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

3,585 · past year

JulAugSepOctNovDecJanFebMarAprMayJunJul

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Commits 83.7%Reviews 10.6%Pull requests 5.4%Issues 0.3%

AI coding

on WakaTime

40%AI-driven

AI 182

40%

Human 269

60%

</> 451 line changes · 4 ai sessions

Tokens

8.8M8.8M in · 44.1K out

Agent cost

$44actual · 7d

Prompts

19215 chars avg

AI coding

5%of coding time

Agents

Claude

174 lines · $30

Opus

8 lines · $15

Coding activity

6h 09m · last 7 days

Languages

Java31.51%TypeScript13.6%CSS8.29%JSON7.71%SQL7.46%YAML7.3%Git Config3.81%Vue3.81%Markdown3.57%Bash3.32%Kotlin2.57%Astro2.16%TOML1.66%GitIgnore file1.33%HTML0.58%XML0.58%Properties0.33%Java Properties0.17%Image (svg)0.17%JavaScript0.08%

Editors & Tools

cmux46.02%Claude Code13.43%SparkDesktop7.64%IntelliJ IDEA5%ClickUp4.3%Slack4.03%VS Code3.36%GitHub3.03%iTerm22.6%Fork2.35%ChatGPT1.93%DataGrip1.72%WebStorm1.29%Unknown Editor1.14%Warp0.65%Notes0.42%Excel0.31%Notion0.26%Antigravity IDE0.19%Word0.19%Zed0.1%Canva0.02%Postman0.01%

Operating systems

Mac100%