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

3,540 · past year

AugSepOctNovDecJanFebMarAprMayJunJul

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Commits 83.3%Reviews 10.8%Pull requests 5.7%Issues 0.3%

AI activity

on WakaTime

$2.8Kspend · 7d

Opus

$2,230 · 4,721 lines

Fable

$575 · 1,427 lines

Others

$0 · 12 lines · Haiku, Claude

cost share · 4 models · actual spend

</> line changes 99% AI · 6,160 ai / 79 human

Tokens

636.3M635.2M in · 1.1M out

Prompts

4901.8K chars avg

Sessions

50~10 prompts each

AI pairing

10h 26m26% of coding time

Coding activity

8h 30m · last 7 days

Languages

Java39.96%SQL18.93%YAML11.7%TypeScript10.94%Bash9.74%Markdown4.17%JSON1.91%Kotlin0.85%Groovy0.7%Vue0.7%Astro0.25%Java Properties0.15%

Editors & Tools

Claude Code34.11%Orca24.59%SparkDesktop12.73%Excel5.78%cmux3.9%Unknown Editor2.84%Notion2.34%ClickUp2.16%DataGrip1.87%Notes1.83%Slack1.59%IntelliJ IDEA1.42%GitHub1.31%VS Code1.09%Warp0.99%Fork0.59%iTerm20.55%Perplexity0.21%ChatGPT0.1%

Operating systems

Mac100%