Stefan Baust

Comprehensive technical consulting for optimal implementation of SAP Customer Checkout, including requirements analysis, solution design, and best practices for customer success.

Independently responsible for designing and developing critical payment solutions:

Complete architecture and implementation of terminal integrations for Clover, GlobalPay US/UK, and ACI Payments.

Self-directed development from prototype to production-ready solution, including extensive component testing.

Delivered fully documented and tested solutions to the client for final acceptance with payment providers.

Successful development of customized enterprise solutions:

SQL reporting with automated (S)FTP upload: Solely responsible for designing the data architecture and implementing the entire workflow.

VIP customer management: Developed a specialized plugin for automatic assignment of VIP discounts and credits in retail and food & beverage environments.

Managed all projects independently from requirements analysis through architecture and programming to delivery and support.

Strategic consulting and technical implementation leadership for SAP Customer Checkout, with a deep understanding of business requirements and technical possibilities.

Fully independently responsible for developing business-critical plugins and server applications:

Plugin for accelerated end-of-day closing: Reduced closing time by approx. 70%, providing significant operational advantages, especially at major events.

Pioneer development of the Waiter Teams Plugin: Independently conceived and implemented for the first deployment at Oktoberfest.

SQL-based reporting system: Complete architecture and implementation of a customized reporting framework.

Direct technical on-site support for clients, including rapid troubleshooting in real-time environments with high transaction volumes and direct coordination with stakeholders.

End-to-end responsibility for the entire development cycle from initial concept through architecture, programming, testing to documentation and maintenance of the solutions.

Worked as a developer on the core team of the SAP Customer Checkout POS system, adding complex features to the new Angular and SAPUI5-based frontend (NGUI).

Helped develop interfaces to integrate third-party systems, boosting the product's market relevance and flexibility.

Actively took part in architecture decisions and implemented shared design concepts.

Contributed to product quality and stability through code reviews, agile development processes (sprint planning, daily scrums, retrospectives), and continuous integration following CI/CD principles.

Collaborated effectively in an internationally distributed development team and documented implementations and architectures for sustainable knowledge transfer.

Supported the team part-time since 2021.

Helped build a networking feature for a trade show app that helped over 2,500 people connect; coordinated with external providers and implemented it on Android.

Implemented a mobile form management app and a web frontend using Ionic and AngularJS, integrated Keycloak as an OAuth2 provider, and worked in a Scrum team.

Played a key role in the Deep Map ™ WebSDK 2+, selecting technologies, designing the architecture, and reimplementing components with OpenLayers and TypeScript.

Connected third-party services (SOAP, REST) to sync user data between the website and the mobile app.

Automated the setup of trade show web apps, extended an Excel parser, and achieved almost full automation with Jenkins, leading to significant time savings.