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

3,864 · past year

JulAugSepOctNovDecJanFebMarAprMayJun

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Commits 85.6%Reviews 9.4%Pull requests 4.8%Issues 0.3%

AI coding

on WakaTime

40%AI-driven

AI 631

40%

Human 960

60%

</> 1,591 line changes · 14 ai sessions

Tokens

62.8M62.6M in · 176.8K out

Agent cost

$189actual · 7d

Prompts

173889 chars avg

AI coding

11%of coding time

Agents

Claude

631 lines · $156

Opus

0 lines · $33

Coding activity

12h 34m · last 7 days

Languages

Java24.94%SQL17.24%Vue12.59%TypeScript8.53%YAML8.25%JavaScript4.38%Markdown3.37%CSS3.27%Astro3.23%JSON2.86%Java Properties2.17%Bash2.07%Kotlin1.94%HTTP Request1.71%Groovy1.71%Batchfile0.41%Properties0.37%Makefile0.32%Image (svg)0.28%XML0.14%HTML0.09%Text0.09%Git Config0.05%

Editors & Tools

cmux35.36%Claude Code14.31%SparkDesktop8.96%IntelliJ IDEA7.12%Excel5.53%DataGrip5.4%Slack5.09%iTerm22.94%VS Code2.73%ClickUp2.46%Fork2.16%ChatGPT1.71%Antigravity IDE1.17%Notion1.02%GitHub0.95%Unknown Editor0.71%Chrome0.7%Warp0.64%Postman0.37%Notes0.26%Perplexity0.25%Zed0.08%Figma0.06%PowerPoint0.02%Word0.01%

Operating systems

Mac100%