Versatile Full-Stack, Embedded Systems, and Data Engineering Developer with Leadership Expertise

Maintainance of a elearning platform, develop a tool to fill in thousants of questionaries into an web form automatically. The used technologies where Ruby on Rails and Selenium

Development and maintainace of a telephone system. Set up and lead a team for the development
    of a webshop in Ruby on Rails from ground up. Connecting the webshop to the telephone system, 
    create a billing system and connect to payment providers. Build a solution for slide presentations 
    on our web site by converting DOC, PDF, XLS, PPT files and distribute them to many web clients. Setup a 
    Jitsi conference system and build a webshop for it. Extent the Jitsi mobile App. The used technologies 
    where Ruby on Rails, Capistrano, ISDN, SIP, SMPP, Libreoffice modules, .net, Golang, Python, Nagios, MySQL/MariaDB, 
    Docker, Linux, Nginx, NodeJS, C/C++, PostgreSQL, PM2, VirtualBox, OpenVPN, SIP, Asterisk

Development  of a physical access control mobile App. The used technologies where Android, IOS, Flutter and Firebase.

Support giHAL development, development of a test framwork, debubbing assembler routines. The used technologies where C++ and MySQL

I gave a workshop for Kamailio and developed a fax to pdf converter

We developed a VoiceXML platform in C++ and Java. It ran on Linux, Solaris and Windows systems. Later we extended it to a business PBX for hundrets of end devices. We extended our team in Frankfurt by development team in Kiev, where I was in charge of some development groups. The used technologies where ISDN (BRI and PRI), C/C++, Pthreads, H323, SIP

Maintainance and development of an telephone entertainment plattform, and building a team for expansion. The used technologies where ISDN (BRI and PRI), C/C++, Netware, Linux, Linux Kernel Modules, Mylex RAID, SCSI, SMS

We maintained and extended a behavioral targeting platform. The platform is based on Apache modules written in C and C++. The used technologies where Apache Modules and C/C++

Maintainance of an telephone entertainment plattform. The used technologies where ISDN (BRI and PRI), Netware, Mylex RAID, SCSI, SMS