Kacper Szarkiewicz

Frontend Engineer

let's build together

I build dApps. I specialise in Frontend and UX in Web3.

Design engineering is my hobby.

The Standard for DeFi Numeric Inputs.

Why CSS dashed borders fall short and how to build precise, fadeable dotted lines with repeating-linear-gradient.

Something native UIs get right that most web tooltips don't.

Interactive CSS-only glow effect cards that track the pointer position using custom properties.

An iMessage composer built with group-focus-within and group-has - tray collapse, icon crossfade, and conditional pickers, all CSS-only.

CSS z-index explained: why z-index: 9999 fails, how stacking contexts trap elements, and how the top layer solves it.

Stay updated with my latest articles and projects. No spam, no nonsense.

Articles I find interesting

You can see more of my work on X, more of my code on GitHub, and my videos on YouTube.