April 20-23, 2021


Сonference for JavaScript developers

About conference HolyJS

HolyJS 2021 Piter is a JavaScript conference that took place on April 20-23, 2021.

We bring together JS developers to discuss the present and future of JavaScript community with the world's leading experts and watch dozens of frontend talks and much more. We dwell on both backend and desktop.

Conference features

  • Virtual platform and networking
  • 4K video
  • Livestream and recordings
  • We stand by what we do. If you are not satisfied with your experience, we'll give you your money back
  • Contests and talks from the partners
  • Online discussion zones


Vitaly Friedman Smashing Magazine

Vitaly Friedman loves beautiful content and doesn’t like to give in easily. Originally from Minsk, Belarus, he studied computer science and mathematics in Germany where he has discovered his passion for typography, writing and design. After working as a freelancing designer and developer for 6 years, he co-founded Smashing Magazine, one of the largest online magazines dedicated to Web design and development. Vitaly is writer, co-author and editor of both Smashing Books. He is now working as the editor-in-chief of Smashing Magazine in the lovely city of Germany, Freiburg.

20 years of frontend development. So what? Independent developer for 16 years. Sold out to corporations. Jack of all trades, master of none. More of the last part. Founder and chief-editor of the Frontender Magazine. Failed miserably. Speaker at international and local conferences. The further the local. UA Web Challenge expert. Ex. Magical talking bear prostitute.

A Software Engineer and enthusiast, capable to create products from idea to production. Vladimir's programming experience began from the last school years when he finished Computer Science classes. Then he went to the University and dive deep into the science of how semiconductors grow. And from 2011 Vladimir has been working as a software engineer including his master's degree project, where he used programming skills to create complex computation and analysis tools. He also worked in games, social and event industries. Was part of an incredible team of Interactive Lab in Moscow, helped friends from IvanRast in Saint-Petersburg to create digital experiences, CMS for a museum, and interactive presentations. In 2016 Vladimir had invited one of the gaming companies in Prague and later joined one of the best IT sports companies DELTATRE as a Senior Software Engineer.

Actively propagating web application safety. Love testing and works at Cypress.io for the second time. Material-UI core team member. Active (or not really) open source contributor.

Love chihuahua, volleyball, OCaml, and cooking.

Ujjwal is a Compilers Hacker at Igalia working on TC39, V8 and SpiderMonkey, a Node.js Core Collaborator, a TC39 Delegate and an International Speaker. He loves to talk about open source software, JavaScript and web standards.

Daniil Gonik ClauseMatch

Born and raised in St. Petersburg. Loves to travel, socialize, and solve complex problems (both technical and life). Daniil also managed to work with both the frontend and the backend, which helps a lot in the current work of the team lead.

Partners Become a partner

We would not be able to hold HolyJS on a regular basis without the tremendous support of our partners. Our conference is growing and evolving thanks to their efforts.

Platinum partner

Silver partners