Henning (Bsc digitale medien) P.

Backend Systems Development

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Berlin, Germany

Experience

Nov 2017 - Jul 2023
5 years 9 months
London, United Kingdom

Backend Systems Development

Deutsche Bank/DWS/Morgenfund

  • Developed backend systems for the DWS Investment App, a white-label investment solution (robo-advisor), and an investment solution for institutional clients.
  • Java 8-17, Kotlin, Spring Boot, Spring MVC, OpenAPI 3.0, JPA, JDBI, Oracle, Hazelcast, JXLS, Apache POI, Apache PDFBox, Apache Kafka & Avro, Active MQ, Elasticsearch, React Native, Spock Test, IntelliJ IDEA, Kubernetes, Helm, Microservices/Netflix-Stack, TeamCity, Splunk.
  • Kanban team, continuous integration.
  • Migrated existing applications from Deutsche Bank's private cloud environment to Azure as part of a carve-out.
Aug 2016 - Sep 2016
2 months
Berlin, Germany

Development of a property recommendation system

Immobilienscout24

  • Developed a property recommendation system for the homepage.
  • Java 11, Spring Boot, Spring MVC, AWS (EC2, CloudFormation, DynamoDB, Elasticache/Redis, SNS/SQS).
  • Kanban team, continuous deployment.
Mar 2016 - Jul 2016
5 months
Berlin, Germany

Worked in the Data Engineering team

Immobilienscout24

  • Enhanced a tool for defining data pipelines.
  • Java, Data Pipeline, Spark, S3.
  • Kanban team.
Oct 2015 - Feb 2016
5 months
Berlin, Germany

Development of a cross-company tracking system

Immobilienscout24

  • Developed a cross-company tracking system for the Scout24 group.
  • Java 11, Spring Boot, Spring MVC, AWS (EC2, Kinesis, Redshift, S3, CloudFormation, DynamoDB, RDS/Aurora, Elasticache, SQS).
  • Git, TeamCity.
  • Scrum team, continuous deployment.
Apr 2015 - Sep 2015
6 months
Berlin, Germany

Development of recommendation systems

Immobilienscout24

  • Developed recommendation systems and data-driven products.
  • Designed and developed a system that can determine in a fraction of a second, while listing a property, how many search-alert emails the listing would appear in, and a system for demand quantification for properties.
  • Scala 2.11, Play 2.4, Elasticsearch, Apache Spark, Hadoop/HDFS, Git, TeamCity, Graphite/Grafana.
  • Scrum team, continuous deployment.
Nov 2013 - Aug 2014
10 months
Berlin, Germany

Backend Systems Development

Myvideo

  • Developed backend systems for the Myvideo video platform.
  • Java 7, Spring Core, REST, Contract-First, JAX-RS, Apache CXF, Spring Web, Ehcache, JPA 2, Hibernate, Solr, Redis, Riak, PostgreSQL, Groovy/Spock Test, Maven, Jenkins CI, IntelliJ IDEA, Checkstyle, FindBugs, Tomcat 7.
  • Scrum team, Continuous Integration.
Apr 2013 - Sep 2013
6 months
Frankfurt am Main, Germany

Backend Systems Development

Deutsche Telekom

  • Developed backend systems for the smart home environment.
  • Java 7, Spring Core, Spring Web, REST, JSON/Jackson, Activiti, MySQL, JUnit, Groovy, Spock Test, Mockito, Spring Test, Maven, Nexus, Jenkins CI, IntelliJ IDEA, Tomcat 7.
  • Kanban team, Continuous Integration.
Nov 2012 - Mar 2013
5 months
Darmstadt, Germany

Architecture and Development of a Monitoring System

Bisnode Informatics

  • Architected and developed a system for monitoring and providing change information on company data.
  • Java 6, Spring Core, REST/JAX-RS, Apache CXF, OSGi, Apache Felix, Apache Camel, MySQL, Liquibase, JUnit, Spring Test, Maven, Artifactory, Jenkins CI, Eclipse.
  • Scrum team, Continuous Integration.
Jul 2012 - Sep 2012
3 months
Darmstadt, Germany

Enhancement of an Administration Application

Bisnode Informatics

  • Enhanced an administration application for customer data and permissions for D&B Germany.
  • JSF, Primefaces, Spring Core, SOAP, Apache CXF, LDAP, jQuery, Maven, Eclipse, Tomcat 6, Eclipse.
May 2012 - Jun 2012
2 months
Darmstadt, Germany

Enhancement of a Company Address Shop

Bisnode Informatics

  • Enhanced and made a company address shop CI-compliant for D&B Germany.
  • Grails 1.4, Spring Core, SOAP, Apache CXF, JPA, Hibernate, MySQL, jQuery, Maven, Eclipse, Tomcat 6.
Jan 2012 - Mar 2013
1 year 3 months
Berlin, Germany

