Consultant, Architect & Node.js Developer / DevOps & Web3 Enthusiast

2/2020 – 7/2020

- AutoScout24 carve-out: Migrating the vertical’s 500+ multi-account infrastructure into a new AWS organization
- Evaluating cost saving potential & reducing EC2 & network traffic costs by >60%

DevOps, Python, Amazon Web Services (AWS)

2/2018 – 1/2020

- Creating a highly scalable decentralized crypto exchange gateway based on Node.js microservices and the BitShares blockchain
- Automating deployments of blockchain daemons on Docker swarms

Blockchain (allg.), DevOps (allg.), Docker, Node.Js, Amazon Web Services (AWS)

3/2016 – 1/2018

- Creating a highly scalable restful Node.js based orchestration API that distributes the requests from all Maxdome clients (web, mobile, OTT) to the backend micro services
- Implementing a Redis based caching layer around generic content and resolving it with used specific content

Technologies: node.js express redis microservices aws-eb mocha sinon chai winston swagger superagent

JavaScript, JavaScript-Frameworks

12/2015 – 2/2016

- Creating proofs of concept & prototypes for a single-page React app of independent components with limited blast radius
- Creating a migration strategy that replaces the previous monolithic Symfony based web portal in multiple iterations with those React components

Technologies: reactjs babeljs mocha chai webpack sass superagent

React (JavaScript library), JavaScript, JavaScript-Frameworks

10/2015 – 12/2015

- Developing features and new components for the various Restify based organize.me micro services
- Landing a few contributions in the swagger-ui project on GitHub

Technologies: node.js restify redis swagger kubernetes amazon-web-services openstack fleet ocr

JavaScript, JavaScript-Frameworks

5/2015 – 9/2015

- Consulting & technical planning
- Project management
- Rapid prototyping using Express

Technologies: node.js express gulp handlebars.js sass

JavaScript, JavaScript-Frameworks

1/2015 – 4/2015

- Developing features and new components for the Symfony based Maxdome web portal
- Migrating the frontend Javascript in CommonJS modules and adding a webpack build process

Technologies: php symfony2 redis twig phpunit jquery webpack sass compass karma-runner

Symfony, Json, CSS (Cascading Style Sheet), PHP, JavaScript-Frameworks, Jquery

5/2014 – 12/2014

- Developing features and new components for the Clojure based web portals web.de, gmx.de, auto-service.de & top.de
- Creating a frontend build process with Grunt and integrating it in the Maven build
- Integrating new ad formats into the portals using United Internet Media’s ad service

Technologies: javascript html5 metalsmith jquery kss clojure jwplayer less gruntjs

HTML5, CSS (Cascading Style Sheet), JavaScript, JavaScript-Frameworks, Jquery

9/2013 – 4/2014

- Migrating the Apache Ofbiz based Lusini marketplace into a Rendr single page app
- Migrating the Solr database to Elasticsearch

Technologies: node.js express rendr elasticsearch mocha chai sinon karma-runner selenium

HTML5, JavaScript, JavaScript-Frameworks

3/2012 – 1/2014

- Complete user interface design
- Developing the Songpier Studio, a Backbone.js based single page, drag & drop administration tool for Songpier, the mobile artist promotion app
- Migrating the Songpier REST API from WCF to Symfony

Technologies: html5 css3 javascript jquery backbone.js requirejs sass compass php symfony2 doctrine mysql

Symfony, HTML5, CSS (Cascading Style Sheet), Backbone.Js, JavaScript, PHP, JavaScript-Frameworks

9/2010 – 6/2012

- Developing a Backbone.js based shopping frontend for an online marketplace with facetted category navigation, product variant selection & single page checkout

Technologies: javascript backbone.js requirejs jquery sass compass apache-ofbiz

HTML5, CSS (Cascading Style Sheet), Backbone.Js, JavaScript, JavaScript-Frameworks

6/2010 – 9/2010

- Developing various comparison calculators for both CHECK24 and partner sites
- Extensive A/B Testing & SEO optimization

Technologies: javascript jquery html5 css3 php zend-framework mysql velocity

Mysql, Zend Framework, HTML5, CSS (Cascading Style Sheet), JavaScript, PHP, JavaScript-Frameworks, Jquery

2/2010 – 6/2010

- Creating an iTunes like, jQuery based single-page music streaming portal
- Developing a Symfony based REST API

Technologies: javascript html5 css3 jquery php symfony2 doctrine mysql red5

Mysql, Symfony, HTML5, CSS (Cascading Style Sheet), JavaScript, PHP, JavaScript-Frameworks, Jquery

9/2009 – 2/2010

- Developing various comparison calculators for both CHECK24 and partner sites
- Creating an internal framework for publishing test winner results
- Extensive A/B Testing & SEO optimization

Technologies: javascript jquery html5 css3 php zend-framework mysql velocity

Mysql, Zend Framework, HTML5, CSS (Cascading Style Sheet), JavaScript, PHP, JavaScript-Frameworks, Jquery

8/2008 – 8/2009

- Developing a Symfony based music streaming portal for newcomers
- Migrating the music streaming platform roccatune into a Symfony app

Technologies: html5 css3 javascript jquery php symfony2 doctrine mysql red5 flash

Mysql, XHTML (Extensible HyperText Markup Language), Symfony, Actionscript, CSS (Cascading Style Sheet), JavaScript, PHP, JavaScript-Frameworks, Jquery

9/2002 – 7/2008

- Conception, development and technical lead for (mainly TYPO3 based) websites und database-driven web applications for numerous B2B and B2C customers
- TYPO3 trainings
- Developing various advertising & promotion websites & raffles
- Systems administration (file- und webservers)
- Developing web- and CD-applications

Technologies: php mysql typo3 linux apache postfix rsync javascript html css flash

Mysql, Postfix, Apache HTTP Server, Typo3, XHTML (Extensible HyperText Markup Language), Zend Framework, Json, Actionscript, CSS (Cascading Style Sheet), Dynamisches HTML, PHP, Jquery