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

3,480 · past year

AugSepOctNovDecJanFebMarAprMayJunJul

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Commits 83.4%Reviews 10.7%Pull requests 5.6%Issues 0.3%

AI activity

on WakaTime

$1.6Kspend · 7d

Fable

$1,287 · 5,501 lines

Opus

$290 · 1,539 lines

Others

$66 · 164 lines · Sonnet, GPT, Claude

cost share · 5 models · actual spend

</> line changes 97% AI · 7,204 ai / 200 human

Tokens

505.8M504.5M in · 1.4M out

Prompts

4601.2K chars avg

Sessions

52~9 prompts each

AI pairing

14h 12m26.8% of coding time

Coding activity

10h 15m · last 7 days

Languages

Java27.44%Markdown14.97%TypeScript14.49%SQL9.96%HTML8.04%Bash5.75%JavaScript3.84%YAML3.41%TSV2.56%Python1.65%Vue1.55%Java Properties1.55%Git Config1.12%Astro0.64%JSON0.53%D0.53%Diff0.53%Properties0.37%Shell Script0.32%textmate0.27%Text0.27%CSS0.16%XML0.05%

Editors & Tools

Claude Code24.47%Orca19.81%cmux17.71%SparkDesktop12.26%Unknown Editor3.58%ClickUp3.4%Slack2.93%DataGrip2.68%Fork2.46%VS Code2.37%Warp2.13%iTerm21.99%GitHub1.91%IntelliJ IDEA0.7%Notion0.61%Excel0.61%WebStorm0.18%Zed0.17%ChatGPT0.01%

Operating systems

Mac100%