Unix Experts in Düsseldorf

• Transition of Microsoft Azure operations to BTC AG
• Responsibility: budget of €60k
• Staff: leadership of 5 people
• Tools: Office 365, JIRA, Confluence

• Creating interfaces between the legacy platform and the new container solution
• Coordinating required contributions from line units
• Moderating regular status meetings with the software vendor
• Minimally invasive conversion of TWS scheduling from the old to the new platform
• Environment: IBM Mainframe, DB2, CICS, MQ, Red Hat Linux, Oracle, Kubernetes, Kafka, Helm, GitLab, Jenkins

• Ensured 99%+ platform availability across Android, iOS, and web, maintaining zero customer-impact and zero P1 incidents through proactive monitoring and risk mitigation.

• Led Incident, Problem, and Change Management with offshore operations and vendors, driving rapid issue resolution and improving product stability.

• Partnered with QA teams and international OpCos to validate defects, reproduce issues, and enhance product quality using real-time customer insights.

• Managed end-to-end lifecycle activities including platform migrations, infrastructure upgrades, certificate renewals, and integrations (Identity, API, Messaging).

• Established operational excellence and governance by designing service support models, leading Early Life Support (ELS) and post-launch stabilization, delivering KPI reporting, and ensuring seamless transition from project to service management.

• Product: Secure Net - Classic, Converged & Home Wifi Protect

• Product Description: The all-in-one digital security service that helps keep you and your family safe online when using the Vodafone (Mobile and Broadband) network. Get alerts if your personal information shows up anywhere it shouldn't, whilst we find and block malicious content across all your devices using.

• Clients: Vodafone OpCos - Spain, Italy, UK, Ireland, Greece, Turkey, Germany, Portugal, Romania

• Role & Location: Service Manager for Lifecycle and Operations at Düsseldorf, Germany

Worked with/on: ITSM Remedy, Jira, Confluence, Splunk, Dynatrace, Tableau, Mongo DB, Google Analytics, App Follow

• Evaluate, design, and implement Power BI solutions for Cat4 reporting, significantly improving reporting efficiency, accuracy, and stakeholder visibility.
• Develop and maintain robust data integration interfaces between Cat4 and Power BI, eliminating manual processing bottlenecks.
• Configure and continuously optimise Power BI reports to deliver sharper management insights and support data-driven decision-making.
• Ensure full GDPR data protection compliance across Power BI reports, proactively identifying and mitigating risks.
• Acquired in-depth product knowledge of CAT4, a globally deployed enterprise platform, enabling effective requirements analysis, solution design, and seamless Power BI integration across client environments.
• Developed and integrated scalable reporting templates within the CAT4 product interface, delivering new product features and enhancing data visualisation, reporting efficiency, and stakeholder visibility across global users.
• Trained and mentored staff on Power BI configuration and best practices, accelerating adoption and embedding a data-driven culture.
• Prepared clear technical documentation and delivered hands-on demonstrations to end users and clients, ensuring smooth adoption and confident use of Power BI solutions integrated with CAT4.
• Researched and recommended licensing strategies for cost-effective and scalable Power BI deployment.

SKILLS - BI & Visualisation: Power BI (Desktop, Service, Report Builder), DAX, Power Query

Project and Product Management Tool: CAT4

• Supporting several agile teams in the new product development of an enterprise CRM and ERP application
• Web frontend development with Angular 17–21 (microfrontends, Domain-Driven Design, MDB-Bootstrap)
• Backend development with C# and .NET 7–10, MongoDB, MassTransit, RabbitMQ, Entity Framework Core, ElasticSearch (microservices, DDD)
• Technical feature design for assigned tasks
• Technical architecture design including forward-looking planning of AI-supported extension options
• Proof-of-concept implementation of AI-supported workflows with n8n and a locally hosted LLM (Ollama)
• Coordination with stakeholders and Product Owners, support with sprint planning

Result: Delivery of production-ready microservices and frontend modules in agile sprint cycles.

Environment: .NET 7–10 · Angular 17–21 · C# · TypeScript · OpenAPI · Microfrontends · DDD · Kubernetes · Docker · Helm · MS SQL Server · PostgreSQL · MongoDB · MassTransit · RabbitMQ · EF Core · ElasticSearch · Kibana · Azure DevOps · KeyCloak · n8n · Ollama

• Led the subproject for implementing Vulnerability Response as part of DORA
• Documented the current processes in compliance, risk & security
• Created the functional design for introducing application, infrastructure, and cloud vulnerabilities
• Agile management of the integration service provider, the technical department, and the company's cross-functional teams
• Integrated the V scanners Tenable, Qualys and Defender, as well as NVD and CISA/KEV
• Integrated GitLab Ultimate for importing and processing SBOMs
• Developed automation rules to match scan results with CIs in the CMDB, assign vulnerabilities and remediation tasks, handle approvals (false positives, exceptions) and closures
• Calculated multiple risk scores and priorities
• Defined dashboards and reports (Workspaces, Performance Analytics)
• Aligned the new processes, especially to improve the CMDB data quality (according to CSDM)

