Software engineer in Prague. I've been building web products since 2012 and care about what they do for people as much as how they're built.
I'm Slovak, from Banská Bystrica, and I live in Prague. I got my first web job in 2012, writing HTML and CSS for a regional media company, and never really stopped.
What I work on
At Ceros I work remotely on Flex, a studio for building interactive web content without code, with an AI design assistant built in. Before that I spent four and a half years on MarkUp, a review tool for creative teams. I came to Ceros with Avocode, the design handoff tool I joined in 2018 and Ceros bought in 2021.
In 2018 I cofounded Pretlak, a job board for creative and tech jobs in Slovakia and Czechia. I still lead the tech side and write a lot of the code.
I care a lot about front end work that's accessible and done well, right down to the pixel. At Ceros that includes work on our design system and on accessibility. I work full stack, mostly in TypeScript with React, Next.js and Node.js.
Side projects
Running Coach
A running coach for Claude. It plans your season week by week and checks each morning's HRV against the plan, with data from TrainingPeaks or Strava. Paces, zones and load limits are calculated by scripts, so the numbers stay the same from one conversation to the next.
Built with Python, TrainingPeaks, Strava.
HADAL
A pixel art browser game: you take a small research sub to the bottom of the Mariana Trench, almost 11,000 m down. It has 45 real deep sea species, each with a source. There are no audio files at all; every sound is synthesized in the browser. Featured on Phaser.io.
Built with Phaser, TypeScript, Web Audio.
UAP Insight
A daily UFO and UAP news digest I started after the war.gov/UFO declassification release in May 2026. Every morning it pulls news and government sources and summarizes them with AI. The declassified documents are also published as an open dataset under CC BY 4.0.
Built with Next.js, Supabase.
Na trase
Our blog, in Slovak, about running across mountain ranges over several days. Each trip has the route, distance and elevation, plus where we slept and what we carried.
Built with Next.js, MDX.
Beyond code
Most of my time away from the laptop belongs to my family and our two kids.
I also run: half marathons and marathons on the road, and in the mountains longer trips over several days, sometimes more than a hundred kilometers. We write those trips up on Na trase, and Running Coach exists because I coach myself.
Get in touch
The best way to reach me is email: tomas@tomasstankovic.dev