Full-stack PHP developer who builds the hard parts of e-commerce.

AttrConfigurator: one photo, every variant

Instead of photographing every fabric × color × leg combination, each product has one base photo. Every part of the product is a CSS-masked layer filled with a color or texture, with its own blend mode, opacity and stacking order. Choosing an option repaints the layers instantly.

• Staff admin for uploading masks (PNG/JPEG automatically converted to WebP with PHP GD, transparency kept), a materials library, and attribute-to-material mappings at global, category, supplier or product level.
• 22-table MySQL schema with 21 versioned upgrade scripts: layers, materials, price rules (add / set / multiply), visibility rules and prioritized JSON condition rules.
• Safe concurrent editing for staff: InnoDB transactions, SELECT … FOR UPDATE and optimistic last-updated checks.
• A new rule resolver rolled out in shadow mode with parity reports against the old logic before switching over.
• Plugged into the existing add-to-cart flow, per product, alongside or instead of the store's commercial attribute module.

The production code belongs to the store. The demo is a from-scratch rebuild of the core technique: my own art, textures and code.

Guitar Lessons Journal

The app I use to run my own guitar teaching: weekly slots turn into lessons automatically, then attendance, partial payments, debts and monthly income. It works offline and syncs to a password-protected PHP API with atomic writes and 60 days of daily backups. Lesson reminders are sent as Web Push notifications I implemented from the RFCs (VAPID + aes128gcm, PHP openssl only), driven by cron. Every push to main deploys through GitHub Actions over FTPS.