Software engineer · Toronto

Bringing your ideas to life through software.

Twenty years building systems that scale, mostly in Java. The tools are changing fast — but getting the domain model right still matters more than any of them.

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allan@toronto — zsh

// latest writing

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Jun 7, 2026 Don't outsource the thinking Developers are starting to refuse to work without AI. The tools were never the problem — handing over the part that thinks is. aiengineeringcraft
May 30, 2026 Modeling the domain first Why I reach for the domain model before the framework, the database, or the API. engineeringdomain modeling

// what I'm working on

live from GitHub & WakaTime

GitHub contributions

3,455 · past year

JulAugSepOctNovDecJanFebMarAprMayJunJul

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Commits 83.4%Reviews 10.8%Pull requests 5.5%Issues 0.3%

Agent activity

on WakaTime

$452spend · 7d

Fable

$318 · 2,343 lines

GPT

$84

Opus

$50 · 27 lines

Claude

$0 · 122 lines

cost share · 4 agents · actual spend

</> line changes 39% AI · 2,492 ai / 3,960 human

Tokens

130.9M130.4M in · 490.1K out

Prompts

2011.7K chars avg

Sessions

31~6 prompts each

AI pairing

6h 54m12% of coding time

Coding activity

9h 28m · last 7 days

Languages

Java36.58%SQL23.95%TypeScript14.33%YAML5.03%HTML4.27%Markdown3.65%JavaScript3.14%Java Properties2.33%Bash2.2%Properties1.32%JSON1.19%Astro0.63%Kotlin0.5%CSS0.44%Git Config0.25%GitIgnore file0.06%XML0.06%HTTP Request0.06%

Editors & Tools

cmux28.08%Claude Code14.97%SparkDesktop13.24%Unknown Editor6.5%DataGrip5.28%Fork4.96%IntelliJ IDEA4.61%ClickUp4.1%Slack2.77%iTerm22.65%VS Code2.59%GitHub2.56%Orca2.03%Warp1.97%WebStorm1.49%Zed1.16%Air0.38%Notion0.33%Excel0.16%‎WhatsApp0.14%Postman0.01%

Operating systems

Mac100%