up tooling, and ship clean artifacts.

Advice I'd give a younger self

On trade-offs, incidental complexity, and knowing when to ask the question.

View all articles

Work

Company
Cambridge Intelligence
Role
Senior Software Engineer
Date
2025 Present
Company
Mulberry House Software
Role
Founder & Principal Engineer
Date
2016 2025
Company
Redgate
Role
Product Manager
Date
2014 2016

Earlier: SunGard · Fidelity · MathWorks · QinetiQ