Henning Petersen - Backend Developer for Java and Spring

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Berlin, Germany

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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.

Industry experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Banking and Finance, Media and Entertainment, Real Estate, Telecommunication, and Pharmaceutical.

Information Technology

Banking and Finance

Media and Entertainment

Real Estate

Telecommunication

Pharmaceutical

Business area experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Quality Assurance, Marketing, and Business Intelligence.

Information Technology

Product Development

Quality Assurance

Marketing

Business Intelligence

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)

Statistics

Experience

Total positions 20

Experience in Information Technology 7 y

Avg length 11 m

Longest experience 5 y 8 m

Global experience

Countries worked in 2 (Germany, United Kingdom)

Primary country Germany

Expertise

Recent roles Backend Systems Development, Development of a property recommendation system, Worked in the Data Engineering team

Main industries Information Technology, Banking and Finance, Media and Entertainment

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Highest degree Bachelor

Profile

Member since

September 2023

Last update

September 2024

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Frequently asked questions

Have questions? Find more information here.

Henning is based in Berlin, Germany.

Henning speaks the following languages: German (Native), English (Advanced).

Henning has at least 16 years of experience. During this time, Henning has worked in at least 18 different roles and for 12 different companies. The average length of individual experience is 1 year and 9 months. Note that Henning may not have shared all experience and actually has more experience.

Based on recent experience, Henning would be well-suited for roles such as: Backend Systems Development, Development of a property recommendation system, Worked in the Data Engineering team.

Henning's most recent position is Backend Systems Development at Deutsche Bank/DWS/Morgenfund.

In recent years, Henning has worked for Deutsche Bank/DWS/Morgenfund.

Henning is most experienced in industries like Information Technology, Banking and Finance, and Media and Entertainment. Henning also has some experience in Real Estate, Telecommunication, and Pharmaceutical.

Henning is most experienced in business areas like Information Technology, Product Development, and Quality Assurance. Henning also has some experience in Marketing and Business Intelligence.

Henning has recently worked in industries like Banking and Finance.

Henning has recently worked in business areas like Information Technology.

Henning holds a Bachelor in Digital Media from University of Bremen.

The availability of Henning needs to be confirmed.

Daily rate distribution

0 2 4 6 8

<€800 €800-1200 €1200-1600 €1600+

The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.

Average rates for similar positions

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Daily rate avg. 860 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

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750

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Median rate 800 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Calculated based on our freelancers’ daily rates as of 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.