• Introduction of a central change process
• Technical support for the operational implementation of changes (ITIL technical change management)
• Co-design and technical implementation of digital processes

• Assessing the current status (planning stage / rollout status) of the so-called inter-polygon routes
• Creating an end-to-end project plan for the individual routes, considering active and passive components and tasks
• Monitoring and controlling the implementation of the plan
• Optimizing the chosen network architecture
• Creating network and splice diagrams

• Design, development, and execution of load and performance tests for the PRISMA project
• Use of Apache Jmeter, Gatling, Apache ActiveMQ, Jms/Tibco Ems, SikuliX, Jython, Amazon AWS, PAN-Client
• Methods: load tests, test automation

• Led the “New UBS Custodian” project in agile mode
• Responsible for planning, coordinating and implementing the project
• Created project and milestone plans, including goal definitions, detailed schedules and resource allocation
• Conducted as-is and to-be process analyses with operational departments
• Prepared detailed requirements analyses and specifications for development teams and IT providers
• Supported the technical implementation of the developed business concepts
• Ensured requirements and specifications were met during the implementation phase
• Managed process activities for KeyLink asset onboarding
• Acted as interface between internal stakeholders, the provider FIS and UBS
• Planned and led the steering committee meetings

• Visualization, search, and maintenance of various types of master data, providing them via a REST API, and implementing a variety of import and export formats.

• Implementation, architecture, project management.

• Technologies and tools: Angular (Signals, Signal Store, swagger-codegen, standalone components), Java, PostgreSQL, ActiveMQ, JavaScript, Spring Boot (Spring Core, Spring MVC, Spring Data/JPA via Hibernate, Spring Security, Spring Modulith), JUnit, Flyway, QueryDSL, GraphQL, REST API, Node, npm, Maven, SonarQube, GitLab CI/CD pipelines, Docker, Nexus, OpenAPI + Swagger UI, Keycloak, OAuth2, OpenID Connect, IntelliJ IDEA, Jira, Confluence.

• Consulting on processes and execution of load tests, performance tests and technical tests of various applications: web portal, file cloud, email, video conferencing, learning/course platform
• Creating the load test framework
• Programming test scripts (JMeter, Selenium)
• Developing batches to support the evaluation
• Executing load tests and evaluating results, including clear reporting, recommendations for action, and bottleneck analysis
• Managing tasks and collaboration to achieve meaningful load test results

• Design and implementation of an OCI-based data warehouse and ETL system to replace legacy mainframe applications
• Developed a database optimization strategy and planned the rapid conversion of JCL and COBOL routines to PL/SQL using AI
• Developed an Oracle Apex-based app for internal administrative processes in the public sector (office equipment, staff training)
• Implemented PL/SQL workflows for approval processes and created a responsive mobile version with JavaScript and CSS
• Used Azure DevOps for backlog management and documentation, and Git for version control
• Developed REST interfaces to CRM systems
• Replaced and reprogrammed Oracle Forms screens with Oracle Apex and updated to the latest Apex versions
• Designed a Git branching strategy and conducted code reviews
• Maintained and further developed an EDI-based data exchange system based on Oracle Advanced Queuing for the public sector in Austria
• Performed data analysis and created charts in the Oracle Apex frontend; installed standalone ORDS and Apex 23.1
• Worked agile using the Spotify model; developed complex Apex pages with support from Oracle JET
• Rebuilt and customized existing PL/SQL packages, created workarounds for database version differences, and optimized queries
• Developed Apex applications for broker pools to manage and optimize Oracle databases in the banking environment, including SSO-based authorization systems with OAuth2 and Keycloak
• Built extensive Oracle Apex applications for BI and data mining modernization projects and developed manual and automated projection methods in the frontend
• Carried out data warehousing projects in the banking sector and used Scrum and Kanban in team projects

• Creation of business and technical concepts as well as support for enterprise architecture management as part of the migration to the Adesso standard insurance solutions and the renewal of surrounding systems

• Interface definitions

• Business analysis and creation of the business concepts for input management and sales

• Creation of architecture guidelines and processes

• Processing technical and business decisions in the architecture board

• Definition of service processes and system management aspects

• Creation of the technical target operating model

• Creation of an integration architecture for AI/LLMs from the providers Commasoft and Insiders

• CommaSoft (Alan) webpages and web services

• Insiders for Smartfix based on web services

• Creation of a question catalog for a security/regulatory check.

• Analysis of threats using threat modeling / STRIDE incl. creation of a set of measures to secure the systems

System environment: Jira, Confluence, Java, Enterprise Architect, VAIT/DORA, KritisV, GDPR, IT ServiceMgmt, Adesso Ecosphere and Insure Health, DoPIX and successor product, SmartFix, SmartFlow, Zabas, Kolumbus, Clarc archive, BiPRO, AI / LLM, MS Azure, AWS, TOM/FMO