Large Scale Software Development, Machine Learning, Data Mining, Big Data, Statistics, Functional Programming, RESTful Webservices, Location Based Services, Scrum, Continuous Integration, Test Driven Development, Data Visualization Scala, Java, Playframework, Elasticsearch, Spring, Lucene, Solr, Hadoop, Cascading, Maven, Zookeeper, Python, JavaScript, HTML5, Bash, R, Clojure, Apache Tomcat, Jetty, SQL/NoSQL

Chief Technology Officer @ From September 2014 to Present (1 year 4 months) Berlin Area, GermanyGründer / CTO @ Implementierung einer Big Data ready Sofware as a Service Personalization / Recommendation Engine. Technologie: Scala, Akka, Play, Cassandra, AngularJS, D3 From November 2013 to Present (2 years 2 months) Berlin Area, GermanyFreiberuflicher Machine Learning/Software Consultant @ Implementierung einer Recommendation Engine für Zalandos online-Shop (Technical Lead) Technologie: Matrix Factorisierung, Java, Spring, Hadoop, Cascading, MongoDB, Apache Solr From May 2012 to October 2013 (1 year 6 months) Berlin Area, GermanySoftware Engineer @ Implementierung eines browser basierten multi-player Rennspiels durch Wikipedia. Technology: backbone.js, WebSockets, Java, Spring, Jetty, MongoDB From September 2012 to December 2012 (4 months) Berlin Area, GermanyFreiberuflicher Machine Learning/Software Consultant @ Implementierung eines Machine Learning Models zur Erkennung von Betrugsfällen in Zanox's Affiliate Marketing Network. Technologie: Logistische Regression, Hadoop, Hbase, Java, Spring, JavaScript, MongoDB, ExtJS From November 2011 to April 2012 (6 months) Berlin Area, GermanyFreiberuflicher Solr/Lucene Consultant @ Implementation der Search Suggestions für Barcoo's Produktsuche mit Solr/Lucene. Technologie: Solr/Lucene, Java From February 2012 to March 2012 (2 months) Berlin Area, GermanySoftware Developer / Scrum Master @ Implementierung eines Machine Learning Models zur Duplikaterkennung von Places of Interest im Nokia Maps Framework. Technologie: Support Vector Machine, Hadoop, Solr, Java, Spring, JavaScript, Python, Django From January 2011 to October 2011 (10 months) Berlin Area, GermanyFreiberuflicher Software Engineer @ Implementierung einer "Immobilenscout" Kopie für den australischen Markt. Technologie: JavaScript, Java, Spring, Jsp, MongoDB, Lucene/Solr From March 2011 to August 2011 (6 months) Berlin Area, GermanySoftware Developer @ Entwicklung eines Recommender Systems zur Vorhersage von Nutzerpräferenzen für Orte. Technologie: Singulärwertzerlegung, EM Optimierung, Hadoop, Solr, Java, Spring From July 2009 to January 2011 (1 year 7 months) Wissenschaftlicher Mitarbeiter @ Wissenschaftlicher Mitarbeiter From February 2009 to June 2009 (5 months) Diplomand @ Projektarbeit in der Arbeitsgruppe "Quality Analysis & Data Mining", Anfertigen meiner Diplomarbeit From April 2008 to December 2008 (9 months) Studentischer Mitarbeiter @ Entwicklung und Evaluation verschiedener Recommender Systeme From January 2007 to February 2008 (1 year 2 months)

Diplom, Informatik @ Humboldt-Universität zu Berlin From 2002 to 2008 Nebenfach, Chemie @ Humboldt-Universität zu Berlin From 2002 to 2008 Peter Siemen is skilled in: Machine Learning, Data Mining, Recommender Systems, Data Analysis, Java, Python, R, Spring, Hadoop, Lucene, Solr, Location Based Services, Web Services, Clojure, Cloud Computing