Development of an event and invitation management system

Ontopofthin.gs UG

  • Design (user interviews & paper prototyping), software architecture based on the DCI pattern and backend development.
  • Implementation of the deployment pipeline (Jenkins/Pipeline plugin).
  • Integration of various web services (e.g. Google Contacts, Exchange Server, SMS gateway).
  • Scala 2.9/2.10, Spring Core, REST/JAX-RS, Apache CXF, Contract-First (WADL/WSDL), PostgreSQL, Liquibase, Hibernate, Tapestry 5, SASS, SubEtha SMTP, Scala Test, Spring Test, Mockito, H2 DB, Maven, Artifactory, Jenkins CI, IntelliJ IDEA, Tomcat 7.
  • Continuous Integration.
Jul 2011 - Apr 2012
10 months
Berlin, Germany

Further development of the translation management framework

Andrä AG

  • Further development of the Ontram+ translation management framework and related components.
  • JBoss Seam, JSF, Richfaces, Hibernate, MySQL, Oracle, Liquibase, jQuery, JUnit, DbUnit, Ant, Eclipse, Tomcat 6, Jenkins CI, Eclipse.
  • Scrum team, Continuous Integration.
Sep 2009 - Jun 2011
1 year 10 months
Darmstadt, Germany

Architecture and lead development of a process automation

Bisnode Informatics

  • Architecture and lead development of an in-house solution for process automation with workflows and heterogeneous data sources.
  • Java 6, Spring Core, Spring Aspects, JPA, Hibernate, JTA, jBPM 4.4, Tapestry 5.2, Spring WS, Eclipse, Maven, Jenkins CI, Jetty, Tomcat 6, MS SQL Server, MySQL, JUnit, Spring Test, Eclipse.
  • Continuous Integration.
Apr 2009 - Aug 2009
5 months
Darmstadt, Germany

Architecture and lead development of a company address shop

Bisnode Informatics

  • Architecture and lead development of a company address shop for D&B Germany.
  • Java 6, Spring Core, Spring Aspects, JPA, Hibernate, Tapestry 5, AJAX (Scriptaculous, Prototype), Eclipse, Maven, Jetty, Tomcat 6, MySQL, Boolware, JUnit, Eclipse.
Jan 2009 - Feb 2009
2 months
Berlin, Germany

GUI design and implementation of a business system prototype

Deutsche Post IT Services

  • GUI design with mock-ups, coordination with the business side and programmatic implementation of the web component.
  • Java 5, JPA, Hibernate 3, Spring Core, PostgreSQL, Struts 1.3, AJAX (Prototype/Scriptaculous), Maven, Checkstyle, JUnit, Eclipse.
  • Scrum team.
Aug 2008 - Dec 2008
5 months
Berlin, Germany

Development of Java and PHP components

Maris Consulting

  • Development of Java and PHP components in a Teamsite environment for Bayer Schering Pharma AG.
  • Java 1.4/5, Restlet API, Spring, Hibernate, JPA, JDBC, PHP 5, Zend Framework, PHPUnit.
Jan 2008 - Aug 2008
8 months
Berlin, Germany

Re-engineering of a web-based sales management system

Win.rar

  • Porting and further development of two existing, technically obsolete business systems.
  • Java 6, MySQL, Spring Core, JPA, JTA, Hibernate 3, Tapestry 5, iText, AJAX (Prototype/Scriptaculous), Jboss/Tomcat, Ant, Eclipse.
Jun 2007 - Oct 2007
5 months
Hamburg, Germany

Development of a social shopping platform

Shoppero.com

  • Redesign of the backend to implement transactions and avoid SQL injection.
  • Design and implementation of the email notification system.
  • PHP 5, Smarty, MySQL, Amazon EC2, SQS, PHPUnit, Zend Studio.
Jun 2006 - Jun 2008
2 years 1 month
Gütersloh, Germany

Further development of a customer loyalty system

Arvato Systems

  • Defined specifications with the client, implemented, tested, and rolled out various extensions and new components within the heterogeneous system that has evolved over 15 years and is used for direct marketing in major European countries.
  • Project for Sony BMG European Services, Gütersloh/Munich.
  • J2EE, Spring Core, Hibernate 3, Struts 1.x, Oracle, JAX-WS, JAXB, JAX-RS, JSF, XSLT, JasperReports, JBoss, AJAX (Prototype/Scriptaculous), Ant, Eclipse.
  • Partially in a permanent position.
Oct 2005 - Dec 2007
2 years 3 months
Gütersloh, Germany

Development of a new RSS statistics platform

Arvato Systems

  • Development of a new RSS statistics platform for Mediafed Ltd., London.
  • Co-design and later further development of the distributed architecture.
  • Solely responsible for development, testing, and rollout at the client; iterative enhancements.
  • J2EE, Spring Core, Struts, Servlets, RMI, MySQL, Tomcat, Ant, Eclipse.
  • Partially in a permanent position.

