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

3,896 · past year

JulAugSepOctNovDecJanFebMarAprMayJun

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Commits 85.1%Reviews 9.7%Pull requests 4.9%Issues 0.3%

AI coding

on WakaTime

29%AI-driven

AI 487

29%

Human 1,216

71%

</> 1,703 line changes · 22 ai sessions

Tokens

66.4M66.1M in · 276.6K out

Agent cost

$200actual · 7d

Prompts

2772.9K chars avg

AI coding

19%of coding time

Agents

Claude

471 lines · $138

Opus

16 lines · $62

Sonnet

0 lines · $0

Coding activity

15h 59m · last 7 days

Languages

SQL18.7%Java17.76%YAML15.88%TypeScript13.8%CSS8.9%Vue6.65%Astro4.9%JavaScript3.46%GitIgnore file2.15%Markdown2.15%HTML1.38%Kotlin1.34%Image (svg)0.91%Bash0.6%Java Properties0.44%Batchfile0.3%Makefile0.27%Properties0.13%JSON0.1%XML0.07%Text0.07%Git Config0.03%HTTP Request0.03%

Editors & Tools

cmux35.32%Claude Code13.21%IntelliJ IDEA11.02%SparkDesktop8.15%DataGrip6.37%Slack4.4%ClickUp3.52%Excel3.23%VS Code2.93%Fork2.11%iTerm21.98%ChatGPT1.86%GitHub1.36%Antigravity IDE1.1%Notion0.9%Unknown Editor0.77%Chrome0.76%Warp0.55%WebStorm0.21%Zed0.14%Notes0.08%PowerPoint0.02%Perplexity0.02%Postman0.01%Word0.01%

Operating systems

Mac100%