Welcome I'm Tomas Pustelnik

I'm front-end developer with focus on semantic HTML, CSS, performance and accessibility. Author of few small open-source projects and founder of Clipio — a web clipping tool for Notion. Currently helping build React at Ataccama. Fan of great and clever design, tooling addict and neverending learner.

I write irregularry about front-end development and about my founder's journey.

Latest articles

• Reflecting on my indiehacking journey building Clipio

  After over a year of development, I finally launched Clipio. This article is a reflection about my journey with highs and lows and lessons I have learned the hard way.

  • Clipio
  • Learn in Public
  • Side project
  • Indiehacking

  Published on June 3, 2025

• 4+1 ways how to handle errors in your code

  Errors will happen in our apps. So let's stop ignoring them and instead be ready to deal with them. Discover 4+1 approaches to error handling, from worst to best.

  • JS
  • Software engineering

  Published on March 29, 2025