Backend system and web client for exchanging electricity meters for utility providers

Design and implementation of a system to control the entire process for new, removal, and exchange operations of electricity meters by external service providers for a utility company

Automated retrieval of orders and available devices via defined interfaces (e.g. from SAP)

Orchestration of process steps (assigning meters, processing meter data, sending updated information back to the source system) using a Spring Boot backend

Provision of a React-based web client for operational tracking and control of orders, e.g. to continue failed process steps or resend notifications

Designed and implemented a Go-based backend to provide system data from an Ubuntu-based onboard computer

Forwarding multiple camera streams for a 360° view of a boat

Migrated and optimized an existing Python project in terms of performance and architecture

Aggregated local operating system information, formatted it, and forwarded streaming data to connected clients

Designed and developed a system for provisioning, uniquely labeling, and group-based management of biological sample collection kits with subsequent analysis capability

Mapped the entire process chain from creating individual kits through assignment to defined groups to analysis

Implemented the backend in Go with API key and JSON Web Token authentication

Persistent storage in PostgreSQL; stored uploaded files on the file system and served them via the API

Developed a backend in Golang for structured documentation and processing of orders in a craft business

Mapped the entire documentation process and provided all information via an API

Authentication using API keys and JSON Web Tokens

Persistent storage in PostgreSQL; stored documents and files on the file system with access via the API

Migrated an existing Lumen API to Laravel for managing access and authorization processes for parking garages

Performed maintenance tasks and fixed existing bugs

Data persistence in MySQL

Redesigned and optimized the PHP-based web frontend by moving HTML styles into central CSS files

Implemented new modules, views, and backend functions

Design and implementation of a command-line tool for creating and validating JSON Web Tokens using different encryption algorithms

Interactive input and parameter handling with output of the generated or verified tokens directly in the command line

Maintenance, further development, and new development of production and service tools in Delphi with Firebird SQL databases

Analysis and fixing of reported bugs as well as extension of existing functions and implementation of smaller new features

Design of user interfaces with DevExpress

Design, planning, and implementation of new applications including new forms and modules in close collaboration with manufacturing and service