Stefan Reimers

Data Architect. Software Developer. Author

Curriculum

07/15 - now

CEO / Co-Founder

OneBitAhead GmbH
  • Data Warehouse Consultant for various customers (mainly financials): Design, implement and operate Data Warehouses
  • Analyse Requirements and Build Web based information systems for customers
  • Developer of SCINARIO Low-Code-Platform
  • Developer of CloudCompose platform to host containerized open source tools
01/15 - 07/15

Freelancer

Take a look at the tag cloud to get an idea of my portfolio

06/12 - 12/14

CEO / Co-Founder

koomio / OUTRIGHT Vision GmbH
  • System Design
  • Web Frontend (Seller)
  • Android App
  • Browser Extensions
01/08 - 07/13

Information Manager

WGZ BANK AG
  • DWH System Design
  • Tool Administration
  • Mart Design
  • Universe-/Report-Implementation
  • Project Coordination
03/06 - 12/07

DWH Consultant

Informationsfabrik GmbH
  • ETL Implementation
  • Masterdata-Management
  • Data Mart Design
  • Software Testing
  • Trainings
07/03 - 09/05

Student assistant

DBIS Group, Uni Münster
  • Software Development
  • Software Testing
  • Event / Conference Preparations
  • If you happen to meet me ...

  • I might introduce myself as a generalist who solves challenges in a solution-oriented, open minded way.
    I use any available or useful technology to do so. That said, I have already had the opportunity to gain experience with at least the following:

  • Business Intelligence
  • Data Warehousing
  • IBM DB2 Unix/Host
  • Oracle
  • Microsoft SQL Server
  • MySQL
  • MariaDB
  • PostgreSQL
  • Retrieval Augmented Generation
  • ADAPT
  • Data Vault
  • Entity Relationship Model
  • Star Schema
  • ETL
  • Informatica PowerCenter
  • Cognos
  • Power BI
  • Azure Data Factory
  • Access
  • VBA
  • Talend
  • SAS Base
  • SAS Data Integration Studio
  • SAS DI Administration
  • Business Objects
  • Android
  • Chrome Extension
  • WebExtensions
  • PHP
  • HTML5
  • CSS
  • REST APIs
  • JavaScript
  • TypeScript
  • React
  • Lit
  • Web Components
  • Responsive Design
  • XQuery
  • XSLT
  • SQL
  • NoSQL
  • CouchDB
  • MongoDB
  • Wordpress Plugins
  • Wordpress Themes
  • Progressive Web Apps
  • Smart Home
  • Home Assistant
  • Z-Wave
  • Zigbee
  • Geolocation
  • Retail
  • eCommerce
  • Book reviews
  • Trainings
  • Windows
  • Linux
  • Docker
  • Git
  • Ollama
  • MCP
  • n8n

Data Warehousing

For most of my professional life, I have helped business departments implement their requirements for data analysis as well as regulatory reporting, and turn their data into reliable foundations for decision-making.

I deliberately work as a generalist who brings together business requirements, processes and technology instead of narrowing down to a single product or tool. Over more than twenty years of project experience, I have had the opportunity to work with a wide range of database, ETL and BI technologies - from Oracle, SQL Server, PostgreSQL, DB2, MariaDB/MySQL and Azure Data Factory, Informatica and SAS DI through to reporting with Power BI, Business Objects and Cognos - on premise or in the cloud.

I use this broad toolbox in a solution-oriented way: the focus is always on the architecture that best fits your environment - whether for building new DWH structures, optimising existing ETL workloads or implementing practical reporting and analytics platforms.

My experience helped me when auditing existing data warehouse architectures as well as when onboarding new developers or train developers in Data Vault.

Certificates & Trainings

  • SAS Data Integration Studio 2 - komplexe ETL-Prozesse
  • RiskManager WGZ BANK - Risiko-Controlling mit bankinternen Risikomodellen
  • Datenmanagement und Warehousing mit SAS Data Integration Studio
  • Sas Programmierung I - Grundlagen für ergahrene Programmierer
  • Banking für IT-Fachkräfte (Bankakademie Training)
  • Unix/Linux

Coding

I am convinced that web technologies represent the definitive solution for software development, as they work across platforms and devices, offer enormous availability and scalability, and moreover bring the necessary openness to enable innovations and free oneself from existing dependencies. Here are some of the projects I participated in:
boxworthy.comFor everything on the web worth keeping
koomio.comLocal Commerce Platform
CloudcomposeContainerized Open Source Hosting
KERN UX React KitReact Components for the UX standard for the German administration
github.com/onebitaheadGithub Repositories of OneBitAhead GmbH
github.com/stefanreimers My personal Github Repositories

Writing

Over the past few years I wrote a couple of books and articles for various publishers to share knowledge

Complete List of Books

Selection of German Articles

Selection of Blog Posts

Contact

Stefan Reimers

Stefan Reimers

In der Groll 9a, 45721 Haltern am See

Mail: contact-via-website @ [website-domain]

Please note the Privacy Policy