XML Experts in Dusseldorf

• Overall project planning for resources, budget, costs, license and service contracts, cost optimization and negotiations
• Leading and managing the project team and achieving the project goals
• Leading digitalization projects and their phases such as concept, planning, change and requirements management, configuration, implementation, testing, interfaces, communication and approval
• Conducting planning meetings
• Organizing, planning and conducting team, customer and requirements workshops with up to 50 participants at operational and management level
• Main contact for technical and functional topics as well as project coordination
• Recording and maintaining backlogs (user stories and EPICs) in Jira and turning requirements into user stories and prioritizing them
• Approval and publication of online services in the Wirtschafts-Service-Portal.NRW (WSP.NRW)
• Creating and maintaining project documentation
• Planning and designing the nationwide rollout/reuse as part of the once-for-all principle via WSP/FIT-Connect
• Communication between stakeholders, customers, authorities and the Ministry of Economic Affairs, Industry, Climate Protection and Energy (MWIKE)
• Work according to the SCRUM method

• SAP ERP/ECC, SAP S/4 Hana
• Analysis and documentation of SAP FI/CO, PSM, PSCD customizing
• Analysis, consulting and documentation of S/4 Hana apps for defining and preparing statutory reports
• Clarification of the prerequisites for using S/4 Hana apps to define and prepare statutory reports
• Analysis and documentation of customizing for in-house developments
• Consulting on the integration of SAP FI/CO as well as PSM, PSM-FM (Funds Management), Contract Accounts Receivable and Payable (PSCD)
• Consulting and documentation of customizing adjustments in SAP FI/CO, PSM, PSM-FM and PSCD for the introduction of new company codes and other organizational structures
• Consulting and documentation of required process adjustments

• Analysis and remediation of security vulnerabilities in a risk assessment system for energy trading
• System analysis
• Threat modeling
• Decision-making on vulnerability mitigation strategies
• Implementation of vulnerability detection mechanisms
• Security scans
• DevSecOps practices
• Technical environment: Visual Studio Code, JetBrains Suite, MS Threat Modeling Tool, DevSecOps, Git, AWS, DynamoDB, SQL Server, Endur, Snowflake, Orca
• Languages: C#, JavaScript, TypeScript, Python, PowerShell, Bash, Terraform, SQL

• Self-employed PLC and software specialist focusing on automation and special-purpose machinery
• Programming, modernization, expansion and optimization of production systems, focusing on increased efficiency, data transparency and system integration
• PLC programming and safety with Siemens S7 Classic/TIA Portal, Beckhoff TwinCAT 2/3 and CoDeSys
• Development of high-level language software and database applications (.NET / C#, C++, Visual Basic .NET, Borland/Embarcadero C++)
• Development of custom software solutions for industrial automation, including embedded systems (Raspberry Pi, Arduino, NodeMCU, ESP8266)
• Integration of external systems such as reading devices, printers, scales, scanners and cameras, as well as various bus systems (Ethernet, Profinet, Profibus, EtherCAT, CAN bus, RS232, TCP/IP)
• Creation of visualizations and HMI applications with Siemens WinCC flexible, Beckhoff HMI and .NET frontends
• Planning, development and integration of machine vision solutions (Keyence, Cognex, AVS Alfavision, camera systems) in PLC and PC environments
• Design and implementation of process data collection systems and traceability solutions (100% traceability) based on Microsoft SQL Server (Compact, Express, Server), including stored procedures and direct PLC-SQL communication
• Creation of software and PLC concepts, standard function blocks and project libraries for PLC and high-level language projects
• Planning and programming of conveyor, inspection, assembly, packaging and grinding systems in industries such as automotive, chemical, food, electronics, machinery and systems engineering
• Conducting workshops and training on Siemens TIA Portal, STEP7 Classic, Beckhoff TwinCAT (including TwinSAFE), as well as topics such as architectures, safety, database integration and documentation
• Creation of technical documentation, manuals, training materials and class documentation with Microsoft Office and Doxygen
• Project management tasks from requirements analysis through planning, concept development and supplier coordination to commissioning, production support and customer support

• Support and consulting for the integration of SAP ECC into an SAP S/4HANA system, retirement of legacy systems, implementation, and process optimization in the new harmonized system
• Project implementation of S/4HANA Cloud Private & Public Sales & Services with SAP SCM/OTC/MM/LE/CS/PS, S/4HANA Cloud, CPI, BTP, EDI, IDOC, ABAP, User-Exit, SolMan, ITIL, SAP Cloud AL
• Customizing and optimization in OTC and MM, including condition maintenance, document type and item category extensions, integration with FI/CO, scheduling agreement configuration, material master and purchasing info record maintenance, release procedures, message control, and master data quality
• Ensuring integration of PTP with FI/CO, SD, and WM, process analysis, and efficiency improvement for the S/4HANA environment
• Process modeling in Signavio, workshops, and trainings
• 2nd & 3rd level support in OTC, MM, CS, PS, C4C Sales & Services, GTS, and MDG: incident and change tickets, feasibility analyses, service management, embedded analytics, customizing, tests, documentation, training, debugging, IDOC/EDI monitoring
• SAP S/4HANA migration: data migration, system harmonization, global rollouts, and template development
• ABAP development and optimization: reports, dialog programs, user exits, IDOC/EDI monitoring

