senn-techsenn-tech
Services

What I build.

Three disciplines, one coherent stack — from the application to the language model to the infrastructure it all runs on.

01 · Apps

Enterprise App Vibecoding

Business-critical applications, AI-assisted and built fast — without sacrificing maintainability or cleanliness. From prototype to production.

Next.jsReactNodeMedusaStripePostgreSQL
  • ›Internal tools: calculators, time tracking, mobile data capture
  • ›E-commerce with Medusa & Stripe, headless architecture
  • ›Dashboards, admin panels, workflow automation with n8n
  • ›Clean data models, real persistence, no fake features
02 · LLM

Corporate LLM Stack

Your own language models on your own hardware. No data sent to external APIs — inference, RAG and voice run under your control, GDPR-compliant.

vLLMOllamallama.cppQdrantOpenWebUIPipecat
  • ›On-prem inference on RTX 5090 with vLLM, Ollama, llama.cpp
  • ›RAG over your documents with Qdrant & OpenWebUI
  • ›Voice agents for the phone with Pipecat & Asterisk
  • ›Automation & agent workflows, integrated into your systems
03 · IT

General IT Solutions

The foundation everything runs on: high-availability infrastructure, security and operations — planned, set up and maintained for the long run.

ProxmoxHetznerLINBITMinIOGraylogCrowdSec
  • ›Virtualization & HA with Proxmox, LINBIT DRBD/LINSTOR
  • ›Hosting on Hetzner & own hardware, MinIO object storage
  • ›Security: firewalling, CrowdSec, monitoring with Graylog
  • ›Mail servers, backups, maintenance and updates
Work

Selected projects.

A cross-section of applications, LLM systems and infrastructure — built and in production.

Enterprise App

Angebots-Kalkulator

B2B quoting and pricing calculator — fast input, clean PDF output.

Next.jsPostgreSQLPDF
Enterprise App

Zeiterfassung & MDE

Mobile time tracking and data capture for field and shop-floor teams.

ReactNodePostgreSQL
Enterprise App

Lernplattform

E-learning platform with courses, progress tracking and analytics.

Next.jsPostgreSQL
Corporate LLM

On-Prem RAG-Assistent

Document assistant on own hardware — sourced answers, no cloud.

vLLMQdrantOpenWebUI
Corporate LLM

Telefon-Voice-Agent

AI phone agent: understands, answers, documents — in real time.

PipecatAsteriskLLM
Enterprise App

Headless Webshop

Headless commerce with Medusa & Stripe and a custom storefront.

MedusaStripeNext.js
IT infrastructure

HA-Cluster

High-availability Proxmox cluster with LINBIT storage and monitoring.

ProxmoxLINBITGraylog
Enterprise App

Workflow-Automatisierung

Business processes automated with n8n — integrations, triggers and AI steps.

n8nWebhooksLLM
IT infrastructure

Self-hosted Mail

Own mail server with Stalwart and webmail — GDPR-compliant, no third parties.

StalwartRoundcubeCaddy