SAP NetWeaver Experts in Germany

• Add/create test specifications
• Conduct regression tests
• Conduct release tests
• Analyze Jira tickets
• Identify software defects and fix them with C#

• Support in fit-gap analysis for three RM-CA systems focusing on sub-ledger reconciliation, dunning, and collections processes.
• Stakeholder management in international teams (business colleagues, IT colleagues, and external partners).
• Escalation and risk management (PM).
• Cost and budget calculation (PM).
• Support in shaping the strategic direction of the global collections system.
• Resolving technical challenges for the central collections system (multi-company operation).
• High-level design of the central AR system with focus on scalability and process harmonization.

• Set up GUI test framework for testers and developers to easily create GUI tests
• Implemented automated GUI tests with QF-Test for stock trading software and PDF file comparisons
• Created comparison runs between different versions

Used technologies: QF-Test, Java, Jython

Assessment of the product, delivery, and AI organization with a realignment of operational excellence, target architecture, and AI-first operating model

Initial situation: The product and delivery organization showed structural weaknesses in efficiency, control, and collaboration. In addition, there was no clear target architecture for AI-driven product and organizational development. At leadership level, transparency about roles, responsibilities, and operational performance was limited.

Responsibility & approach:

• Analysis of the existing product, delivery, and organizational structures with regard to processes, governance, and controllability
• Evaluation of architecture and platform in terms of scalability, future readiness, and AI integration
• Development of a target picture for an AI-first product and delivery operating model
• Derivation of concrete measures to improve operational excellence and collaboration
• Sparring with the leadership team on structured organizational development

Results & impact:

• Creation of transparency around structural bottlenecks, performance, and decision logic
• Development of a target structure for a scalable AI-first product and delivery setup
• Improved decision-making ability and controllability at leadership level
• Creation of a solid foundation for downstream transformation measures
• Definition of concrete levers to improve efficiency, collaboration, and time to market

• SAP S/4HANA implementation
• Agile project & program management
• SAP S/4HANA main contact for business support for planning phase (Signavio, SolMan, Process Design Concepts)

• Implementation of MM and SD with integration of Diebold-Nixdorf cash registers

• Capturing the required processes (inventory management, procurement, sales, and cash register processes)

• Customizing MM and SD

• Project planning and control

• Master data upload and inventory recording using LSMW based on Excel spreadsheets

• Cash register data transfer via EDI and IDoc processing (MBGMCR and ACC_DOCUMENT)

• Creating extensive documentation for internal staff

• No middleware; instructing and training customer staff in customizing; SAP standard as prerequisite

• SAP ECC 6.0 modules MM, SD, FI

• 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

• conversion of a function-group-based Adobe Interactive Forms framework to an object-oriented Adobe framework for documents in transport/logistics and dunning (FI)
• Adobe Lifecycle Designer 11.0.1 for SAP
• creating new and troubleshooting existing forms, function modules, programs, classes, and methods
• maintaining Smart Forms
• document printing, email sending, and file archiving
• message control for deliveries, orders, invoices, proforma invoices, and transports
• ticket system: Jira
• communication: Microsoft Teams
• migrating customers to a new SAP framework
• handling incident and change request tickets
• software: SAP ERP 6.0, SAP_ABA 7.5G, S4CORE 1.05

• Responsibility for the specialist department
• Effective stakeholder management
• Management and prioritization of the backlog
• Resource and capacity planning
• Risk management
• Cost calculation and budget control
• Compliance with security guidelines and data protection regulations in a high-security environment (Bank regulations)
• Creation and monitoring of project timelines
• Planning and execution of workshops as well as the creation of user manuals
• Development and coordination of architecture maps with service providers and internal IT
• Creation and tracking of milestone plans
• Recording, analysis, and documentation of defects, including retesting until final approval for launch
• Coordination and execution of penetration tests
• Organization and management of User Acceptance Tests (UAT)
• Definition of Go / No-Go criteria for the launch
• Collaboration and organization of multinational teams

• Finalised several addon implementation projects as project manager, coordinating external service providers
• Implemented VAT reporting, e-invoicing, asset reporting, drug reporting to governmental authorities
• Played key role as business solution design specialist in an S/4HANA implementation project across PP-PI, eWM, QM, PM, IM, MM, SD and other logistic areas
• Designed organizational structures and processes in all logistic areas
• Developed and proofread business blueprint, managed implementation, test preparation and migration

• IT services for the administration of the SAP® systems NETZ/Sales, BW, Core, Portal
• Administration of SAP® authorizations and users via central user administration (ZBV) in SAP® Solution Manager
• Setup and further development of SAP® authorization roles
• Role assignment according to requests
• Creation, change, and deletion of users
• Incident handling and error analysis (e.g. authorization trace, debugging in test systems)
• Cooperation with the SAP® development team on new implementations and process changes
• Special tasks
• Execution of Privileged User Management (PUM) 2023–2025 using Security Bridge
• Decommissioning of the SAP® Core system and migration to S/4HANA

• SAP integration technical consultant
• Internal consultant/developer for SAP ABAP developments (ECC) in MM/SD/PP/HCM/QM/FI modules
• SAP Fiori/UI5 new development and application management services
• Account administrator for all applications in SAP BTP
• New development, enhancement, and maintenance of SAP SapScript, Smart Forms, and Adobe Forms
• Responsible for the SAP HCM module
• Certified Microsoft Power Automate Developer
• Certified Microsoft Azure AI Engineer

• Consulting, planning, and adapting (extension and rebuild) of the existing test framework to cover necessary test cases as part of quality assurance for initiative implementations
• Executing cross-team manual test cases during regular sprint cycles
• Setting up test automation
• Advising front-end and back-end development on quality assurance aspects
• Building a framework for end-to-end test cases
• Performing software quality assurance across various projects within a program
• Supporting the creation of test cases
• Coordinating within the team with all relevant stakeholders

• AIX/Linux system administrator: deployment of LPARs (Logical Partitions) for SAP Kernel Development
• C/C++ SAP kernel development and integration to SAP HANA Database
• C/C++ programming and software integration, support for SAP kernel on AIX system; development and testing on SAP VDI
• Example: development of the ABEC Tool (AIX Build Environment Checker) to create SAP build environments for debugging process and benchmarking
• Benchmarking and test execution of SAP kernels (test from the communication to the SAP HANA Database and to SAP NetWeaver) on AIX
• Automate the SAP kernel build via Jenkins and benchmarking over crontab jobs
• New C/C++ compiler design and testing (based on Clang++ and LLVM)
• Customer ticket handling to resolve SAP kernel bugs and build failures
• SAP kernel development with Rust programming language, migrating some sub-kernel projects from C/C++ to Rust because of Rust's memory safety model, ownership system, and concurrency features
• Refactoring selected components in Rust and integrating them with existing C++ codebase via FFI