Portfolio — 2026

Software developer and
cybersecurity engineer

Daniel Černý

Building secure, high-performance software — from full-stack web apps to network infrastructure and penetration testing.
Prague, CZ

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What I do

Three domains. One engineer.

Python

Python

Backend & Automation

Scripts, bots, data pipelines, FastAPI services. Python is the Swiss Army knife — from rapid prototyping to production-grade tooling.

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React / Next.js

Web Dev

Full-Stack Engineering

React, Next.js, TypeScript on the frontend. Node, APIs, databases on the back. Building things that are fast, accessible, and don't suck.

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Offensive & Defensive

Cybersecurity

Pentesting & Defense

Network analysis, vulnerability assessment, CTF challenges. Understanding systems deeply enough to break them — and fix them.

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