Skills

Methods & Techniques

  • Object-oriented Software Design And Implementation
  • Design Patterns
  • Test Driven Development
  • Scrum
  • Kanban
  • Continuous Integration & Deployment
  • Infrastructure As Code

Programming

  • Java (+++)
  • Groovy (++ )
  • Scala (++ )
  • Kotlin (+)
  • Php (+)
  • C# (+)
  • Lambdas
  • Futures & Asynchronous Programming (Scala, Java, Groovy)

Dbms, Storage, Caching, Search

  • Elasticsearch (++ )
  • Postgresql (++ )
  • Mysql (++ )
  • Ms Sql (++ )
  • H2 Db (++ )
  • Oracle (++ )
  • Redis (+)
  • Couchdb (+)
  • Liquibase (+++)
  • Flyway (++ )
  • Hibernate Search (++ )
  • Solr (+)
  • Memcached (+)
  • Ehcache (++ )
  • Dynamodb (++ )
  • Cassandra (+)
  • Aurora (+)
  • S3 (++ )
  • Hazelcast (++ )

Orm, Tx

  • Jpa 2.0 (+++)
  • Hibernate (+++)
  • Jta (++ )
  • Jdbi (++ )
  • Slick 3.0 (+)

Big Data

  • Spark 1.4-2.0 (++ )
  • Hadoop/yarn (+)
  • Redshift (+)

Ioc/dependency Injection, Aop

  • Spring Core (++ )
  • Macwire (+)
  • Guice (+)
  • Spring Boot (++ )
  • Spring Aspects (++ )
  • Aspectj (+)

Bpm, Workflows, Streaming, Messaging

  • Activiti (++ )
  • Jbpm 4.x (++ )
  • Data Pipeline (++ )
  • Kinesis (++ )
  • Sns/sqs (++ )
  • Apache Kafka (++ )
  • Apache Avro (+)
  • Active Mq (+)

Mvc/web Frameworks

  • Spring Mvc (+++)
  • Play Framework (++ )
  • Tapestry 5 (+++)
  • Wicket (+)
  • Struts 1.x (+++)
  • Jsf (++ )
  • Jboss Seam (++ )
  • Servlet Api (+++)

Web, Soc

  • Html (++ )
  • Css (+)
  • Jsp (++ )
  • Xslt (++ )
  • Velocity (++ )
  • Javascript (+)
  • React (+)
  • Typescript(+)
  • Jquery (+)
  • Prototype/scriptaculous (+)
  • Sass (++ )

Soa, Rpc

  • Json (+++)
  • Rest (+++)
  • Openapi/swagger (++ )
  • Soap (++ )
  • Spring Ws (++ )
  • Jax-ws (++ )
  • Jaxb (++ )
  • Jax-rs (++ )
  • Xml/xpath/xsd (++ )
  • Restlet Api (++ )
  • Feign (++ )
  • Soapui (+)
  • Contract First

IAM

  • Jwt (++ )
  • Keycloak (++ )
  • X509 & Mtls (++ )

Test, Mock

  • Spock Test (+++)
  • Specs2 (++ )
  • Mockito (++ )
  • Junit (++ )
  • Cobertura/jacoco Coverage (++ )
  • Spring Test (++ )
  • Scala Test (++ )
  • Dbunit (++ )
  • Selenium (+)
  • Testng (+)
  • Powermock (+)

Infrastructure As Code/container/cloud

  • Ec2 (++ )
  • Ecs (+)
  • Cloudformation (++ )
  • Docker (+)
  • Kubernetes/openshift (++ )
  • Helm (++ )

Ide & Build

  • Intellij Idea (++ )
  • Gradle (++ )
  • Sbt (++ )
  • Maven (++ )
  • Eclipse (+)
  • Ant (++ )
  • Artifactory (++ )
  • Jenkins Ci (++ )
  • Teamcity (++ )
  • Checkstyle (++ )
  • Scalastyle (+)
  • Findbugs (+)

Scm, Teamware & Miscellaneous

  • Git (& Github)
  • Mercurial
  • Svn
  • Cvs
  • Jira
  • Balsamiq Mockups

Languages

German
Native
English
Advanced

Education

Feb 2005 - Jul 2005

University of Otago

Dunedin, New Zealand

Oct 2002 - Sep 2005

University of Bremen

BSc Digital Media · Digital Media · Bremen, Germany · Very good (1.4)

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