IT Service & Consulting, Interim Manager, Operation Manager, Tech Lead, Software Development

Project name: Cloud Native Software Development.

The main focus has been on two projects: one for introducing innovative cloud technologies and optimizing the entire software development and delivery lifecycle (SDLC) for several product teams within a federal agency. The first dealt with providing basic development in a cloud environment for the mentioned product teams, and the second with operating a private cloud.

As an external IT consultant, I was responsible for reviewing and strategically advancing the introduction and operation of this new private cloud organizationally, technically, and functionally. I also supported the cloud-native approach in the first project.

Tools: Java, Spring, Kubernetes, Docker, ArgoCD, Tekton, Prometheus, Grafana, Kibana, GoAlert, Tilt, PowerShell, Bash scripting, Jira, Confluence, Git, Ubuntu, Windows 10, Scrum

Dataport AöR is a public-law institution that provides IT services for public administration. As a full-service provider for IT and administration, Dataport delivers and manages services not only for the Free and Hanseatic City of Hamburg and its institutions, but also for other federal states like Bremen, Schleswig-Holstein, Mecklenburg-Vorpommern, Lower Saxony, and Saxony-Anhalt.

Project: Software procurement (CRM, HRM, ERP, Web shop)

To optimize internal processes (business and work processes as well as specialized procedures) and thus enable the work of around 4,400 employees across 9 locations, as well as nationwide mobile work, several projects and programs were initiated. This included preparing and conducting a request for expressions of interest to modernize and possibly phase out the current IT landscape with innovative and industry-leading solutions.

As a core working group member, I was responsible for preparing and executing the entire process for the R-areas (especially sales - RV) to introduce a new system landscape (CRM and AVM, HR delivery, web shop, supplier and contract management, accounting and controlling, ERP).

Project: Cloud Portal (OZG, EfA)

The Cloud Portal initiative was part of Dataport's efforts to provide a clear solution for implementing the legal framework defined in the Online Access Act (OZG) for administrative digitalization. Compliance with the OZG had to be ensured. Furthermore, the maturity level of previous developments had to be determined: specifically, to what extent the current internal cloud strategy not only meets the legal and technical requirements of NOOTS (National Once-Only Technical System) and connects to the EU OOTS (EU Once-Only Technical System), but also aligns with the 'One for All' (EfA) principle.

As Cloud Portal Manager, I reviewed and reformulated the internal cloud strategy, and realigned it according to new federal-level OZG guidelines and conditions. As Interface Manager, I was responsible for coordinating various external IT service providers and internal departments.

Project name: Active maintenance and further development of the BQM tool.

The BQM tool project is responsible for creating a web-based application for validating and ensuring the quality of Volkswagen Mobile Online Services backend components. The tool is designed to support end-to-end and backend integration during error analysis. It views and assesses the health status and maturity level of relevant VW services to finally make a release recommendation for planned deployments.

Mainly as a backend developer, I was responsible for actively maintaining existing service modules in this project. In addition, I was involved in designing and developing new backend modules.

Tools/Technologies: Java, JEE, SQL, Databases (PostgreSQL, InfluxDB), Flyway, Swagger, Bitbucket, Jira, Confluence, Bamboo, JFrog Artifactory, Spring Boot, SonarQube, Apache Maven, Apache Tomcat, Eclipse IDE, Visual Code, Git, Angular, Postman, Grafana, Consul, Docker, Kubernetes, AWS EKS, FluxCD, Helm, Google JIB, PlantUML, Requirements Engineering, SCRUM

The OS.bee project is a proprietary software platform by Compex Systemhaus GmbH for generating web applications based on the Eclipse Open Standard Business Platform project, which it also operates. The platform follows a model-based no-code low-code software development approach.

Project: Core development of the OSBP/OS.bee Software Factory (07/2017 - 12/2019)

As a core and co-lead developer, I was responsible for actively further developing the OSBP & OS.bee Software Factory platforms.

I was also responsible for extensions to a CSV reader tool for generating complex business web applications.

In addition to creating technical documents, user documentation, and training materials, I was also responsible for maintaining forum and blog posts.

Tools/Technologies: JEE, Git, Eclipse IDE, OSGi Equinox, EMF, Xtext Xtend, Xbase, Vaadin, Sirius, jBPM, Camunda, Drools, Mondrian, Apache Shiro, BIRT, EclipseLink, Hibernate, OSGi Gemini, Apache ActiveMQ, Smooks, Quartz, Eclipse MicroProfile, UOMo, TapiJI, mxGraph, Jetty, Maven & Eclipse Tycho, Jenkins, Gerrit, SonarQube, jFairy, SWT Widgets (Opal), Databases (Oracle, MySQL, MSSQL, H2, Derby), Spring Data REST, Spring Web MVC.

Project: Signal DSL for the OSBP/OS.bee Software Factory (03/2018 - 12/2019)

The Signal DSL module language was designed to enable automatic and time-controlled execution of functions, as well as filesystem monitoring functions. It then had to be made available for both platforms.

As product owner, my main task was to capture customer requirements and translate them into concrete work tasks, as well as to prepare reports and hold customer workshops at regular intervals. I was also responsible for team leadership in this project.

As tech lead, I was responsible for the technical realization of the stated requirements. I was primarily responsible for the active development of this new module.

