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

3,502 · past year

AugSepOctNovDecJanFebMarAprMayJunJul

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

AI activity

on WakaTime

$2Kspend · 7d

Fable

$1,005 · 2,705 lines

Opus

$853 · 1,225 lines

Sonnet

$143

Others

$3 · 86 lines · GPT, Claude

cost share · 5 models · actual spend

</> line changes 91% AI · 4,016 ai / 421 human

Tokens

517M516M in · 1M out

Prompts

387850 chars avg

Sessions

52~7 prompts each

AI pairing

11h 27m24% of coding time

Coding activity

8h 06m · last 7 days

Languages

Java37.77%SQL15.48%TypeScript11.72%JavaScript10.99%Vue6.62%HTML6.25%Markdown3.52%TSV3.28%Bash1.64%Astro1.09%JSON0.91%Diff0.67%YAML0.06%

Editors & Tools

Claude Code24.56%Orca21.28%SparkDesktop17.5%cmux13.07%Excel3.86%DataGrip3.06%Slack2.53%Unknown Editor2.46%ClickUp2.44%GitHub2.28%VS Code1.78%Warp1.33%ChatGPT1%Fork0.92%IntelliJ IDEA0.73%Zed0.47%Notes0.31%Perplexity0.18%iTerm20.15%Notion0.1%

Operating systems

Mac100%