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

3,508 · past year

AugSepOctNovDecJanFebMarAprMayJunJul

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

AI activity

on WakaTime

$1.7Kspend · 7d

Opus

$887 · 588 lines

Fable

$645 · 2,245 lines

Sonnet

$123

Others

$4 · 86 lines · GPT, Haiku, Claude

cost share · 6 models · actual spend

</> line changes 87% AI · 2,919 ai / 423 human

Tokens

354.6M353.9M in · 731.3K out

Prompts

373841 chars avg

Sessions

56~7 prompts each

AI pairing

10h 04m22.3% of coding time

Coding activity

7h 51m · last 7 days

Languages

Java32.68%SQL16.04%TypeScript14.19%JavaScript11.33%Bash9.18%Vue4.95%HTML3.46%YAML2.56%Markdown2.15%JSON2.09%Astro1.37%

Editors & Tools

Claude Code25.19%Orca19.2%SparkDesktop18.1%cmux12.2%Excel5.39%DataGrip3.41%GitHub2.39%ClickUp2.3%VS Code1.98%Unknown Editor1.87%Slack1.79%Warp1.62%ChatGPT1.13%Notion1.06%Notes0.66%Fork0.59%IntelliJ IDEA0.48%Zed0.3%Perplexity0.19%iTerm20.14%

Operating systems

Mac100%