I design and build products end‑to‑end — from the App Store screen down to the escrow state machine.

One panel to run a store across Trendyol, Amazon and Hepsiburada. Products are pulled from each marketplace API and merged by barcode; price & stock push per channel; cross-listing wizard. Beyond catalog it covers the full back-office — orders, shipping, returns, cancellations, invoices, Q&A, finance/settlements and webhooks — each normalized across all three marketplaces.

An end-to-end-encrypted messaging platform — a Signal-style protocol (X3DH + Double Ratchet, AES-256-GCM) with multi-device key management and offline-first sync. A native Swift 6 / SwiftUI client over a Go (Fiber) backend designed for 100k+ concurrent WebSocket connections. The interface is a rigorous component design system, pixel-locked with golden snapshot tests in light and dark.

A content & production studio I co-own. My partners run social, photo and video; the software side is mine — a single-page site that turns the brand's navy-and-white monochrome into a design system, a 17-brand client wall, and a TR/EN layer that follows the visitor's browser. Content is edited from a password-protected panel that commits straight to the repo, and the contact form goes through our own Cloudflare Worker into the studio's inbox. Still no build step: static HTML/CSS/JS served from GitHub Pages.