# ONDYS.DEV — Portfolio of Ondřej Sládek
# Canonical: https://ondys.dev/llms.txt
# Full version: https://ondys.dev/llms-full.txt

> Solo developer & product builder based in Prague, Czechia.
> Specializing in Flutter mobile apps, offline-first solutions, AI visibility tools, and web security scanning.

## About

I'm Ondřej Sládek (ONDYS), a solo developer focused on building practical tools that solve real problems. I work primarily with Flutter for cross-platform mobile development, with a strong focus on offline-first architecture, PDF generation, and QR payment integrations.

## Primary Services

1. **Flutter Mobile App Development**
   - Cross-platform Android & iOS apps
   - Offline-first architecture (SQLite/Drift)
   - PDF generation, QR code payments
   - API integrations (ARES, payment gateways)

2. **AI-ready Website & E-commerce Audits**
   - Visibility analysis for AI search (ChatGPT, Perplexity, Google SGE)
   - Schema markup and structured data audits
   - Recommendations export (CSV/PDF/XML)

3. **Web Firewall / Security Scanning**
   - Detection of manipulative patterns (dark patterns)
   - Prompt injection attempt detection
   - Data exfiltration risk analysis

## Selected Projects

- **FACHA** — Offline invoice & job tracking app for tradespeople (Flutter, SQLite, PDF/QR)
- **AI Audit Tool** — Website AI visibility checker with reporting
- **Web Firewall** — Security scanner for risky web patterns
- **Idle Economy Simulator** — Game economy balancing tool (Godot)

## Key Pages (English)

- Homepage: https://ondys.dev/en/
- Services: https://ondys.dev/en/services/flutter-app-development
- Services: https://ondys.dev/en/services/ai-visibility-audit
- Services: https://ondys.dev/en/services/web-firewall-scanning
- Projects: https://ondys.dev/en/projects
- FAQ: https://ondys.dev/en/faq
- Contact: https://ondys.dev/en/#contact

## Key Pages (Czech)

- Homepage: https://ondys.dev/cs/
- Služby: https://ondys.dev/cs/services/vyvoj-mobilnich-aplikaci
- Služby: https://ondys.dev/cs/services/ai-audit-webu
- Služby: https://ondys.dev/cs/services/web-firewall-skenovani
- Projekty: https://ondys.dev/cs/projects
- FAQ: https://ondys.dev/cs/faq
- Kontakt: https://ondys.dev/cs/#contact

## Contact

- Email: ondys.dev@gmail.com
- GitHub: https://github.com/kelosamalosa-png
- LinkedIn: https://linkedin.com/in/ondrej-sladek
- Location: Prague, Czechia

## Technical Stack

Flutter, Dart, SQLite/Drift, Python, Streamlit, Astro 5, Tailwind CSS 4, React 19, Godot

---
Last updated: 2026