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

3,515 · past year

AugSepOctNovDecJanFebMarAprMayJunJul

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Commits 83.3%Reviews 10.7%Pull requests 5.7%Issues 0.3%

AI activity

on WakaTime

$3.2Kspend · 7d

Opus

$2,260 · 4,724 lines

Fable

$816 · 2,307 lines

Sonnet

$102

Others

$0 · 60 lines · Haiku, Claude

cost share · 5 models · actual spend

</> line changes 94% AI · 7,091 ai / 418 human

Tokens

755.6M754.2M in · 1.4M out

Prompts

5531.5K chars avg

Sessions

62~9 prompts each

AI pairing

13h 09m26.6% of coding time

Coding activity

10h 44m · last 7 days

Languages

Java38.57%SQL19.21%TypeScript10.41%JavaScript8.28%YAML6.44%Bash6.2%Markdown4.07%Vue3.64%JSON1.51%Astro0.99%Kotlin0.66%

Editors & Tools

Claude Code32.09%Orca22.55%SparkDesktop14.74%cmux9.2%Excel4.74%DataGrip2.17%ClickUp2.05%Unknown Editor1.84%VS Code1.77%Warp1.52%GitHub1.39%IntelliJ IDEA1.25%ChatGPT1.04%Slack0.98%Notion0.97%Notes0.61%Fork0.5%Zed0.28%Perplexity0.17%iTerm20.13%

Operating systems

Mac100%