Now
2023
2023
Co-Founder / CEO
steva. GmbH
steva.digital
IT service provider, consulting, software development
steva. GmbH
steva.digital
IT service provider, consulting, software development
ASS Athletic Sport Sponsering GmbH
ichbindeinauto.de
In-house Operational Systems
cobago GmbH
www.cobago.de
Service Lifecycle Management System (SIX)
Kotlin, Spring, Vaadin, Xamarin
Process: Scrum/Kanban
Freelancer
STARFACE GmbH
www.starface.de
Software-PBX Systems (STARFACE)
Backend: Java/Groovy/Asterisk/Linux
Frontend: HTML / CSS / JavaScript
Additional Projects: Ruby on Rails
Process: Scrum/Kanban
voipinion UG (haftungsbeschränkt)
Communication systems, Unified Communication, VoIP, Embedded Systems, Social Networks
Started to develop Elixir / Phoenix apps and became an Elixir evangelist
TELCAT MULTICOM GmbH
www.telcat.de
Software-PBX Systems (TELCAT-UC)
Cloud-based Microservice-Architectures
Second Generation:
Architecture: Microservices
Backend: Java / Vertex / Ruby on Rails / Grape / Docker
Frontend: HTML5 / Web-Components / CSS3 / JavaScript
Process: Scrum
First Generation:
Monolith: Java / Spring / Tomcat / Struts / Asterisk
Additional Projects: Ruby on Rails
Started to develop Ruby / Ruby on Rails apps and became a Ruby evangelist
BueroByte GbR
CRM/ERP systems
E-Learning systems
Technologies: Java/Swing/SQL-Database/Realtime-Networking
Lutix GmbH
Client/Server-System to acquire, visualize and analyze measured data (Metix)
Now OpenSource: github.com/conpinion/openmetix
Technologies: Java / Swing / SQL-Database / Realtime-Networking
Xtend GmbH
CRM/ERP systems (Xflow)
Technologies: C++/MFC/Win32/Java/SQL-Database
A professional Java SE/EE developer since 1999
FernUniversität Hagen
www.fernuni-hagen.de
Click to see my courses
Aspect Oriented Programming
Concepts of Imperative Programming
Communication and Computer Networks
Compiler
Computer Systems 1
Computer Systems 2
Component Based Programming
Data Structures
Database Systems
Foundations of Technical Computer Science
Interactive Systems I/II
Introduction to Computer Architecture
Introduction to Human-Computer-Interaction
Introduction to Theoretical Computer Science A
Introduction to Theoretical Computer Science B
Microcomputer Technology
Neuronal Networks
Object Oriented Programming
Operating Systems
Operating Systems and Computer Networks
Programming Internship
Software Engineering I
Software Project Management
Technical Computer Science
Analysis I
Linear Algebra I
Linear Algebra II
Probability Theory 1
Principles of Marketing
Introduction to Operational Economics
Technische Universität Dortmund
www.uni-dortmund.de
Click to see my courses
Physics I for physicists
Physics II for physicists
Experimental excercises for Physicists Part 1
Experimental excercises for Physicists Part 2
Amiga
C64
ZX81
Philips Electronic Kits
Fischer Technik