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

3,887 · past year

JulAugSepOctNovDecJanFebMarAprMayJun

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Commits 85.3%Reviews 9.6%Pull requests 4.8%Issues 0.3%

AI coding

on WakaTime

27%AI-driven

AI 437

27%

Human 1,195

73%

</> 1,632 line changes · 16 ai sessions

Tokens

56.8M56.6M in · 209K out

Agent cost

$171actual · 7d

Prompts

2702.9K chars avg

AI coding

15%of coding time

Agents

Claude

421 lines · $118

Opus

16 lines · $53

Sonnet

0 lines · $0

Coding activity

13h 45m · last 7 days

Languages

Java22.42%SQL21.72%YAML12.41%TypeScript11.54%Vue9.1%CSS6.5%JavaScript4.01%Astro3.35%Markdown1.9%Java Properties1.78%Kotlin1.57%HTML1.12%HTTP Request0.74%Bash0.7%Batchfile0.37%Makefile0.29%Properties0.17%JSON0.08%XML0.08%Text0.04%Git Config0.04%Image (svg)0.04%

Editors & Tools

cmux34.35%Claude Code15.49%SparkDesktop9.13%IntelliJ IDEA8.2%DataGrip6.58%Slack4.82%ClickUp3.41%Excel3.05%iTerm22.76%Fork2.34%ChatGPT1.74%GitHub1.61%Notion1.22%VS Code1.1%Antigravity IDE1.03%Unknown Editor0.75%Chrome0.71%Warp0.64%Notes0.27%Perplexity0.26%WebStorm0.2%Postman0.18%Zed0.13%PowerPoint0.02%Word0.01%

Operating systems

Mac100%