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

3,494 · past year

AugSepOctNovDecJanFebMarAprMayJunJul

Less More

Commits 83.3%Reviews 10.8%Pull requests 5.6%Issues 0.3%

AI activity

on WakaTime

$2.1Kspend · 7d

Fable

$1,109 · 4,225 lines

Opus

$808 · 1,225 lines

Sonnet

$151

Others

$3 · 74 lines · GPT, Claude

cost share · 5 models · actual spend

</> line changes 93% AI · 5,524 ai / 420 human

Tokens

551.8M550.6M in · 1.2M out

Prompts

351901 chars avg

Sessions

49~7 prompts each

AI pairing

11h 53m24.6% of coding time

Coding activity

8h 33m · last 7 days

Languages

Java35.12%SQL14.19%JavaScript10.41%Markdown9.01%TypeScript8.43%Vue6.28%HTML5.93%Bash3.31%TSV3.08%Python1.98%Astro1.05%Diff0.64%Java Properties0.41%Text0.12%YAML0.06%

Editors & Tools

Claude Code24.56%Orca22.71%SparkDesktop16.55%cmux12.96%DataGrip3.03%Warp3%Excel2.6%Slack2.51%GitHub2.34%Fork1.95%VS Code1.87%ClickUp1.71%Unknown Editor1.18%ChatGPT0.99%iTerm20.91%IntelliJ IDEA0.51%Zed0.47%Notion0.1%Notes0.06%

Operating systems

Mac100%