Kai Wei

KAI WEI · ONE-PAGER                                  kayw-geek · 2026.07
========================================================================

Backend engineer. PHP by day, PHP open-source by night.
Beijing · RightCapital

  90+  merged PRs upstream        525  stars · maintainer
    1  CVE credited                 8  years, self-taught

I build backend systems in PHP and Laravel at RightCapital, a US
fintech, and ship fixes upstream into the tools every PHP developer
touches daily. I don't just use the ecosystem — I build it.

OPEN SOURCE
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* 90+ merged PRs: Laravel, Symfony, Composer, PHPUnit, PHP-CS-Fixer,
  PHPStan / Larastan, Spatie, AWS SDK for PHP, Sentry.
* Maintainer of symplify/monorepo-builder (525*).
* phpstan-type-trace starred by the authors of PHPStan and Rector.

SECURITY
--------
* CVE-2026-41570 — argument injection in PHPUnit. Found, reported,
  credited with a published security advisory.

SELECTED PROJECTS
-----------------
2024—  monorepo-builder     Composer tools to split and sync a monorepo.
2025   x-spam-cast          LLM-powered X/Twitter spam filter.
2026   phpstan-type-trace   Full type-inference chain for PHPStan errors.

STACK
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PHP 8.5 · Laravel · AWS · PHPStan · PostgreSQL · Redis

> Trained as a nurse. Taught myself to code. Eight years later:
> fintech backends and upstream commits. No bug, no gain.

github.com/kayw-geek · x.com/KaiWei_capper · /kai-wei-one-pager.pdf