App and web developer from Cologne
PROFESSIONAL AND RELIABLE SOFTWARE DEVELOPMENT
My name is Oliver Kießler and I am a freelance app and web developer from Cologne specialized in apps (iOS, Android, Ionic, React Native) , secure web applications (Angular, React) and API backend’s (Ruby on Rails, NodeJS, Serverless ) .
As a full-stack developer (with back-end focus) and experienced IT consultant, I independently handle projects / assignments on a freelance basis (remote / home office) or support your team / company directly on site. Furthermore, consulting and training / coaching on site or by phone or Skype is possible.
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