Petr Brzek is a seasoned product and technology leader with 13 years of experience building and scaling front-end driven products, now serving as CEO of Macaly and Langtail. He blends hands-on front-end engineering—contributing to notable open-source projects like lesshat and Nachos UI—with strategic product leadership from roles at Avocode and Ceros. Comfortable shipping design-focused developer tools and fixing cross-browser UI quirks, he pairs practical CSS/React expertise with a founder’s mindset. Based in Prague, he has a track record of turning UI craftsmanship into product differentiation and developer-facing value. Notably, his open-source contributions include adding animation and transition mixins that improved usability for other front-end engineers.
13 years of coding experience
16 years of employment as a software developer
Czech University of Life Sciences Prague
Soukromá střední škola výpočetní techniky v Praze
Vysoká škola ekonomická v Praze, Fakulta informatiky a statistiky
Contributions:1 release, 196 commits, 3 PRs in 3 years 10 months
Contributions summary:Petr primarily worked on the `lesshat` repository, which is a LESS CSS mixins library. The commits focused on modifying the `mixins.less` file to add new mixins and comment on existing ones. The changes included adding mixins for transition, animation, and other styling features, demonstrating a focus on improving the library's functionality for front-end developers. The user also added descriptions and example usages for the new mixins.
Contributions:20 commits, 8 pushes, 22 comments in 7 days
Contributions summary:Petr primarily focused on improving the user interface of the Nachos UI library. Their contributions involved fixing UI element positioning across different browsers, such as Firefox and Safari, and modifying styles, including font sizes and badge appearance. They also added a hack for Safari to address flexbox-related issues and implemented highlighting of code examples in the documentation.
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.