Freelancer profile translated to English.

Description

I build and operate AI products, voice bots, chatbots, IoT sensors, and SaaS platforms — as the owner of my IT manufactory "Die Netzhandwerker" in Gronau (Westphalia).

My focus: productive multi-LLM architectures (Anthropic Claude, Google Gemini, OpenAI) with clear separation between inference, pseudonymization, and telemetry. GDPR-compliant, EU-First, Hetzner hosting in Germany.

What distinguishes me from pure consultants: I don't develop in PowerPoint, but in the terminal. All my products run in real operation — OKAYPLAY (audio advertising platform with voice actor marketplace), Julia (AI telephone agent via Vapi), FINN (chatbot on my own website), Robert (AI companion for the elderly, DiPA application with BfArM ongoing). plus seven sub-brands in the network (spuerwerk, formwerk, diffus, bildwache, naturwerk, fermentwerk, fotowerk, linkx).

Stack in daily business: Python (FastAPI, Flask), PHP 8.3, Laravel, JavaScript/Node, Bash, Linux (Ubuntu on Hetzner), MariaDB/PostgreSQL, nginx, Cloudflare, Anthropic API, Gemini API, OpenAI API, ElevenLabs, Vapi, Replicate, Whisper, Piper TTS, Etsy API, Meta Graph API, Stripe.

Business model: "License + Service" — You receive the source code on a one-time license and can host it yourself. Optional maintenance and support contract included. No subscription trap, no vendor lock-ins.

I work remotely from Münsterland for clients throughout the DACH region. Initial consultation to clarify scope before every order.

Industry field of expertise

Languages

German
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

Die Netzhandwerker
Owner – IT Manufactory for Digital and Sensor Technology
SOFTWARE PUBLISHING
April 2026 - May 2026 (1 month)
Gronau, Germany
Independent IT manufactory with a focus on remote maintenance, software development, AI integration, and sensor technology.

Service Spectrum:
- IT remote maintenance and system support (Linux/Windows, VPN, WireGuard, Monitoring)
- Web development (PHP 8.x, Laravel, JavaScript, custom deploy gateway, Cloudflare, Hetzner)
- AI integration (Anthropic Claude, Gemini, Vapi voice bots, ElevenLabs, RAG, Chatbots)
- Sensor technology and IoT (hardware monitoring, data retrieval scripts, analysis)
- Domain and trademark monitoring (DPMA, EUIPO, Espacenet via Google Search Grounding)
- OKAYPLAY audio advertising platform (Laravel, voice generation, TextSync, Deepgram)
- Newsletter engines and automated research pipelines

In-house products in live operation:
- OKAYPLAY (SaaS for audio advertising)
- Voice agent for telephony (Vapi, easybell SIP, ElevenLabs)
- Order and trademark monitoring (nationwide tender and IP expiration monitoring)
- FINN chatbot for customer communication

Technologies: PHP, Python, JavaScript, Laravel, MariaDB, SQLite, nginx, Caddy, Linux (Ubuntu/Debian), Cloudflare, Hetzner Cloud, Gemini API, Anthropic API, Git/Gitea, HMAC-Auth, Webhooks.

Working method: written, strong documentation, agent-assisted. Delivery based on clear scopes, reports as PDF, fast response times.
Robert (Die Netzhandwerker)
Robert — AI Voice Companion for the Elderly (Concept, Architecture, Prototype)
January 2026 - Today (5 months)
Voice-controlled AI companion for seniors with an EU-First architecture: local edge device with Whisper.cpp, Piper TTS, and SQLite, pseudonymization layer, and Anthropic Claude on AWS Bedrock Frankfurt (Zero Data Retention). Pilot planned for summer 2026. DiPA application with BfArM ongoing.
Anthropic Python GDPR Whisper AWS Bedrock
werk-Familie (Die Netzhandwerker)
Sub-Brands Network "werk-Family" (Architect, Developer, Operations)
January 2025 - Today (1 year and 5 months)
Eight thematic sub-brands under the umbrella of the Netzhandwerker manufactory on a shared PHP codebase: spuerwerk (sensor technology), formwerk (websites with module system), diffus (AI image generation, 12 service modes), bildwache (image protection and reverse image monitoring), naturwerk (nature photography and print-on-demand), fermentwerk (fermentation), fotowerk (photography), linkx (link management).
PHP MySQL/MariaDB SEO Cloudflare Brand Management