Alexander Wiegenstein

Technical ownership of architecture and implementation of a cosplay community and marketplace platform — with Next.js/React frontend, Hono API backend on GCP Cloud Run, Supabase/PostgreSQL database layer, and infrastructure-as-code via Terraform. Establishing CI/CD standards, code reviews, and scalable deployment architecture in an agile team.

Full-stack development in a 15-person Scrum team to replace a legacy system landscape for power plant management and dispatch scheduling at RWE Supply & Trading — with Angular frontend, .NET/C# backend, GraphQL API and microservices architecture on AWS, secured via Microsoft Entra ID. The new platform enabled centralised real-time data management and significantly reduced manual coordination processes in plant dispatch.

Conception and development of Angular modules for centralised management of medical master data for the Servicegesellschaft der Bayerischen Urologen — with NgRx state architecture, RxJS-based data stream processing and REST API integration into the .NET backend. The platform enables authorised administrators to maintain structured profiles for medical professionals, institutions, events and products, establishing a digital foundation for efficient data management in the urological healthcare environment.

Modernisation of a 20-year-old online shop into an Angular Progressive Web App for Geschenkzeitung.de — with NgRx-based component state management, Node.js REST API backend and MongoDB database layer on GCP Cloud Run. The PWA significantly improved load times and mobile UX; DHL shipping integration automated order processing and reduced manual fulfilment effort.

Full-stack development of the bespoke ERP and inventory management system Babylon for Geschenkzeitung.de — with Angular frontend, Node.js backend, MongoDB database layer and containerised deployment on GCP Cloud Run. The system automates order processing, warehouse management, DHL-integrated shipping logistics and accounting exports for over 2 million items and approximately 20,000 orders per year, fully replacing manual workflows.

Development and enhancement of ExtJS frontend modules and Symfony backend components for a digital advertising management platform at RTL — with REST API integration, MySQL database layer and agile collaboration in an interdisciplinary development team. Implementation of campaign management and reporting features for digital advertising formats.