Linux Experts in Leipzig

• Extension of OSGi modules in a complex communication solution
• Debugging communication with Wireshark and remotely in the JENS test environment
• Migration of tests from TestNG to JUnit 5 with Mockito and AssertJ
• Updating vulnerable dependencies and improving code quality
• Changes to the Vaadin frontend
• Increasing test coverage

• Overall coordination of service providers for all infrastructure topics at a production site being set up in Baden-Württemberg
• Design and finding solutions for internet connectivity, building office communication networks, setting up WLAN in production and administration buildings, IP address management, password policies, time tracking, access control systems, backup strategies, emergency power planning, operating concepts, cost planning, event management, workplace setup including laptop/mobile phones/telephony, remote support, print servers
• Selecting suitable external service providers and planning to meet needs for spare parts, repairs, on-site service, network and workplace support including on-site system replacement by providers
• Choosing suitable external service providers for facility management and building technology (fiber optic connections, data center infrastructure, cable ducts etc.)
• Coordination with clients and service providers
• Escalation management, schedule control
• On-site presence for service meetings and managing service providers

• Development of a B2B shop based on Magento 2
• Plugin research and implementation, e.g. custom prices per customer
• Implementation of individual customizations
• Quality assurance
• Release management
• Collaboration with the marketing team
• Technologies: Magento 2, CSS, JavaScript, PHP, Docker, Git

• Maintenance and system handover
• Planning and carrying out core and plugin updates
• Developing a plugin to extend invoice creation and payment via Flow Builder

• Implementation of an API for customers to provide NFS shares in the cloud
• Creating Kubernetes operators and services with REST APIs in Go
• Using LinuxKit for provisioning VMs

Further development of a software solution for managing test requests and test notifications according to §106d SGB V for the Hamburg Association of Statutory Health Insurance Physicians.

• Developed numerous features, performance optimizations, refactoring, error analysis
• Refactored the dev container setup
• Optimized the GitLab CI build pipeline
• Contributed optimizations to the team workflow

• Tech-Stack: Python, Qt, tensorflow.js, plotly, Angular, TypeScript, HTML, CSS, Git

• Led the development of a complex geospatial data platform, engineering an end-to-end system for processing and analyzing high-resolution aerial imagery.
• Engineered a scalable backend responsible for on-the-fly map tile serving and running complex data analysis queries using PostGIS and Python.
• Developed and trained custom computer vision models using Python, PyTorch, and YOLOv8 to perform object detection and segmentation on large-scale datasets.
• Built modern, responsive user interfaces and data visualization dashboards using Next.js, TypeScript, and React.
• Gained practical expertise in geospatial libraries such as GDAL and Rasterio for processing and manipulating raster and vector data.
• Managed the entire project lifecycle, from initial technical architecture and database design to final deployment using Docker.

• Took over management of the company

• Lead programmer, architect and deputy product owner
• Completed transition from zPDV to STEP
• Ensured quality of C++ and Perl sources through automated and manual checks
• Supported resolution of incidents and errors in testing
• Implemented batch for supplementary assignment of payment run numbers
• Implemented batch for distribution of SGB 2 information to the central payment unit
• Supported replacement of Solaris with Linux
• Upgraded gcc from 7.4 to 9.3
• Programmatically generated Makefiles from Borland projects for builds
• Extended funding data with new attribute “internship travel cost indicator”
• Programmatically generated XSD and WSDL files from IDL definitions
• Represented the product owner when needed
• Implemented batch for one-time payment processing
• Developed generator for Liquibase files
• Implemented and maintained regular anonymization of production data
• Supported migration from SLES 12 to SLES 15
• Supported introduction of mutual TLS
• Implemented batch for sending deletion impulses to EDA BE
• Organized script directory structure
• Investigated potential introduction of String-Latin and implemented minimal solution
• Remediated security findings identified by CheckMarx
• Supported PAP recalculations and general change notices
• Converted ERP interfaces from SOAP to REST
• Planned technical and business topics such as register modernization, cash register security, training costs, four-eyes principle

• Analysis, redesign and functional specification for a software system to record, process and reimburse all claims in the girocard scheme
• Analysis, conception and execution for a bidding for the introduction and implementation of Identity & Access Management, Masterdata Management and Document Management Systems
• Project management for the software development project for the EKS-Net platform for the recording, processing and reimbursement of all claims in the girocard scheme
• Project management for the introduction of Identity and Access Management System, Master Data Management System and Document Management System
• Strategy consulting for digitalization of business processes
• Advice on payment transactions, compliance (PEP and sanction list checks) and risk analysis
• Design of data models and APIs

• Implementation and updates of various websites for:
• Puder + Consortio
• Feldenkrais Verena Tintelnot
• "Mely Kiyak hat Kunst" at the Maxim Gorki Theater
• Grunwald & Grundwald Architektur und Städtebau
• Wanderkino