Solution Architect

For an internationally operating bank based in Frankfurt am Main, I led the design of an operating environment based on Kubernetes and coordinated the collaboration of the governance, network design, security, and operations and development tools workstreams.

• Coordinating collaboration.
• Creating an infrastructure concept.
• Developing the solution design.
• Tools: Kubernetes, Microsoft Word, StarUML.

Since January 2022, I have been consulting and supporting ekom21's software development division on requirements engineering, software, cloud, and DevOps architecture. Among other things, I conducted several event-storming and user-story-mapping workshops for ekom21.

I also supported optimizing and rebuilding the development environment based on GitLab, Harbor, and Kubernetes.

• Consulting and supporting software development.
• Building the development environment.
• Building and optimizing pipelines (GitLab CI).
• Conducting workshops.
• Tools: Kubernetes, Java 11, Java 17, GitLab, Confluence, User-Story-Mapping, Event-Storming, Harbor, GitLab, Git, GitLab CI, Helm, FluxCD.

As Head of Development, I led the company's development team. In addition to managing staff, I was responsible for software architecture and the cloud environment.

Through presentations, marketing measures, and involving external partners, I doubled the team size.

As department head, I drove the new product segment Check-in forward technologically and, as part of that, designed an abstraction for integration with property management systems and supported the implementation as product owner.

As Head of Architecture, I advanced Kubernetes and built a platform to operate the existing systems. Besides in-house developments, I provided log and metric analysis capabilities on the platform.

• Managing staff (8 developers).
• Software architecture.
• Building the cloud environment (DevOps).
• Product owner for the property management system gateway.
• Tools: Java 11, NodeJS, PostgreSQL, Spring Integration, Azure Service Bus, Azure Kubernetes Service (AKS), Terraform, OpsGenie, Jira, Confluence, Git, Azure DevOps, Helm, FluxCD, Grafana, Grafana Loki, Prometheus, Kanban, Scrum, IT architecture.

Within this project, an existing transport management system of a globally operating forwarder in northern Germany is being replaced by a redevelopment. The newly developed system is based on event-sourcing concepts and is completely event-driven.

• Developing components.
• Bug fixing.
• Tools: Java 10, Spring Boot, Oracle 12, Apache Kafka, Polymer, Bitbucket, Scrum.

From March 2018, I advised a startup that needed help implementing a rough idea. In a user-story-mapping workshop, I helped the founders clarify their idea. I documented the workshop results in an implementation concept. Later, I supported the startup in developing a requirements specification.

• Conducting the user-story-mapping workshop.
• Processing and documenting workshop results.
• Consulting.
• Tools: Figma, Microsoft Office.

As part of the Tech Boost program, I migrated a startup's operations to the Open Telekom Cloud and Kubernetes. In this role, I evaluated several Kubernetes installation methods. Ultimately, the Open Telekom Cloud Container Engine was chosen.

• Evaluating Kubernetes installation methods.
• Deploying and configuring clusters.
• Tools: Kubernetes, Ansible, Open Telekom Cloud.

An administrative offense procedure for a public law body is in use nationwide. In this role, I served as lead software developer and software architect. The procedure was implemented with a microservices architecture and developed according to domain-driven design principles. The event-driven architecture was implemented using the event-sourcing pattern to ensure traceability.

For operation of the software, I set up a three-node Kubernetes cluster using Ansible.

• Leading the development team (6 developers).
• Managing external developers.
• Creating the software architecture.
• Tools: Java 8, IntelliJ, Spring Boot, RabbitMQ, Domain-Driven Design, Event-Sourcing, Docker, JUnit, MongoDB, PostgreSQL, Kubernetes, Flyway, QueryDSL, REST, API, XML, Maven, Gerrit, Jenkins, Scrum.

For this role, I led the development of a logistics portal for private customers. I took on a leadership role and designed the portal architecture in coordination with stakeholders and the development team.

• Leading the development team (4 developers).
• Creating the software architecture.
• Reporting to project management.
• Tools: Java 7, Spring Web MVC, Spring Data, PostgreSQL, Spring Integration, JBoss EAP, Confluence, Flyway, JPA, API, Hibernate, IntelliJ, Gradle, Git, Subversion, Jenkins, Gerrit, Scrum.

In this role, I contributed to the development of operations software for a telecommunications provider. The development followed a functional design and included unit test programming.

• Creating modules according to specification.
• Writing unit tests.
• Tools: Java 6, Oracle 10, Swing, JUnit, Eclipse, Ant.

To simplify communication between customers, developers, and stakeholders, I set up a wiki based on Confluence. My tasks included coordinating with stakeholders, finding a suitable wiki structure, and training users.

• Communicating with stakeholders.
• Training users.
• Tools: Confluence, Microsoft Office.

In this role, I took over the maintenance and enhancement of a management system. The system is used by technical offices of the central depot of a German automaker for inventory, training, and personnel management. Besides maintenance, I created a requirements specification describing the solution's features.

• Maintaining and enhancing software.
• Creating a requirements specification.
• Tools: PHP, MySQL, Apache HTTP, Eclipse.