Viktor Hartlieb · IT Services

IT Solutions.
Tailored for You.

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

Business Central
E-Invoicing
Enterprise AI
Fine-Tuning
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
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
Workspace & Playwright
Workspace Picker Workspace picker, Playwright visual testing, multi-repo management
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
KI Fine-Tuning

On-Premise · Your Data · Your Model

AI Fine-Tuning

Your knowledge. Your model. Local.

Fine-tuning AI models with your company data — LoRA/QLoRA training on proven open-source models. The result runs locally on your hardware, with no cloud dependency.

  • LoRA/QLoRA fine-tuning on Gemma, Llama, Mistral & more
  • Company data as training base (documents, code, processes)
  • Business Central: train on AL code, standard objects, extensions
  • Quantised model (GGUF) — runs via OLLAMA on-premise
  • No cloud subscription — one-off or project-based

Who is it for?

ERP Houses & BC Partners An AI model that "natively" understands Business Central — AL code, standard, extensions.
Companies with Domain Knowledge Train company-specific knowledge into a local model — GDPR-compliant.
IT Service Providers Create smaller, specialised models for your clients — on-premise or hosted.
Training Monitor
Training Monitor LoRA Training Monitor — real-time metrics: loss, validation, throughput
LoRA / QLoRA GDPR-compliant Runs on Your Hardware
Service Scope
from 8 day rates
1
Data Analysis & Preparation Which data is suitable for training? Quality check, cleansing and formatting
2
Training & Tuning LoRA/QLoRA fine-tuning with supervised training, validation and hyperparameter optimisation
3
Quantisation & Deployment GGUF export and setup in OLLAMA on your hardware or server
4
Evaluation & Optimisation Quality review, benchmark against base model and fine-adjustment as needed
Project-based — scope depends on data volume, model size and desired specialisation
Discuss fine-tuning
Viktor Hartlieb

Contact

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

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