UX Design Expert in Düsseldorf

• Contributed to the development of an advanced RAG AI Chat application that integrates multiple LLM models, enabling users to seamlessly switch between models based on specific tasks. This improved the user experience by providing tailored, efficient solutions for various use cases, such as event scheduling, booking systems, and complex task management.
• Participated in designing and implementing a robust backend architecture using Spring AI, enabling advanced AI-driven capabilities like intelligent task automation, language processing, and contextual recommendations. Leveraged Spring AI Tools and Advisors to enhance the performance and decision-making of the AI models.
• Collaborated on the integration of vector databases to support embeddings, enhancing the app's ability to understand user queries and perform actions based on complex, real-time data inputs.
• Contributed to the development of a seamless, user-friendly front-end interface using React with TypeScript support, ensuring a modern, responsive, and scalable user experience across platforms.
• Assisted in implementing state management with Redux RTK for efficient data flow and real-time updates, optimizing the overall user experience in dynamic scenarios such as scheduling and task management.
• Partnered with stakeholders to define feature requirements, helping ensure that the app could scale to meet evolving business needs and integrate with other systems like calendar and email services. Worked alongside cross-functional teams, including data scientists and UI/UX designers, to fine-tune AI models and ensure alignment with project goals.
• Contributed to ensuring end-to-end system performance, security, and compliance by helping integrate authentication mechanisms, role-based access control, and secure communication protocols in both backend and frontend layers.

Technology Stack and Key Contributions:

• Java / Spring Boot / Spring AI: Developed backend services leveraging Spring AI for intelligent responses, task automation, and complex workflows.
• React / TypeScript: Built intuitive user interfaces with React and TypeScript, ensuring a smooth and scalable frontend.
• Redux RTK: Managed application state with Redux RTK for optimized state management, enabling dynamic, real-time data updates.
• Vector Databases: Integrated vector databases (pgVector) for embedding support, improving AI model performance in handling complex queries.
• PostgreSQL / Redis: Managed persistent and temporary data with relational and in-memory data stores, ensuring data integrity and speed.
• Kafka: Utilized Apache Kafka for event-driven communication and seamless integration between microservices.
• Spring Security: Ensured the security of backend services with robust authentication and authorization mechanisms.
• CI/CD & DevOps: Integrated continuous integration and deployment pipelines to ensure rapid and secure deployment of features and updates.

• Responsible for the entire software architecture of the parental allowance portal
• iOS and Android app with React Native and Expo, incl. push and OTA updates
• Store releases via App Store Connect and Google Play Console
• TypeScript monorepo for app, website and backend, web with Next.js and Tailwind
• Own promo, voucher and discount engine with contact and segment logic
• Payments via RevenueCat and in-app purchases, authentication with BetterAuth
• REST APIs based on OpenAPI, PostgreSQL with Prisma and Drizzle
• Self-hosting on Hetzner with Docker, Coolify, Terraform and GitHub Actions
• Tests with Vitest, Playwright and visual regression via Chromatic
• Observability via Grafana Cloud and error tracking with Sentry
• Performance marketing via Meta Ads, measured with custom event tracking
• Grew the product to 20,000 app users with a purchase rate of almost 12 %
• Managing Director since 04.2025, responsible for product and technology

• Full product responsibility from a business perspective: requirement analysis, UX design, product strategy, and go-to-market implemented without an internal dev team using fully AI-supported development (Claude Code / Anthropic)
• Technical differentiation: KRITIS-compliant air-gapped deployment (Windows/NSIS), GDT interface for PVS integration, DATEV-LODAS export for payroll
• Managed pilot operation with initial external client (Dormagen medical practice): structured requirement gathering, test support, error analysis, and release management
• Developed rollout and sales strategy for market entry in the segment of private practices and small medical centers
• Human-in-the-Loop development principle: business decision → AI implementation → manual review → approval → release – each sprint documented in Jira (TIME project), every change traceable via co-authored commits
• Product outcome: Tauri/Rust desktop app with GDT watcher, multi-tier model (Starter/Professional/Enterprise), cloud mirror on Hetzner/Traefik, complete ISMS framework based on ISO 27001 and BSI basic protection as product foundation
• Direct method validation for the test manager role: hands-on experience with quality assurance of AI-generated products from a user perspective, review gate discipline, release approval under GDPR and the EU AI Act

• Creation of a design system incl. guidelines in Figma
• Migration of existing Sketch components to Figma
• Health app B2C
• Tools: Figma, Sketch, Zeplin

• Clients: Caravaning Association, Suzuki Motorcycles Germany, Suzuki Press
• Main client responsibility, strategic and operational customer leadership
• UX/UI design, digital campaign implementation, web development and e-commerce (Amazon Brandstores, Otto, etc.)
• Budget management, print and digital media, HTML5 and CSS3 integration, art direction

• Conceptualization, UX design, and prototype development of custom SAP Fiori® apps
• Reviewing developed apps for usability and compliance with SAP Fiori® design guidelines
• Producing videos for internal knowledge transfer and internal communication for Schaeffler Technologies AG & Co. KG

• Led end-to-end delivery of WHOacademy.org, defining product vision, success metrics, and execution strategy for a global learning platform built on Open edX and hosted on Azure.
• Drove program execution across cross-functional teams (UX, frontend, backend, mobile, DevOps, content), coordinating delivery of web (JavaScript) and iOS/Android applications through structured CI/CD pipelines, ensuring predictable, high-quality releases.
• Managed senior stakeholders across multiple WHO entities and external partners, aligning priorities, roadmap, and KPIs to measurable outcomes including platform adoption, performance, scalability, and learner engagement.
• Oversaw vendor and partner performance, ensuring compliance with SLAs, timelines, security, and quality standards.
• Led complex multi-organization migrations (IARC, PAHO, WPRO, OpenWHO), managing course, user, and data transitions with minimal disruption and clear risk governance.
• Provided post-launch Level 2 production support, collaborating with Global Service Desk teams and leveraging ServiceNow for incident, problem, and change management, ensuring platform stability and continuous improvement based on operational metrics.

Various projects with focus areas:

• Growth (internationalization)
• Digitization (processes and business models)
• Conflict resolution (mediation, restoring productivity and employee satisfaction)
• Process optimization

• Automotive UX/UI design for a show car
• Idea generation and research

• Conceptualizing and designing responsive websites and mobile versions
• Developing landing pages focused on conversion and user guidance
• Collaborating with clients and implementing customized design solutions
• Integrating and working with CRM systems

• As a UX/UI Designer & Digital Growth CRM Marketing Campaigning consultant, I advise companies on improving their digital presence.
• I develop user-friendly designs.
• I support digital projects.
• I accompany digitization in cooperation with a team of Web & App Developers.