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Jeremiah Say

Lead Systems Architect @GreenCalculus. Carbon accounting infrastructure in pure Vanilla JS — no frameworks, every factor sourced to IPCC AR6, IEA, DEFRA. greencalculus.com

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

Education

Singapore Institute of Technology

Work

Lead Systems Architect at GreenCalculus

I Built a Carbon Calculator Where the Emission Factor Doesn't Exist
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I Built a Carbon Calculator Where the Emission Factor Doesn't Exist

#showdev #javascript #webdev #datascience
Comments 2
4 min read

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The "Audit Trail" Pattern: Architecture for Immutable Sustainability Data
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The "Audit Trail" Pattern: Architecture for Immutable Sustainability Data

#webdev #architecture #sustainability #database
Comments
3 min read
Floating-point will quietly corrupt your emissions math, and 0.1 + 0.2 already warned you
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Floating-point will quietly corrupt your emissions math, and 0.1 + 0.2 already warned you

#javascript #programming #math #carbon
1
Comments
6 min read
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
3
Comments
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
Comments
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
Comments
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
Comments
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
Comments
2 min read
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