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Jeremiah Say

Lead Systems Architect @GreenCalculus. Building 1,000+ GHG Protocol calculators in Vanilla JS — IPCC AR6, IEA 2026, DEFRA 2025. Zero dependencies. greencalculus.com

Location Singapore Joined Joined on  Personal website https://greencalculus.com

Education

Singapore Institute of Technology

Work

Lead Systems Architect at GreenCalculus

CSRD/ESRS E1 disclosure requirements, translated into data fields — a developer's map
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CSRD/ESRS E1 disclosure requirements, translated into data fields — a developer's map

#javascript #sustainability #php #carbon
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7 min read
Building a SHA-256 audit trail for emission factor provenance in WordPress
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Building a SHA-256 audit trail for emission factor provenance in WordPress

#php #sustainability #wordpress #carbon
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6 min read
How to build a grid emission factor lookup in Vanilla JS using IEA 2026 regional data
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How to build a grid emission factor lookup in Vanilla JS using IEA 2026 regional data

#javascript #sustainability #webdev #carbon
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5 min read
Building a zero-dependency carbon calculator platform — architecture decisions and why I rejected every framework
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Building a zero-dependency carbon calculator platform — architecture decisions and why I rejected every framework

#javascript #webdev #sustainability #css
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4 min read
Why most carbon calculators are using the wrong methane GWP value (and how to fix it)
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Why most carbon calculators are using the wrong methane GWP value (and how to fix it)

#sustainability #javascript #opensource #carbon
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2 min read
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