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 85.7%Reviews 9.3%Pull requests 4.7%Issues 0.3%

AI coding

on WakaTime

69%AI-driven

AI 668

69%

Human 307

31%

</> 975 line changes · 13 ai sessions

Tokens

81.1M80.9M in · 216.8K out

Agent cost

$243actual · 7d

Prompts

171900 chars avg

AI coding

14%of coding time

Agents

Claude

668 lines · $215

Opus

0 lines · $29

Coding activity

13h 23m · last 7 days

Languages

Java25.73%SQL17.68%Vue10.65%TypeScript7.71%YAML5.75%CSS5.75%Git Config3.96%Java Properties3.62%Astro3.37%Markdown3.32%JSON2.68%HTTP Request2.13%Image (svg)2.09%Kotlin1.79%Groovy1.58%Bash1.28%Properties0.38%Makefile0.17%HTML0.09%Batchfile0.09%Text0.09%XML0.04%D0.04%

Editors & Tools

cmux34.79%Claude Code16%IntelliJ IDEA7.82%SparkDesktop7.06%Excel5.51%Slack5.13%DataGrip4.94%ClickUp2.7%iTerm22.4%VS Code2.35%Fork1.99%ChatGPT1.73%Antigravity IDE1.15%Notion1.04%Warp1.03%GitHub0.87%Figma0.74%Unknown Editor0.72%Chrome0.71%Postman0.5%Notes0.27%Zed0.27%Perplexity0.25%Air0.02%PowerPoint0.02%Word0.01%

Operating systems

Mac100%