CTO
2013 - PRESENTStartup Compass- Led a team of 4 developers and 2 data-scientists.
- Designed and developed a software hub to automatically collect data from a wide range of data APIs (e.g., Square, Google Analytics, Paypal, Freshbooks, Xero, Highrise).
- Introduced server provisioning for AWS OpsWorks with Chef and Berkshelf.
- Built and administered micro-service infrastructure with independent modules, message queues, and scheduler.
- Introduced Continuous Integration with Jenkins.
Technologies: Mixpanel, StatsD, logentries, RSpec, Jenkins, Berkshelf, Chef, AWS OpsWorks, Resque, Redis, MongoDB, PostgreSQL, RabbitMQ, AngularJS, Ruby on Rails (RoR), Sinatra, RubyCTO
2012 - 2013Quan Digital- Managed MySQL-databases with billions of entries (containing qualitative SEM/SEO keyword-lists in 6 languages).
- Designed and oversaw multiple Hadoop/HBase clusters (3-4 nodes) collecting half a billion new data points per week and running Map/Reduce analyses (containing qualitative search engine visibility data for 6 countries).
- Realized fast data search with HBase data dumps and Lucene indexes.
- Led a team of 10+ developers and product manager.
- Designed and realized product Rankpanel, an open search-visibility analytics tool.
Technologies: Hadoop, HBase, Java, Solr, Apache Lucene, Bash, Zend Framework, PHP, MySQL, LAMPCTO
2006 - 2012Linklift- Grew company to 60+ employees, 5,000+ webmasters (customers), 4+ million € annual turnover, and profitability.
- Designed and developed the software back-end of the Linklift technology platform, a software setup which dealt with half a billion data-points per week (LAMP stack with automated payment-system and API for CMS-plugins).
- Designed, set up, and administrated a webscraping infrastructure, including in-house server-farm and 20+ controllable VDSL-lines with service-API (libraries in PHP and Java), web front-end, and centralized task management.
- Introduced internationalization for 6 languages and 4 currencies (using i.a. gettext, po/mo).
- Led a team of 10+ developers and product manager.
Technologies: Internationalization, Bash, Perl, CMS Structure & Configuration, Joomla, Drupal, WordPress, PHP, MySQL, LAMPPhD Student with Lectureship
2005 - 2006Technical University of Berlin- Organized university courses.
- Lectured 300+ undergraduate students.
- Conducted written and oral exams.
- Led a team of 15 tutors, creating seminars and weekly exercises.
- Researched in modeling object-oriented systems by transformation-systems.
Technologies: Algorithms, Algebra