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

3,696 · past year

JulAugSepOctNovDecJanFebMarAprMayJun

Less More

Commits 84.9%Reviews 9.8%Pull requests 5%Issues 0.3%

AI coding

on WakaTime

27%AI-driven

AI 472

27%

Human 1,254

73%

</> 1,726 line changes · 20 ai sessions

Tokens

56.8M56.5M in · 268.4K out

Agent cost

$183actual · 7d

Prompts

1425.6K chars avg

AI coding

19%of coding time

Agents

Claude

456 lines · $121

Opus

16 lines · $62

Sonnet

0 lines · $0

Coding activity

15h 22m · last 7 days

Languages

YAML21.91%SQL17.76%Java17.43%TypeScript13.14%CSS9.25%Astro5.1%Vue4.03%JavaScript3.59%GitIgnore file2.24%Markdown1.34%HTML1.34%Image (svg)0.95%Bash0.62%Java Properties0.42%Batchfile0.34%Makefile0.28%Properties0.11%XML0.06%JSON0.03%Git Config0.03%HTTP Request0.03%

Editors & Tools

cmux37.74%IntelliJ IDEA14.88%Claude Code10.97%SparkDesktop8.57%DataGrip7.05%VS Code4.12%ClickUp3.52%Slack2.67%iTerm22.08%Fork1.71%GitHub1.7%Antigravity IDE1.37%Chrome0.94%Excel0.86%Unknown Editor0.77%Warp0.27%WebStorm0.26%Notion0.24%Zed0.11%Notes0.1%PowerPoint0.02%ChatGPT0.02%Perplexity0.02%Postman0.02%Word0.01%

Operating systems

Mac100%