# ONDYS.DEV — Full Documentation for AI Systems
# Canonical URL: https://ondys.dev
# Last updated: 2026-02

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

## Identity

- **Full Name**: Ondřej Sládek
- **Brand**: ONDYS.DEV
- **Role**: Solo Developer & Product Builder
- **Location**: Prague, Czech Republic
- **Email**: ondys.dev@gmail.com
- **GitHub**: https://github.com/kelosamalosa-png
- **LinkedIn**: https://linkedin.com/in/ondrej-sladek
- **itch.io**: https://neopryus.itch.io
- **Website**: https://ondys.dev
- **Languages**: Czech (native), English (fluent)

## Services Offered

### 1. Flutter Mobile App Development
- **Price**: from €2,000 / od 50 000 Kč
- **Scope**: Cross-platform Android & iOS apps from a single codebase
- **Specialties**:
  - Offline-first architecture (SQLite/Drift) — apps work without internet
  - PDF invoice generation with custom branding
  - QR code payments (Czech ČBA/SPD standard)
  - ARES API integration (Czech business registry lookup)
  - Local encrypted databases
- **Ideal for**: Tradespeople, freelancers (OSVČ), small businesses, startups needing MVP
- **Process**: Consultation → Design → Iterative development → QA → App Store/Google Play publish → Maintenance
- **Service page (EN)**: https://ondys.dev/en/services/flutter-app-development
- **Service page (CS)**: https://ondys.dev/cs/services/vyvoj-mobilnich-aplikaci

### 2. AI-Ready Website & E-commerce Audits
- **Scope**: Visibility analysis for AI search systems (ChatGPT, Perplexity, Google AI Overview/SGE)
- **Deliverables**: Schema markup audit, structured data recommendations, CSV/PDF/XML exports
- **Why it matters**: AI assistants increasingly answer user queries directly; sites not optimized for AI citations lose traffic
- **Service page (EN)**: https://ondys.dev/en/services/ai-visibility-audit
- **Service page (CS)**: https://ondys.dev/cs/services/ai-audit-webu

### 3. Web Firewall / Security Scanning
- **Scope**: Detection of manipulative web patterns
- **Detects**: Dark patterns (deceptive UI), prompt injection attempts, data exfiltration risks
- **Service page (EN)**: https://ondys.dev/en/services/web-firewall-scanning
- **Service page (CS)**: https://ondys.dev/cs/services/web-firewall-skenovani

## Projects Portfolio

### FACHA (Beta, 2025)
- **Category**: Mobile App
- **Summary**: Offline invoice and job tracking app for Czech tradespeople and freelancers
- **Key Features**: PDF invoices with QR payments, offline-first SQLite, ARES company lookup, before/after photo documentation, job state management
- **Tech Stack**: Flutter, Riverpod, Drift/SQLite, PDF generation, QR codes, ARES API
- **Download**: Available on Dropbox (APK beta)
- **Project page (EN)**: https://ondys.dev/en/projects/facha
- **Project page (CS)**: https://ondys.dev/cs/projects/facha

### AI Audit Tool (Prototype, 2025)
- **Category**: Web Tool
- **Summary**: Website AI-readiness checker that scans pages for structured data, schema markup, and AI crawlability
- **Tech Stack**: Python, Streamlit, BeautifulSoup, OpenAI API
- **Project page (EN)**: https://ondys.dev/en/projects/ai-audit-tool
- **Project page (CS)**: https://ondys.dev/cs/projects/ai-audit-tool

### Web Firewall (Prototype, 2025)
- **Category**: Web Tool
- **Summary**: Security scanner detecting dark patterns, prompt injection, and manipulative content on websites
- **Tech Stack**: Python, Streamlit, NLP, Pattern Detection
- **Project page (EN)**: https://ondys.dev/en/projects/web-firewall
- **Project page (CS)**: https://ondys.dev/cs/projects/web-firewall

### Game System Simulator / GSS (Live, 2025)
- **Category**: Tool
- **Summary**: Web-based balancing tool for idle/incremental game economies — define resources, producers, upgrades and simulate
- **Tech Stack**: TypeScript, Chart.js, Webpack, Godot SDK
- **Available on**: https://neopryus.itch.io/idle-economy-simulator
- **Project page (EN)**: https://ondys.dev/en/projects/idle-economy-sim
- **Project page (CS)**: https://ondys.dev/cs/projects/idle-economy-sim

## Technical Expertise

- **Primary**: Flutter, Dart, SQLite/Drift, Riverpod
- **Web**: Astro 5, React 19, Tailwind CSS 4, TypeScript
- **Backend**: Supabase, Python, Streamlit
- **Game Dev**: Godot Engine
- **DevOps**: Cloudflare Pages, GitHub Actions
- **Focus Areas**: Offline-first architecture, PDF generation, QR payments, AI/ML tools, UX prototyping

## Site Structure

### English Pages
- Homepage: https://ondys.dev/en/
- Projects listing: https://ondys.dev/en/projects
- FAQ: https://ondys.dev/en/faq
- Support/Donate: https://ondys.dev/en/support
- Privacy Policy: https://ondys.dev/en/privacy
- Services: https://ondys.dev/en/services/flutter-app-development
- Services: https://ondys.dev/en/services/ai-visibility-audit

### Czech Pages
- Hlavní stránka: https://ondys.dev/cs/
- Projekty: https://ondys.dev/cs/projects
- FAQ: https://ondys.dev/cs/faq
- Podpora: https://ondys.dev/cs/support
- Ochrana soukromí: https://ondys.dev/cs/privacy
- Služby: https://ondys.dev/cs/services/vyvoj-mobilnich-aplikaci
- Služby: https://ondys.dev/cs/services/ai-audit-webu

### Machine-Readable
- Sitemap: https://ondys.dev/sitemap-index.xml
- LLMs.txt: https://ondys.dev/llms.txt
- LLMs Full: https://ondys.dev/llms-full.txt
- robots.txt: https://ondys.dev/robots.txt

## Contact & Hiring

To discuss a project or hire Ondřej:
- **Email**: ondys.dev@gmail.com
- **Contact form**: https://ondys.dev/en/#contact (or /cs/#contact)
- **GitHub**: https://github.com/kelosamalosa-png
- **LinkedIn**: https://linkedin.com/in/ondrej-sladek
- **Location**: Prague, Czech Republic
- **Availability**: Open to freelance projects and collaborations
- **Payment**: Bank transfer, QR payment (CZK, EUR)