Cloud Engineer / Software Engineer

3/2015 – 8/2015

Part of 'commercetools labs' team located in Durham, NC, USA.

- Developed the first proof-of-concept of an integrated app-store like
integration service to the commercetools frontend called 'merchant center'
by which customers could enhance their feature set by booking featureapps that got installed and configured automatically in the Google Cloud.

- Originally started as a small task, the proof-of-concept led to
'commercetools labs' within the company to experiment with innovative
ideas.

- Used Technologies: NodeJs, Docker, Kubernetes, Google Cloud,
JavaScript, React.js, Redux

Docker, Google Cloud, JavaScript, Kubernetes, Node.Js, React (JavaScript library)

2/2012 – 10/2015

Part of the Designtime Team of SOA Backplane with Deutsche Telekom
AG.

- Designed and implemented the SOA Backplane service repository which
held business services for T-Mobile and T-Home.

- Enhanced model driven software approach (MDA) to generate database
layer, entities, rich-client GUI (Eclipse RCP) and web GUI, thus enabled rapid
changes of the whole SOA repository by just changing the UML model.

- Coordinated feature development between SOA repository and SOA
runtime team which led to a better joint understanding of features,
improved the quality and reduced customer complaints.

- Analyzed, raised and estimated business requirements, realized and
documented features, supported and trained testing departments from
India and Russia about the software.

- Advised the operations department during go-live and production incidents
yielded in minimal downtime of the application.

- Counseled the release management and supported in the release roadmap
process concluded in an optimized delivery for customers.

- Used Technologies: Java, UML, Hibernate, Eclipse RCP, Oracle DB,
JBoss, OS: Solaris, Red Hat Enterprise Linux (RHEL)

Eclipse Modeling Framework, Hibernate (Java), Java (allg.), Wildfly, Modellgetriebene Entwicklung, Oracle Database, Solaris, Red Hat Enterprise Linux (RHEL), Rich-Client, UML

4/2008 – 2/2012

Part of the Runtime Team of SOA Backplane with Deutsche Telekom AG.

- Developed the national and international central SOA infrastructure
runtime component "CAL" (serving HTTP and JMS) to fulfill the business
needs of T-Mobile and T-Home BSS.

- Optimized the application to near real time performance resulting in low
latency communication for the clients.

- Established a new agile development process using SCRUM within the team
which dramatically improved lead and cycle time.

- Introduced continuous integration to the project with end-to-end testing
the built components that ensured high quality results and fewer bugs.

- Responsible for operation and third level support of the legacy SOA
infrastructure.

- Responsible for the migration of the legacy SOA bus to the newer "SOA
Backplane".

- Supported customers in the transition phase that rendered an earlier
shutdown of the legacy SOA than originally planned.

- Used Technologies: Java, JMS (Tibco EMS, IBM MQ and ActiveMQ),
HTTP(S), Web Services, Tomcat, Weblogic Application Server, Teamcity

Apache Tomcat, Continuous Delivery, Hypertext Transfer Protocols (HTTP), Java (allg.), Java Message Service