Experience

1&1 Mail & Media Applications SE - GMX | WEB.DE | mail.com

• Germany
• Technology, Information and Internet
• 300 - 400 Employee

• Team Software Architect and Senior Java Software Developer

  • Dec 2018 - Present

  München, Bayern, Deutschland As Team Architect I am main responsible for the architecture our Services. I align with the Product Management and the System Architects our services and how they fit into the overall 1&1 Mail And Media System. I write concepts and create prototypes as well as I support the developer team implementing the services. I extended our internal Push System and increased the stability, scalability and availability. Therefore I have migrated our push system to a new technology stack with Apache… Show more As Team Architect I am main responsible for the architecture our Services. I align with the Product Management and the System Architects our services and how they fit into the overall 1&1 Mail And Media System. I write concepts and create prototypes as well as I support the developer team implementing the services. I extended our internal Push System and increased the stability, scalability and availability. Therefore I have migrated our push system to a new technology stack with Apache Kafka, Java 17, Apache Cassandra 4 and HTTP/2. Additionaly the system was migrated from a system running on bare metal to a system running in a Kubernetes Cluster. Additionaly I have, with the team, designed and implemented different Restful Web Services wich make it easier for our clients (WEBDE, GMX Webpage and Apps) to communicate with our Backend Services. Among others a RESTFul Web Service wich acts as a Facade to different other services and collects context-, and consent-information and sends them to the Advertisement Service.

• System Architect

  • Apr 2013 - Nov 2018

  Munich, Bavaria, Deutschland As a system architect, I was responsible, together with the other system architects, for the architecture of the services on our WEB.de and GMX apps. I was mainly responsible for developing the architecture of the the push system that provides our apps and frontend with push messages. Together with the team architects, I developed the architecture of the WEB.de and GMX apps and developed our system landscape further in order to make the communication of the apps with our services as… Show more As a system architect, I was responsible, together with the other system architects, for the architecture of the services on our WEB.de and GMX apps. I was mainly responsible for developing the architecture of the the push system that provides our apps and frontend with push messages. Together with the team architects, I developed the architecture of the WEB.de and GMX apps and developed our system landscape further in order to make the communication of the apps with our services as efficient and reliable as possible.

• Senior Java-Softwareengineer

  • Feb 2010 - Apr 2013

  Munich As Senior Java Developer I have developed different Java REST Services as well as migrated the user master data from one Oracle Database instance to another one while the system was in use and without loosing any data. In this time I also have developed a high available single sign on system based on java REST Services and an Apache Cassandra Cluster. The system was designed and aligned together with the IT and the Architects.



DATALOG Software AG

• Germany
• IT Services and IT Consulting
• 1 - 100 Employee

• Architect Enterprise Solutions / Senior Software Developer

  • Jan 2006 - Jan 2010

  Munich, Bavaria, Deutschland As Senior Software Developer I was responsible for the further development of a J2EE based system for the management of leasing computers. I've managed the further development together with the customer's project manager, created the releases and deployed them on the customer's systems in coordination with the customer. As an enterprise solution architect, I worked with the client to design and prototype a .NET based system for capturing and managing mamography data and deployed it on the… Show more As Senior Software Developer I was responsible for the further development of a J2EE based system for the management of leasing computers. I've managed the further development together with the customer's project manager, created the releases and deployed them on the customer's systems in coordination with the customer. As an enterprise solution architect, I worked with the client to design and prototype a .NET based system for capturing and managing mamography data and deployed it on the client's systems. Show less



Kassenärztliche Vereinigung Bayerns

• Germany
• Hospitals and Health Care
• 100 - 200 Employee

• Leading Software Engineer

  • Nov 2004 - Dec 2005

  Munich, Bavaria, Germany As Leading Software Engineer I was responsible for analysing and designing a system of a system that manages contradictions. The system was based on JSF Java and a Oracle Database. I've managed a developer team of 5 developers and introduced Java Server Faces as frontend framework at the KVB



Healy Hudson GmbH

• Softwarenengieer

  • Mar 2000 - Oct 2004

  Munich, Bavaria, Germany I have worked as a software developer on various components. As part of the frontend development team I helped to develop parts of the web frontend based on JSPs. I was in charge of the development of a Java based converter that was able to convert customer catalog data into the Healy Hudson format and import it into an ordering system. For a customer I wrote the connection of the Healy Hudson system to a SAP system.



CompuServe

• Technology, Information and Internet
• 1 - 100 Employee

• Java-Programmierer

  • Feb 2000 - Feb 2000

  München Unterstützung des Compuserve Teams beim aktualisieren der Portal Seiten.



Freiberuflich

• Berater EDV (Freelancer)

  • Mar 1998 - Feb 2000

  Metropolregion München Working as Freelancer in different small projects helping building html web pages.