Henning P. - Software developer specializing in Java, Scala, Kotlin

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Berlin, Germany

Experience

Nov 2017 - Jul 2023

5 years 9 months

London, United Kingdom

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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.
Cloud migration of existing applications from Deutsche Bank’s private cloud to Azure as part of a carve-out.

Aug 2016 - Sep 2016

2 months

Berlin, Germany

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Immobilienscout24

Developed a new 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

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Immobilienscout24

Worked on the Data Engineering team; among other things, enhanced a tool for defining data pipelines.
Java, data pipelines, Spark, S3.
Kanban team.

Oct 2015 - Feb 2016

5 months

Berlin, Germany

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Immobilienscout24

Built 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

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Immobilienscout24

Developed recommendation systems and data-driven products.
Designed and built a system that can determine in fractions of a second how many email alerts a property listing would appear in during listing, and a system to quantify demand 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

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Myvideo

Developed backend systems for the MyVideo 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

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Deutsche Telekom

Developed backend systems in 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

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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

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Bisnode Informatics

Extended an administration app for customer data and permissions for D&B Germany.
JSF, PrimeFaces, Spring Core, SOAP, Apache CXF, LDAP, jQuery, Maven, Eclipse, Tomcat 6.

May 2012 - Jun 2012

2 months

Darmstadt, Germany

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Bisnode Informatics

Enhanced and adapted a corporate address shop for D&B Germany to support continuous integration.
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

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Ontopofthin.gs UG

Built an event and invitation management system.
User interviews & paper prototyping, software architecture using the DCI pattern and backend development, set up the deployment pipeline (Jenkins/Pipeline Plugin), integrated 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, ScalaTest, Spring Test, Mockito, H2 DB, Maven, Artifactory, Jenkins CI, IntelliJ IDEA, Tomcat 7.
Continuous integration.

Jul 2011 - Apr 2012

10 months

Berlin, Germany

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Andrä AG

Enhanced 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.
Scrum team, continuous integration.

Sep 2009 - Jun 2011

1 year 10 months

Darmstadt, Germany

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Bisnode Informatics

Architected and led 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.
Continuous integration.

Apr 2009 - Aug 2009

5 months

Darmstadt, Germany

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Bisnode Informatics

Architected and led development of a corporate 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.

Jan 2009 - Feb 2009

2 months

Berlin, Germany

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Deutsche Post IT Services

Designed and implemented a GUI prototype for a mail center business system.
Created GUI mock-ups, coordinated with stakeholders, and implemented 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

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Maris Consulting

Developed 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

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Win.rar

Re-engineered a web-based sales management system.
Ported and enhanced two 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

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Shoppero.com

Built a social shopping platform.
Redesigned the backend to support transactions and prevent SQL injection, designed & implemented the email notification system.
PHP 5, Smarty, MySQL, Amazon EC2, SQS, PHPUnit, Zend Studio.

Jun 2006 - Jun 2008

2 years 1 month

Gütersloh, Germany

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Arvato Systems

Enhanced a customer loyalty system for Sony BMG European Services in Gütersloh/Munich.
Worked with the client to create specs, implemented, tested, and rolled out various extensions and new components in the 15+ year old heterogeneous system used by direct marketing teams across major European countries.
J2EE, Spring Core, Hibernate 3, Struts 1.x, Oracle, JAX-WS, JAXB, JAX-RS, JSF, XSLT, JasperReports, JBoss, AJAX (Prototype/Scriptaculous), Ant, Eclipse.
Partly permanent position.

Oct 2005 - Dec 2007

2 years 3 months

Gütersloh, Germany

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Arvato Systems

Built a new RSS analytics platform for MediaFed Ltd., London.
Co-designed and later enhanced the distributed architecture, led development, testing, and rollout at the client; added iterative enhancements.
J2EE, Spring Core, Struts, Servlets, RMI, MySQL, Tomcat, Ant, Eclipse.
Partly permanent position.