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

3,441 · past year

JulAugSepOctNovDecJanFebMarAprMayJunJul

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Commits 83.4%Reviews 10.8%Pull requests 5.5%Issues 0.3%

AI coding

on WakaTime

13%AI-driven

AI 85

13%

Human 590

87%

</> 675 line changes · 7 ai sessions

Tokens

2.8M2.8M in · 28.9K out

Agent cost

$35actual · 7d

Prompts

411K chars avg

AI coding

3%of coding time

Agents

Claude

79 lines · $17

GPT

0 lines · $13

Opus

6 lines · $4

Coding activity

5h 10m · last 7 days

Languages

TypeScript30.09%Java28.55%SQL14.45%Kotlin5.45%Git Config5.33%Markdown3.32%YAML2.37%JSON2.25%Java Properties2.13%CSS1.54%Properties1.18%Bash0.71%HTML0.71%XML0.71%Image (svg)0.71%Groovy0.12%GitIgnore file0.12%HTTP Request0.12%Astro0.12%

Editors & Tools

cmux41.99%SparkDesktop10.64%Claude Code10.64%Unknown Editor6.19%Fork5.37%iTerm23.55%ClickUp3.43%GitHub2.93%Slack2.86%IntelliJ IDEA2.59%VS Code2.33%DataGrip1.48%Orca1.46%WebStorm1.32%Zed1.09%ChatGPT0.51%Warp0.43%Excel0.38%Air0.37%‎WhatsApp0.14%Notion0.11%Notes0.1%Figma0.06%Postman0.02%

Operating systems

Mac100%