Alexander Hilberer

Data & AI Systems Engineer

Saarland, Germany

I build data and AI systems with a focus on traceable data flows, clear access boundaries, and long-term evolution.

About

I build data and AI solutions at the intersection of architecture, operations, and governance. What matters to me is not only that a system works, but that its data flows, access model, and future evolution are understandable from the start.

I learn new technologies best by building with them, in my own projects and through self-hosting. That lets me evaluate not only what a tool promises, but also how it integrates and where its boundaries lie. Swimming and hiking provide the balance away from the screen.

  • Design data flows and operating paths so changes and failures remain visible.
  • Treat access and governance as architecture decisions.
  • Use new technology where it improves a concrete requirement.
Education
M.Sc. Artificial Intelligence & Data Science · Trier University of Applied Sciences 2022 - 2025
B.Sc. Business Informatics · Trier University of Applied Sciences 2018 - 2022

Projects

These projects show how I implement enterprise-oriented data and AI architectures from integration through to operations. The focus is on clear data flows, controlled access, repeatable delivery, and hands-on exploration of new technologies.

On-Prem Data Lakehouse

Self-hosted

Enterprise-oriented, self-hosted single-host lakehouse for retail data. It combines batch processing, open table formats, role-based data access, and analytics in a local environment.

  • Modelled LDAP roles and Ranger policies for controlled Trino access.
  • Orchestrated bronze, silver, and gold transformations with Airflow and Spark, including data-quality checks.
  • Provided curated data access through Trino, Cube, and Superset.
  • Apache Spark
  • Apache Iceberg
  • Apache Airflow
  • Trino
  • Apache Ranger
Open repository ->

On-Prem AgenticBI

Self-hosted

Local agentic BI environment for controlled queries on modelled data. It shows how chat agents access modelled data through a semantic layer and which identity and authorization steps this requires.

  • Connected LDAP, Authentik OIDC/OAuth, and a dedicated Cube MCP gateway.
  • Bound MCP queries to the signed-in identity and implemented role-based PII masking for this path.
  • Kept agent queries and dashboard access intentionally separate; the dashboard uses a shared service identity.
  • LibreChat
  • Authentik
  • Cube
  • Apache Superset
  • Azure AI Foundry
Open repository ->

On-Prem Machine Learning Operations

Self-hosted

Local MLOps workflow for a classification scenario. It combines training, tracking, batch inference, and monitoring to make model lifecycles tangible.

  • Connected Airflow DAGs for batch inference, monitoring, and retraining with MLflow tracking.
  • Implemented repeatable evaluations for classification metrics, feature drift, and SHAP explanations.
  • Compared challenger models through cross-validation and recorded promotion decisions.
  • Apache Airflow
  • MLflow
  • PostgreSQL
  • SHAP
  • scikit-learn
Open repository ->

Fabric Financial Analytics Platform

Azure

Reproducible Fabric analytics flow for financial transactions. It focuses on infrastructure as code, medallion processing, and the publication of analytics artefacts.

  • Provisioned Azure base infrastructure and a Fabric workspace with Terraform.
  • Published a medallion pipeline, semantic model, and Power BI report reproducibly.
  • Implemented the local AI chat layer and real-time extension as separate, optional modules.
  • Microsoft Fabric
  • Terraform
  • fabric-cicd
  • Power BI
  • Open WebUI
Open repository ->

Experience

  • BI & Data Science Consultant - PREVISIONZ
    10/2025 - PresentSaarbrücken, Germany

    Designed an agentic AI solution to simulate and analyse sales data. Developed an end-to-end MLOps workflow in Azure Machine Learning for customer churn classification. Implemented a recommendation system for banking products using hybrid collaborative-filtering methods. Supported the migration from Azure Synapse Analytics to Microsoft Fabric.

  • Working Student, Data Science - PREVISIONZ
    01/2023 - 10/2025Saarbrücken, Germany

    Analysed and compared MLOps lifecycles across Azure, Google Cloud Platform, and AWS. Designed and implemented an on-premises lakehouse architecture. Evaluated and integrated Microsoft Fabric into the central technology portfolio.

  • Bachelor's Thesis & Working Student, IT - Neodigital Versicherung AG
    12/2021 - 12/2022Neunkirchen, Germany

    Developed and evaluated linear models to estimate vehicle fuel consumption from simple sensor data. Then contributed to software development projects with a focus on front-end engineering.

  • IT Development Internship · Telematics - Neodigital Versicherung AG
    08/2021 - 11/2021Neunkirchen, Germany

    Evaluated suitable NoSQL database solutions. Set up a Cassandra cluster across multiple Docker containers. Developed a data model for storing vehicle speed data. Integrated Cassandra with the existing backend architecture.

Credentials

Current certifications complement my practical work.

Professional Machine Learning EngineerGCP MLE
Machine Learning Operations Engineer AssociateAI-300
Azure AI Apps and Agents Developer AssociateAI-103
Additional certifications
Fabric Data Engineer AssociateDP-700
Fabric Analytics Engineer AssociateDP-600
Azure Administrator AssociateAZ-104
Azure FundamentalsAZ-900
Retired certifications
Azure Data Scientist AssociateDP-100
Azure AI Engineer AssociateAI-102

Contact

If you would like to connect or simply get in touch, I would be glad to hear from you.