TH

Tomas Halac

Senior Backend Engineer · Creator of ZapCalculator

About me

I build web tools that turn mathematical and scientific formulas into fast, easy‑to‑use calculators — with a particular interest in applied math, numerical methods, and clean UX for technical content.

ZapCalculator started as a small project to scratch my own itch and grew into a multilingual calculator hub used by students, engineers, and professionals around the world. I write the code, the math, and most of the content you see on the site.

What I do

Applied Math

Turning formulas into interactive tools people actually want to use.

Backend Engineering

TypeScript, Node.js, MySQL — the plumbing that keeps the calculators fast and reliable.

Multilingual UX

Calculators in 20+ languages, with content adapted — not just translated.

Let’s connect

LinkedIn

Professional profile, career history, and what I’m working on.

GitHub

Open source projects, code samples, and the occasional side experiment.

Get in touch

Calculator ideas, feedback, bug reports — I read everything.

Send a message