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

3,466 · past year

AugSepOctNovDecJanFebMarAprMayJunJul

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

Agent activity

on WakaTime

$714spend · 7d

Fable

$572 · 3,600 lines

GPT

$84

Opus

$58 · 517 lines

Claude

$0 · 145 lines

cost share · 4 agents · actual spend

</> line changes 54% AI · 4,262 ai / 3,561 human

Tokens

220.4M219.6M in · 748.5K out

Prompts

3011.2K chars avg

Sessions

42~7 prompts each

AI pairing

9h 53m17% of coding time

Coding activity

10h 05m · last 7 days

Languages

Java31.18%SQL20.43%TypeScript11.83%Markdown11.29%YAML4.78%Bash4.72%HTML4%JavaScript3.94%Java Properties2.21%Git Config1.37%Properties1.25%JSON0.66%Astro0.6%D0.54%Shell Script0.36%textmate0.24%CSS0.24%Text0.18%XML0.06%GitIgnore file0.06%HTTP Request0.06%

Editors & Tools

cmux29%Claude Code18.95%SparkDesktop10.59%Unknown Editor7.24%Orca5.69%DataGrip4.79%ClickUp4.59%IntelliJ IDEA3.8%Slack2.93%iTerm22.74%VS Code2.14%Fork1.96%GitHub1.92%Warp1.91%Notion0.62%Zed0.55%WebStorm0.4%‎WhatsApp0.14%Excel0.03%Postman0.01%

Operating systems

Mac100%