Jiri Hysek

Web App Development

• Ruby on Rails - I used Ruby on Rails as my main framework for web apps between 2006 and 2020. As a freelancer, I used RoR for countless projects (auctioning systems, CRM, CMS, e-commerce, API servers for mobile apps, social network, medical databases, and backends for React frontends).
• Test-driven development
  - RSpec, Capybara (RoR),
  - React testing library + Jest (React.js)
• React.js - I've been using it in full-time job since 2020 to 2023.
• Next.js - a framework for React.js. I use it for my personal projects like this website, zerovendor.com, dottygames.com, and more.
• Javascript, Typescript
  - with React and Node.js
• Node.js, Express, Fastify, NestJS
  - backend services in my full-time job, and for various personal projects.
• MySQL, PostgreSQL, MongoDB, Firebase
  - MySQL mostly for personal stuff and my own projects
  - PostgreSQL for a product in my full-time job
  - Experiments with NoSQL databases like MongoDB and Firebase, used in some of my hobby projects

Game Development

• Godot Engine
  
  • iOS / Android / web / Win / Mac / Linux games
  • I've created about 20 games within game jams. Check them out at jhysek.itch.io, it's fun!
  • Several mobile games for preschool children (see puntici.cz) - A few marketing games during my freelance times

Mobile App Development

I've been creating multiplatform mobile apps using frameworks like Ionic, Phonegap, or Corona SDK. Unfortunately, apps made in those frameworks sucked couldn't compete with native apps. Therefore, I'm not currently making mobile apps, but I'd love to experiment with some fresh frameworks, such as React Native.

My projects

I created a few own projects. Unfortunately, most of them rest in peace already. Still, the experience is priceless.

Linux security - Talks & Papers

• Intruder in the Linux system - a talk at a security conference, Hotel Olympik, Praha, 14.9. - 15.9. 2004.
• Presence hiding techniques in Linux systems - a talk at UNIX/Linux security conference, Hotel Olympik, Praha (see the review on root.cz), 22.6. - 23.6. 2004.
• Linux rootkit - four articles for Hakin9 magazine, 2004.
• Rootkits based on VFS hooking - an article for Prielom #24 @ hysteria.sk, 28.3. 2006
• Kernel rootkits detection - an article for Prielom #22 @ hysteria.sk, 28.2. 2004

Formal Verification - Talks & Papers

I have published a couple of articles on formal verification that were presented at research conferences during my unfinished Ph.D. studies.

• Model-Based Design and Verification of Reactive Systems - a talk at EUROCAST 2009 in Las Palmas de Gran Canaria + article in Lecture Notes in Computer Science 2009
• Visual design of SmallDEVS models using statecharts. - presentation at ASIS 2008 conference
• Evoluční návrh s využitím přepisovacích systémů. - presentation at EEICT 2007 conference

• Game Jams
  Game jam is an event where participants make a video game from scratch in 48h. Check out my games at jhysek.itch.io. I made like 20 of those.
• Educational mobile games for children
  Games for preschool kids, mainly in Czech but one of the games is localized also to English and Spanish.

  I started it with my daughter because I wanted to spend some fun time with her but I don't like playing with dolls. So we made a game! She was doing voiceovers when she was 4 years.

  - Puntici.cz (czech)
  - DottyGames.com - not really ready yet
• Programming languages
  

  It's always fun to learn a new interesting programming languages! I worked with a lot of them in the past. The next languages I'd love to have time to learn are Rust, Go, or Elixir. So if you have a project I could learn those on, let me know ;)

I suppose, someone would like to learn about my education. So here you are:

Brno University of Technology