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.

Conception and development of Angular modules for managing and visualising gas portfolio data for a German energy supplier — with NgRx state architecture, RxJS-based data stream processing and REST API integration into the .NET backend. Dashboards for contract data and consumption analytics replaced manual reporting processes and provided data-driven decision foundations for the portfolio management team.

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 a modular ERP and e-commerce platform for Babylon — an online shop specialising in historical newspapers and antiques. Built with Angular frontend, Node.js backend, MongoDB database layer and GCP cloud infrastructure for centralised management of product catalogue, order processing and inventory. The platform replaced manual workflows and established a scalable operational foundation for the online business.

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.