I also took on creating technical and user documentation, the corresponding training materials, and forum and blog posts. Training new employees in using and further developing this module was also part of my tasks.

Tools/Technologies: Requirements Engineering, UML, JEE, Git, Eclipse IDE, OSGi Equinox, EMF, Xtext Xtend, Xbase, Vaadin, jBPM, Camunda, Drools, Apache Shiro, EclipseLink, Hibernate, OSGi Gemini, Smooks, Quartz, Eclipse MicroProfile, Jetty, Maven & Eclipse Tycho, Jenkins, Gerrit, SonarQube, jFairy, SWT Widgets (Opal), Databases (Oracle, MySQL, MSSQL, H2, Derby), Spring Data REST, Spring Web MVC.

Project name: Development of a new warehouse management system.

Since its founding in 1929, Robert Schmitz is a family-owned shipping company specializing in handling heavy goods. The service profile not only included storage of, among other things, pulp and rolled steel in heated warehouses, but also the delivery of these goods both regionally using tractor units and internationally with ocean containers. To meet the maintenance of stored goods, customs clearance, delivery orders for its customers and clients, and the constantly growing performance demands, a new warehouse management system had to be created.

As a product owner, I partly worked on gathering the requirements catalog. However, I was mainly responsible for analysis, design, documentation, and translating and transferring customer requirements into work packages and tasks. I was also responsible for assigning and monitoring these tasks to developers. This also included preparing customer workshops and parts of customer communication. I also shared responsibility for team leadership in this project.

As tech lead, I was responsible for the technical implementation of these requirements: from designing the user interfaces using mockups to the main development of application modules such as inventory and goods receipt for both desktop and mobile devices. I also took on creating the technical specification.

Tools/Technologies: Requirements Engineering, UML, Java, JEE, Oracle Database 12c, JSF, JSP, JavaScript, CaptainCasa Enterprise Client, CVS, XML, Eclipse, DBVisualizer, Actricity, JasperStudio, iReport, UML, PL-Store software solutions, Apache Ant, Apache Tomcat Server, Hibernate.

Project Name: Maintenance and enhancements of an existing warehouse management system.

The company Heil & Sohn GmbH & Co. KG supplies a wide range of spare parts for motor vehicles. To modernize and improve the logistical work processes, the existing warehouse management system was to be extended.

In this project, I was responsible for expanding the system interface to an SAP ERP system, extending the existing data model based on new customer requirements, and designing new print documents and reports.

I was also in charge of extending the inventory module and fixing bugs.

Tools: Java, JEE, Oracle Database 12c, Hibernate, JSF, JSP, HTML, CSS, JavaScript, CaptainCasa Enterprise Client, CVS, XML, Eclipse, DBVisualizer, Actricity, JasperStudio, iReport, UML, PL-Store software solutions, Extensible Markup Language (XML), Apache Ant, Apache Tomcat Server.

Project Name: Maintenance and enhancements of a warehouse management system.

The family-owned company ABS Safety GmbH from Kevelaer offers modern fall protection and safety systems for roofers, craftsmen and installers, and supplies, among others, the construction industry. To modernize the production and logistical work processes of proLogistik GmbH & Co KG, the existing warehouse management system had to be expanded.

In this project, I was responsible for designing new print documents and reports.

I was also responsible for the design, creation and integration of a new module for handling dangerous goods according to the international law for the transport of dangerous goods (ADR 2015) and for connecting it to the shipping system of Heidler Barcode GmbH.

I was further responsible for fixing bugs in the entire application, documenting them, and creating technical and user documentation.

Tools: Java, JEE, Oracle Database 12c, Hibernate, JSF, JSP, HTML, CSS, JavaScript, CaptainCasa Enterprise Client, CVS, XML, Eclipse, DBVisualizer, Actricity, JasperStudio, iReport, UML, PL-Store software solutions, Extensible Markup Language (XML), Apache Ant, Apache Tomcat Server

Project name: Quality assurance, maintenance, and enhancements of a warehouse management system.

For the fashion jewelry specialist and supplier beeline GmbH of the Beeline Group, all intralogistics processes and capacities for the main facility in Cologne-Kalk had to be modernized.

In this project, quality assurance of all workflows was my main focus. Among other things, I checked the integrity, persistence, and logical composition of the entire data model (before, during, and after processing between modules). This covered workflows such as goods receipt, pallet storage strategies (MFS-driven), quality inspection, and outbound management.

These tests also included creating host data via an SAP interface using IDOCs, simulating all work steps at dedicated workstations, and monitoring data state changes throughout the data flow with unit and integration tests.

I was also responsible for adapting the business logic based on new client requirements and delivering these warehouse management processes on mobile devices (PDAs and industrial tablets).

It is also worth mentioning that I completed print documents using ZEBRA printer programming. I was also responsible for creating technical and user documentation as well as bug fixing.

Tools: Java, Java EE, Oracle Database 9i/10g, Hibernate, CVS, Tortoise CVS, SVN, Tortoise SVN, Eclipse IDE, Extensible Markup Language (XML), JIRA Bug Tracking System, Java, JEE, Apache Ant, Continuous Deployment, Eclipse JFace and SWT, Hibernate, JUnit, Jenkins, IBM WebSphere Application Server