Developer in Prague. I build web apps in Next.js and TypeScript, backends in Python and Go, and spend the rest of my time on cybersecurity and AI competitions.
Training Evaluation Platform
Teams rehearse hard moments here, like a client pitch, a command decision or an emergency call, in web and VR scenarios built from their own data. AI characters play the other side. Every session is scored on clarity, confidence and decision quality, and the scores end up in team dashboards.
Next.js, TypeScript, AI scenarios, Analytics
24h hackathon, 3rd place
A bilingual (EN/CZ) site about the DOOM series, built by our team of three from an empty repo at the GJS hackathon. It has a weapons catalogue, a games timeline, an archive of sounds, 3D models and artwork, and a /play page that runs DOOM (1993) in the browser through DOS emulation.
Next.js, TypeScript, DOS emulation, EN / CZ
Imageboard
Boards, threads, replies, image uploads, and token-based identity instead of accounts. The Next.js front end talks to a FastAPI service mounted at /api/py, Supabase handles Postgres and file storage, and all of it deploys as one Vercel project.
Next.js, TypeScript, Python, FastAPI, Supabase
CHIP-8 emulator in the browser
A CHIP-8 interpreter written in Go and compiled to WebAssembly, so it runs in the browser. The CPU executes ten instructions per 60 Hz frame and hands the 64×32 framebuffer to a canvas, while the delay and sound timers count down on their own goroutine and drive a Web Audio beep. Pong, Tetris, Space Invaders and a few other ROMs are built in, or you can load your own .ch8 file.
Go, WebAssembly, syscall/js, Canvas, Web Audio
Minesweeper in the terminal
Keyboard-only Minesweeper on tcell. Three difficulty presets and custom board sizes, flood-fill reveal, flags and a timer. It's on the AUR and released under the Unlicense.
Go, tcell, TUI, AUR
Czech AI Olympiad, run by nvias
The first year of the Czech AI Olympiad, which qualifies for the International Olympiad in AI. You train models on real data and then defend the solution to a technical jury.
Gymnázium Jaroslava Seiferta, Prague
24 hours, 18 teams of three from around the country, and a pitch at the end to a jury of engineers from software companies. Our team built DOOM Museum, and it's still online.
National cybersecurity competition, run by AFCEA
The national cybersecurity competition for secondary schools, with NÚKIB as the expert guarantor.
National cybersecurity competition, junior category
National final, junior category. Tasks covered cryptography, network forensics, web exploitation and security theory.
University of Helsinki programming MOOCs and a Cisco Networking Academy course. Each links to the certificate on the issuer's validation page.
Python Programming MOOC
Java Programming MOOC
Python Programming MOOC
Cisco Networking Academy
Open to internships and freelance work. Write to daniel@djt-group.com or use the form, and I'll reply by email.
