Viktor Hartlieb · IT Services

IT Solutions.
Tailored for You.

Professional IT services for your business — from ERP development to Enterprise AI.

ERP
E-Rechnung
AI
Code
Viktor Hartlieb

About Me

Viktor Hartlieb

12+ years enterprise developer — freelance application developer specialising in ERP and AI solutions.

Prompt Engineering

Specialist & Trainer

AI Platform

Development & Agents

Microsoft Dynamics 365 Business Central

WebApps AddIns Upgrades Report Design WebServices

Services

Business Central

Microsoft Dynamics 365

Business Central

Microsoft Dynamics 365 — AL Development & AI Integration

Custom extensions, operational data capture and AI training for Microsoft Dynamics 365 Business Central.

  • AL Development (Extensions & Customizing)
  • Operational Data Capture
  • AI Training & Prompting
  • Upgrades C/AL → AL
Business Central Dashboard
Rollencenter Custom Role Center with time tracking, actions and activity overview
Get in touch
XRechnung / ZUGFeRD

DE / EU Standard

XRechnung / ZUGFeRD

Electronic Invoicing to DE/EU Standard

Validator with automatic audit report and seamless integration into existing ERP and CRM systems.

  • Validator with Audit Report
  • ERP/CRM Integration
  • German & EU Standards
  • Automated Processing
XRechnung Validator
Validator Drag & drop upload or paste XML directly — UBL, CII, ZUGFeRD, Factur-X
Rechnungsdaten Viewer
Daten-Viewer Structured view of all invoice data — issuer, line items, attachments
Validierungsergebnis
Ergebnis Validation against KoSIT audit tool — instant ACCEPTED or detailed error report
Service Scope
4–6 day rates
1
Needs Analysis & Consulting Analysis of your existing invoicing processes and ERP/CRM landscape
2
Setup & ERP/CRM Integration Installation of the validator and integration into your existing system
3
Customisation Adaptation to your specific invoice formats, workflows and validation rules
4
Testing & Go-Live Validation with your real data, sign-off and production deployment
Setup fee + customisation — scope depends on the complexity of your ERP/CRM landscape
Get in touch
viavendo.ai

Enterprise AI

viavendo.ai

ENTERPRISE AI — Multi-Agent Platform

As co-founder, I bring viavendo.ai to your business: the multi-agent platform for complex AI projects at enterprise scale.

  • Chatbots on websites & customer portals
  • Voice & phone bots in customer service
  • Sales agents for lead generation
  • Fully automated agent-to-agent communication
  • Governance, audit trail & human oversight

Who is it for?

Trainers & Coaches Build your own AI agents — skills profiles, negotiation simulations, adaptive learning paths.
Sales Teams AI assistance in real customer conversations. Transfer learning from training room to daily sales.
Enterprises Fully automated agents for customer service, acquisition and internal processes.

Simple Chat

A simple solution to use AI locally — without losing control over your data.

  • Rephrase & optimise emails
  • Build a private knowledge base
  • Product & marketing copy
  • Email agents for automatic replies
  • Employees get their own accounts
viavendo.ai App
App Multi-agent platform with chat, orchestration and live dashboards
Discover viavendo.ai
KI Web Code Online

Enterprise · SelfHosted · Web IDE

KI Web Code Online

Use your own AI subscription. No third-party access.

Web-based AI development environment using your own AI subscription — Claude Code CLI, GitHub Copilot and OLLAMA directly in the browser.

  • Claude Code CLI & GitHub Copilot CLI
  • OLLAMA (local AI models)
  • Parallel sessions with orchestration
  • Image generation (FLUX/BFL)
  • Git management & deployment
Code on iPhone / iPad Deploy Docker, Websites, Apps This Website made on iPhone on the Go!

Who is it for?

Freelancers & Agencies All Git repos, AI tools and deployments bundled in one interface. From anywhere.
Companies with own IT Self-hosted on your own infrastructure. Your API keys. No data shared with third parties.
Developers on the Go Full development environment on iPhone & iPad. Write, review, and deploy code.
Insights Dashboard
Insights Dashboard Real-time metrics: cost, tokens, cache efficiency — per session and model
Session Analytics
Session Analytics All sessions at a glance: turns, cost, runtime — live updated
AI Chat & Orchestration
AI Orchestration AI chat with Titan orchestration: multi-agent, constellation map, projects
Licence fee
€10 / month per user
Optional: Support & Updates
Standard
€300 / year
2nd level support + updates for standard version
Individual
€5,000 / year
2nd level support + updates for custom solution
Premium
€10,000 / year
1st level support + updates, depending on customisation level
All prices excl. VAT — setup billed separately based on effort
Your Project
from 12 day rates
1
Needs Analysis Together we identify your needs — which tools, which teams, which workflows
2
Instance Setup Development environment setup based on the number of users and projects
3
AI Model Configuration OLLAMA, Claude, Copilot — set up local and cloud models to your requirements
4
Git Management & Access Control Git system setup with roles, permissions and deployment pipelines
5
Team Training Hands-on training for your developers — from first prompt to productive use
6
Image Generation & Integrations Set up FLUX/BFL for your shop, approval workflows and external system integration
Joint needs assessment — scope and duration tailored to your requirements
Get in touch
App Entwicklung

Example: VeloBahn — Bike-friendly travel planning

App Development

Custom Apps — from idea to app store

We create and design your own app at enterprise level. From first sketch through UX design to finished product — everything from a single source.

  • Progressive Web Apps (PWA) for iOS, Android & Desktop
  • Native app experience without app store dependency
  • API integration into existing systems (ERP, CRM, databases)
  • Responsive design — optimised for every device
  • Self-hosted on your infrastructure — full data control
iOS & Android Offline-capable Enterprise Ready Your Branding
VeloBahn Suche
Suche Intuitive search with autocomplete, favourites and smart time defaults
VeloBahn Ergebnisse
Ergebnisse Real-time results with accessibility, bike transport and comfort check-in
VeloBahn Detail
Detail Detail view with stopovers, train type and bicycle space information
Discuss your project
KI & Automation

Self-Hosted · GDPR-compliant

AI & Automation

Want to automate? We set it up.

Local AI models, workflow automation and intelligent agents — all on your own infrastructure. No data shared with third parties, full control.

  • n8n — workflow automation (self-hosted)
  • OLLAMA — local AI models without cloud dependency
  • RAG pipelines — make company knowledge searchable
  • Email automation — intelligent sending & reply agents
  • Image generation — FLUX/BFL for shop, marketing & approval workflows
  • AI agents — automated processes with local models

Who is it for?

Mid-size & SMEs Deploy AI and automation without an IT department. We set everything up and train your team.
Companies with own IT Self-hosted on your infrastructure. GDPR-compliant. Integration into existing systems.
Agencies & Shops Automated image generation, email workflows and content creation for your shop.
Service Scope
from 5 day rates
1
Needs Analysis Which processes can be meaningfully automated? Joint assessment
2
Setup & Installation Deploy n8n, OLLAMA and other tools on your infrastructure
3
Workflows & Integration Build automations and connect them to existing systems (ERP, CRM, email)
4
Training & Handover Your team learns to build their own workflows and use the tools productively
Setup + training — scope depends on the number of workflows and systems
Discuss automation

Contact

Interested in working together? I look forward to hearing from you.

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