E-Invoicing Expert in Germany

• Founder of CheironX: AI-supported GRC management (ISO 27001, BSI IT-Grundschutz, TISAX, DORA)
• Strategic focus on Agentic AI and GenAI for modern IT Governance, Risk & Compliance Management
• IT interim management and strategic consulting

• Managed Microsoft Cloud Accelerator Factory (CAF) programs for global enterprise customers, ensuring Azure cloud implementations aligned with security, governance, and compliance best practices, including ISO 27001-aligned controls and cloud security frameworks.
• Managed complex global enterprise transformation programs with strong focus on project delivery, financial governance, budget control, planning, risk management, and executive reporting, ensuring delivery within scope, timeline, and budget.
• Led the implementation of e-invoicing solutions for Nestlé, coordinating finance, IT, business stakeholders, and external providers to ensure successful integration, testing, rollout, and delivery of electronic invoicing processes.
• Managed an Oracle-to-PostgreSQL database migration, coordinating technical teams, application owners, testing activities, dependencies, risks, and cutover planning to ensure a controlled and successful transition.
• Led cross-functional programs involving finance and payment-related processes, enterprise platforms, and system integrations, with strong stakeholder management across business, IT, vendors, and senior leadership.
• Delivered transformation programs in FMCG environments, including Nestlé, managing complex international stakeholder structures, third-party providers, governance, RAID management, and business-critical dependencies.

Project: Introduction of statutory-compliant electronic invoicing (outbound, Germany) in SAP for an international technology group.

• Project management: Planning, steering and reporting of the E-Invoicing outbound rollout across all affected business areas, including budget and resource coordination.
• UAT: Structured user acceptance test with key users per business area, test cases per invoice scenario, and consolidated test results for decision making.
• Defect management: Handover and tracking of defects in Jira, including validation of the generated invoices against the statutory schemas.
• Cutover, go-live and hypercare: Readiness checks and cutover planning aligned with the statutory deadlines, coordination of go-live and stabilization during hypercare.
• Stakeholder management and reporting: Alignment with Finance, Tax, business departments and IT, preparation of status reports and decision papers, and consistent follow-up of open items.
• Change management and documentation: Communicated process changes to the business departments, enabled key users, and created process and compliance documentation to ensure traceability and audit readiness.

• Defined S/4HANA finance solution architecture and led full project lifecycle — Blueprint through Hypercare — for global rollout.
• Designed global finance templates and COPA characteristics, harmonizing financial reporting across business units.
• Implemented role-based authorizations, SOD controls, and master data governance; managed provisioning and training for 200+ users.
• Coordinated cross-module integrations (MM, SD, PP) and third-party systems (Salesforce, SAP DRC, E-Invoicing), reducing month-end close from 5 days to 2 days.
• Prepared functional specifications, supported ABAP development, and drove problem management practices that reduced recurring incidents.

Gronic Ident & Sign

Core technologies: Android, Jetpack Compose, Retrofit, Regula Document Reader, Adobe Sign

Android app on dedicated devices for identifications and electronic signatures at the PoS

• Responsible for the concept, planning, and delivery of product development for GetMyInvoices 2.0 and its subcomponent InvoiceRails
• Independently handled all aspects of the project, including concept development, writing ticket specifications, and coordinating developers
• Created, managed, and prioritized tickets to ensure all tasks were completed on time and to a high standard
• Conducted and/or coordinated tests and ensured the proper implementation of developed features and functionality
• Worked closely with developers to clarify technical requirements and ensure implementations met specifications
• Regularly reported on project progress and documented key decisions, changes, and risks
• Took the lead on all topics related to e-invoicing and Peppol, especially regarding the InvoiceRails component
• Provided internal guidance and shared knowledge about e-invoicing and Peppol with other teams and departments
• Tracked market trends and new developments in e-invoicing and Peppol to continuously adapt the product strategy
• Ensured the products’ long-term scalability and adaptability to future technological and legal changes in e-invoicing

