Timeline

Jobs and Studies

Now
2023

Co-Founder / CEO

steva. GmbH
steva.digital

IT service provider, consulting, software development

2023
2022

Head of Software Engineering / Software Architect

ASS Athletic Sport Sponsering GmbH
ichbindeinauto.de

In-house Operational Systems

2022
2018

Head of Software Engineering / Software Architect

cobago GmbH
www.cobago.de

Service Lifecycle Management System (SIX)
Kotlin, Spring, Vaadin, Xamarin
Process: Scrum/Kanban

2018
2017

Software Architect / Engineer

Freelancer

2017
2016

Senior Software Architect/Developer

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

2017
2016

IT Consultant
Self-employed

voipinion UG (haftungsbeschränkt)

Communication systems, Unified Communication, VoIP, Embedded Systems, Social Networks

2016

Elixir / Phoenix

Started to develop Elixir / Phoenix apps and became an Elixir evangelist

2016
2006

Senior Software Architect / Developer
Team-Lead

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

2013

Ruby / Ruby on Rails

Started to develop Ruby / Ruby on Rails apps and became a Ruby evangelist

2006
2004

Software Architect / Developer
Self-employed

BueroByte GbR

CRM/ERP systems
E-Learning systems

Technologies: Java/Swing/SQL-Database/Realtime-Networking

2004

Software Architect / Developer

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

2003
1999

Software Architect / Developer

Xtend GmbH

CRM/ERP systems (Xflow)

Technologies: C++/MFC/Win32/Java/SQL-Database

1999

Java SE/EE

A professional Java SE/EE developer since 1999

00s
90s

Study of computer science

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

90s

Study of physics

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

90s
80s

Become a Computer / Electronics Nerd

Amiga
C64
ZX81
Philips Electronic Kits
Fischer Technik