moroz.dev

Hello World! My name is

Karol Moroz.

I build modern Web applications.

I am a Senior Full Stack Developer based in The Hague, Netherlands.

Karol Moroz outside the Louvre in Paris

"I have a receding hairline and am astigmatic.
I own a counterfeit Patagonia jacket."

— Karol Moroz

Selected work

All projects
Five CodeShare screens in light and dark appearance, in English, Dutch and Traditional Chinese. Shown are the current-store card, the Bonuskaart, vouchers grouped by store and a voucher detail view with its barcode. All values are fictitious.

CodeShare

2026 · Private; sideloaded

A private iOS application for storing and sharing Albert Heijn deposit vouchers within a household. The Go backend stores voucher contents only as end-to-end encrypted blobs.

  • End-to-end encryption
  • Local-first storage
  • Secure Enclave device keys
  • SwiftUI
  • GRDB / SQLite
  • CryptoKit
  • Secure Enclave
  • Go
  • Echo v5
  • +6 more

Project notes