Technology
The tools we work with. Open source where possible, always documented, and chosen so that you never depend on a single vendor.
Virtualisation & servers
- Proxmox VE and Proxmox Backup Server
- Debian GNU/Linux
- ZFS
- Docker and Docker Compose
- Traefik as reverse proxy with automatic TLS certificates
Network & security
- OPNsense firewalls, VPN and site-to-site links
- UniFi networks and Wi-Fi
- VLAN segmentation
- Multi-factor authentication, password vaults, GPG
- Monitoring with Zabbix, Grafana and InfluxDB
Identity & workplace
- Samba Active Directory and group policies
- Windows and Linux workstations, automated provisioning
- Microsoft 365 and Entra ID where customers use it
- Printer and scanner fleets
Collaboration & communication
- Nextcloud with Talk, calendar and contacts
- Mail servers, spam and phishing protection, archiving
- Video conferencing on your own infrastructure
Business applications
- ERP systems, including Firebird-based ones
- Shopware 6 web shops and custom extensions
- Document management with automatic classification
- HR management, time tracking and payroll interfaces
- Production: machine connectivity (Modbus, S7), shop-floor data capture, time series with InfluxDB and Grafana
- Exports to DATEV and accounting, e-invoicing
Development
- Python with FastAPI
- TypeScript, React and Next.js for web applications
- Kotlin for Android apps
- PostgreSQL, MariaDB, Firebird
- EDI and AS2, REST and SOAP interfaces
- Git, automated tests and deployments
Artificial intelligence
- Local open-weight models with Ollama on your own hardware
- European, GDPR-compliant model providers
- Knowledge bases with retrieval (RAG) over internal documents
- Document recognition, classification and extraction
- Speech to text, assistants in chat tools
- Agents with tightly scoped permissions and logging