• Management of IT/digitalization projects within the central PMO
• PMO knowledge document & management presentation (governance, methods)
• Requirements training & e-invoicing summary for project submitters
• Market analysis of hybrid tools & PMO checklists/governance
• Stakeholder management (IT, library, management)

• Financial accounting: daily general ledger entries and month-end closing

• Preparation of FY 2024 financial group statements (subunits KF, KNL, KAU, KCH)

• Preparation of physical inventory for KF with inventory instructions for Logistic

• Further development of ERP Finance processes integration with MS Dynamics BC 14

• Implementation of electronic invoice verification and Multi Cash banking software

• Expansion of sales and e-commerce controlling toolbox and processes

• Preparation of budgets 2026, 2027, 2028, including investment plan, cost accounting

• Preparation and commentary on monthly reports for sub-units and Group

• Preparation of weekly financial plans, cash flow and liquidity plans

• Further development of sales controlling, focusing on margins & product profitability

• Creation and integration of accounting workflows for MS Dynamics

• Leadership focus: Stabilization of the finance team and clear scope of work responsibility

• Communication with banks, auditors, tax advisors, and tax authorities

• Complete and accurate monthly reporting for each business unit and the KF Group

• Preparation 2024 financial statements for KF Germany, KNL, KAU, and KNL with audit opinion

• Detailed setup and preparation of the KF 2026 budget for the management and shareholders

• Weekly cash flow planning coordinated with the management and shareholders

• Turnaround in net sales and EBIT from September 2025 onwards – stable growth

• Leadership & change through consistent, data-driven KPIs

• Support digitalization and transformation projects with a focus on functional coordination, requirements structuring and test management
• Supported the introduction of SAP RE-FX and an electronic invoice receipt service at the City of Munich
• Contributed to the digitalization of HR processes and supported coordination between departments, project participants and implementation teams

Design and implementation of a compact ERP, CRM, accounting, and production-planning platform for a German food manufacturer. The system replaces Rechnung11, self-built Excel sheets, and manual processes for fewer than 10 internal users.

• Designed and implemented the full platform architecture as sole architect and developer.
• Built modules for customer management, B2B order handling, invoicing, production planning, and accounting support.
• Implemented DATEV export, ZUGFeRD/XRechnung e-invoicing, FinTS bank statement synchronization, and GoBD audit trail concepts.
• Used AI-supported workflows for prototyping, test support, and implementation acceleration while retaining full architecture, review, testing strategy, and technical ownership.

Technology: Java 23, Spring Boot 3, Spring Data JPA, Spring Security, Vue 3, TypeScript, PostgreSQL, Flyway, REST, OpenAPI, JWT, TOTP, RBAC, DATEV, FinTS, ZUGFeRD, XRechnung, GoBD, JUnit, Mockito, Testcontainers, Playwright, Docker, GitLab CI/CD

• 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

• Replacement and renewal of the existing client PCs with an upgrade to Windows 11 and mobile workstations with laptops and docking stations
• Introduction of Office365 with OneDrive use
• Introduction of e-invoicing with DATEV accounting software
• Revision of the standard office applications in daily use
• File storage in SharePoint instead of local data storage
• New authorization structure for users
• Use of Microsoft accounts to synchronize profiles
• Reorganization of the document scanning process with storage in SharePoint
• New backup concept in addition to the Microsoft cloud solution
• Introduction of new data structures: review and separation of data into active, inactive, private, business
• Simplification of processes
• Increased data security and improved security
• Permanent data availability at all internal and external workplaces

• Owned product delivery for document automation and workflow platform used across multiple legal jurisdictions
• Led integration across 6+ systems using API-based data exchange and structured data mapping
• Partnered with engineering on data models, document generation workflows, and system orchestration
• Evaluated LLM-assisted document automation opportunities to reduce manual drafting
• Built functional prototypes to validate workflow and product concepts
• ~2x increase in case processing throughput
• Enabled multi-state rollout of platform capabilities
• Reduced manual document generation and operational bottlenecks by 80%

• Concept and full-stack development of an app for parking space booking & management (Hahn Airport)
• From requirements to implementation and deployment; AI-supported development (Claude Code)