• 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

• Development and maintenance of database-driven applications for managing supplier and food contracts, with extensive use of Oracle PL/SQL for complex business logic and data processing
• Optimization of PL/SQL procedures, functions, and triggers to ensure the performance and scalability of Oracle database solutions
• Ensuring compliance with best practices in PL/SQL development and implementing standards for code quality and data integrity
• Close collaboration with backend and frontend teams to ensure smooth integration between the Oracle database, C#-based APIs, and Azure cloud services

• Worked on FPGA enhanced network encryption device with secure boot, TPM2.0 and smart card integration for BSI approved usage with Post Quantum Cryptography
• Developed and audited Linux drivers
• Collaborated using GitLab, Gerrit, Confluence and Jira
• Technologies: C, C++, Secure Boot

The Helaba ATLAS project aims to modernize core systems and make them future-proof. As part of the subproject, the existing legacy system for international payments is being replaced by a modern web-based application.

• Analysis of functional and technical requirements
• Analysis and optimization of business processes
• Process modeling
• Preparation and facilitation of workshops
• Defining project scope and prioritizing requirements
• Business process management (analysis, modeling, and optimization)
• Specification of user stories
• Designing business and authorization concepts
• Testing and acceptance
• Designing mockups in Figma
• Creating the UI/UX style guide for web applications Approach: Scrum (agile) Technologies: Jira, Confluence, MS Teams, Conceptboard, Java, Vaadin, Figma

• Executed post-carve-out stabilization, system consolidation and cybersecurity uplift. Re-assessed system landscape and assets and designed new IT strategy for future. Implemented new IT operating model focusing on product-centric organization and re-internalization of critical resources.
• Successfully designed new IT operating model of the company, based on massive reduction of external dependencies, insourcing of key positions and upskilling of employees.
• Massive reduction of IT cost in the first three years (-40m$), bringing IT spend level below Gartner industry benchmark (1.27%).
• Introduced new product-centric organization based on fusion teams between business and IT across the company.
• Administered implementation of corporate-wide IT/OT cybersecurity program with more than 60 projects.
• Continuous improvement of enterprise IT/OT cybersecurity maturity level with significant increase in the first two years (CMMI >3.5, C2M2 >2.5).
• Governed successful implementation of the business transformation program within IT area by overachieving the savings target by $8m.
• Initiated and created new cloud-based data management platform based on best-in-class technology.
• Implemented first company-wide Microsoft Copilot AI program based on various business cases, leveraging GenAI and AgenticAI.

• Introduction of giro card with Visa Debit card payment function (Combocard) for Commerzbank
• Support for the Card Processing Team (card processing; Clearing & Settlement incl. Dispute Management teams) in project work
• Creation of requirements for the Clearing & Settlement team, Authorization team (AZ) and Card Production team (KP) as part of a requirements catalog
• Requirements engineering (requirements management) with business contact person
• Participation in workstream meetings between VISA Inc., SRC Security Research & Consulting GmbH, Commerzbank AG and consulting firms (PwC and Senacor Technologies AG)
• Sprint planning with Jira tickets of type Task and use of Confluence
• Creation and presentation of weekly status reports for the Clearing & Settlement, Dispute Management and Reporting & GUI workstreams
• Coordination with network and file transfer teams for connection tests of new interfaces, e.g. setup of host keys, use of VPN or sipnet connections
• Coordination of the delivery of test files, e.g. exchange rates (FX rates; TC 56 of VISA rates), VISA Debit and Credit transactions (format Base II) and EANSS/ISS Base II clearing files to the Debit Clearing System (DCS)
• Conducting coordination meetings on the use of Visanet Settlement Service (VSS) and PSD2 reports and payment traffic statistics (ZVS)
• Organizing workshops with FiServ (First Data) on Dispute Management and complaint handling
• Setup and maintenance of Open Point List (OPL) in Confluence
• Technologies/methods: Jira, Confluence, giro card, VISA Debit card, payments, Kanban board, BIN, routing, CIQ, VPAY, ScalaTest, Dispute Management

• Deriving test cases in IBM DOORS for various devices according to ISTQB
• Automating and running test cases in Python under Linux
• MobaXtrem, Windchill are in use

• Analysis of the possibility of transferring market location data to a separate microservice in an overarching web portal
• Development of a more user-friendly target process based on the current process in coordination with users
• Coordination of the related architecture concept with architects/developers
• Coordination of the related epics and user stories with the relevant business departments
• Backlog prioritization and project planning (including effort estimation)
• Testing and acceptance of implemented user stories
• Technologies/tools used: MS Office, Jira, Mural, Kotlin, React, GitHub, MS Azure, SQL, Postman, XML, JSON, Kafka, Balsamiq, BPMN

• Various programming tasks as specified
• Work carried out from home office, meetings/tasks via email, phone and Microsoft Teams
• Version control via GIT
• Implementation with RDI, FreeSQL SQL
• Extension of automatic test environment creation as specified - adding automatic transfer of existing iSeries users and preparation as well as anonymization of test data
• Creation of trigger and service programs in SQLRPGLE, FreeRPG, ILE RPG and CLLE
• Development and implementation of the CallKredite project including additional extensions for other departments
• Conversion of RPG to Free-RPG and SQL as well as extension of existing modules as specified
• Migration to a new banking release
• Support for specialist segment / OIV