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Full-stack developer at djt-group, specializing in high-performance web applications, cloud architecture, and uncompromising code quality. Turning complex problems into elegant, maintainable systems.
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A free, open-source, end-to-end encrypted social network that belongs to the people on it. Small circles instead of algorithmic feeds, no ads or tracking, keys kept on-device, and fully self-hostable.
Follow-up to the completed introductory course: the University of Helsinki's Advanced Course in Programming – object-oriented programming, functional style, recursion, regular expressions and a small game in Pygame.
Working through the interactive Learn Rust course right inside the IDE – ownership, borrowing, traits and error handling, each lesson checked by tests before moving on.
AI-driven workplace simulation platform built with djt-group. Voice-based scenarios under pressure, automated scoring of tone and structure, team benchmarking and analytics for enterprise training.
Searches Aukro and Bazoš for genuinely good deals on TVs, computers and gaming gear, and shows electronics given away for free to whoever picks them up.
The React Native (Expo) mobile app for YoTiM, the internal time-tracking tool at Yord s.r.o. I built the whole app – project and task picker, timer, entries that work offline and sync of logged hours. The backend and the web dashboard were already built; I did not work on those.
A recording booth built for Yord Studio: a visitor describes their dream animal out loud, a live Gemini voice model answers and asks follow-ups, and the booth draws the result on its display – pixel by pixel, like an old CRT resolving an image. Every conversation gets a random voice and personality, and each picture lands in a public gallery with a QR code to download it.
3rd place at GJS Hackathon. Built with my team in 24 hours under the theme 'interactive museum' – a DOOM-inspired playable experience live at doom.djt-group.com. The result earned us the commission to build the Yord site.
Won the regional round of the Czech AI Olympiad 2026 in Mladá Boleslav in the AI Tech line – individual technical challenges in the style of the international IOAI and CEOAI contests. Advancing to the national finals.
Reached the finals of the Czech national round of the National Cyber Security Competition (kybersoutez.cz), advancing through qualification rounds of cryptography, network security and forensics challenges among the country's top young talents.
Completed Introduction to Programming, the first half of the University of Helsinki's course – from the basics through data structures, files, error handling and modules. Verified certificate on mooc.fi.
My personal Linux desktop: full Hyprland rices (illogical-impulse, Ambxst) swapped in place with a single keypress via a custom chezmoi-based tool, dotswap, plus a minimal i3 session. Open source and self-installing.
Cisco Networking Academy
Linux Essentials certification from the Cisco Networking Academy (LPI-aligned): the command line, file systems and permissions, package management, processes and shell scripting – the base I build on while running Arch/CachyOS daily.
Open to internships, collaborations and interesting open-source or student projects. Let's build something exceptional together.
jachym@djt-group.com