Karl Forstner-Software / Data-Engineer
Check rate
Experience
Automated development of processes for XML invoice formats
CIO.pro e.U.
- Automated parsing and validation of XML invoice formats (e.g., ebInterface, UBL, EBOR)
- Structured transfer of data to an ERP system
- Implementation using .NET and C#
Founder | Software Engineer / Architect
Forstner Software Solutions e.U.
- Development of custom .NET and C# software solutions
- Modernization of existing systems from conception and development to cloud deployment in Azure
- Focus on high-performance, future-proof B2B software with AI-powered features
- Close collaboration with clients to optimize business processes and increase efficiency
Software Engineer
ONE-PATH Solutions | ONE-CODE
- Technical implementation of ONE-PATH as part of ONE-CODE.ONE
- Development of secure, scalable applications from prototypes to production-ready systems
- Platform architecture and programming
- Integration of data and knowledge
- Development of AI-powered solutions for everyday work
One-Hub development of a scalable data hub
Onecept GmbH
- Development of a scalable data hub in the ONECEPT ecosystem for data integration and structuring
- Focus on modular architecture, API connectivity, and Blazor-based frontends
- Integration of AI features such as semantic search (RAG), role and user management
- Flexible deployment options (cloud or on-premises) and GDPR-compliant usage
Kiway web application with AI
Techexx GmbH
- Architecture, design, and implementation of a comprehensive web application for internal process mapping with AI
- Independent implementation of frontend, backend, and data model
- Deployment in Azure including migration of the self-hosted environment
- Technologies: ASP.NET Core Web API, .NET Blazor WASM, MudBlazor, SignalR, Azure Container Apps, PostgreSQL, Playwright.NET, xUnit
Software Engineer
Techexx GmbH
- Designing, architecting, and developing business software based on ASP.NET Core Web API, Blazor WebAssembly, and PostgreSQL
- Programming in C# and JavaScript
- Data modeling and API integration
- Project coordination with Jira
- Deployment with Docker and Azure Container Apps
- Quality assurance through unit and integration tests (Playwright.NET, xUnit)
MS SQL Server Migration
Mediashop GmbH
- Migration from MS SQL Server 2016 to 2022, including SSIS and SSAS upgrade
- Adjusting database drivers and developing new logic for changed data type returns
FitMatch App Development
Private Client
- Developing an app to connect fitness enthusiasts, focusing on shared activities and social interaction
- Contributing to concept, UX/UI, frontend and backend development, as well as market analysis and strategy
- Integrating premium features, event bookings, and personalized fitness data
- Technologies: ASP.NET Core Web API, .NET MAUI Blazor, MudBlazor, Azure App Services, Azure PostgreSQL
Software Data Engineer
Mediashop GmbH
- Enhancing the data warehouse and automating data processes with SSIS and SSAS
- Developing new logic to adapt to changes in data type returns
- Creating management reports and dashboards with Power BI
- Optimizing SQL queries and automating reporting processes to improve efficiency
- Maintaining the internal DWH
ETL & Reporting Development
Mediashop GmbH
- Developing and automating SSIS pipelines and reporting structures
- Creating reports with Power BI and maintaining the internal DWH
- Increasing the efficiency and quality of data processes to support data-driven decisions
Industry Experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Retail, and Sport.
Business Area Experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Business Intelligence, Project Management, Quality Assurance, and Strategy.
Summary
Karl Forstner combines modern software development with data engineering and technical system architecture. His focus is on developing scalable platforms, applications, ETL pipelines, and data solutions, as well as integrating structured and unstructured data into productive enterprise systems. As the managing director of ONECEPT GmbH and the main developer of the ONE-HUB product, he guides projects from conception through architecture to production-ready cloud and on-premises deployments.
Skills
- .Net / Asp.Net Core
- Fullstack Development
- Software Architecture
- Blazor / C#
- End-To-End Implementation Of Modern Web Applications
- Modular, Scalable System Designs
- Javascript / Rest Apis
- Postgresql / Mssql
- Etl Pipelines
- Api Development
- Data Integration And Transformation Processes
- Rest Apis And Ssis / Ssas
- System Integration
- Docker / Azure
- Hub Systems
- Ai Integration
- Signalr / Playwright.Net
- Integration Of Data, Knowledge, And Processes
- Ai-Powered Features For Businesses
- Xunit
Languages
Certifications & licenses
Microsoft Applied Skills: Improving Agents with Autonomous Capabilities
Microsoft Applied Skills
Microsoft Applied Skills: Classes, Properties, And Methods In C#
Microsoft Applied Skills
Microsoft Applied Skills: Developing an ASP.NET Core web application that uses an API
Microsoft Applied Skills
Microsoft Applied Skills: Developing generative AI apps with Azure OpenAI and Semantic Kernel
Microsoft Applied Skills
Microsoft Applied Skills: Generating Reports with AI Research Assistants
Microsoft Applied Skills
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
Similar Freelancers
Discover other experts with similar qualifications and experience
Experts recently working on similar projects
Freelancers with hands-on experience in comparable project as a Automated development of processes for XML invoice formats
Nearby freelancers
Professionals working in or nearby Gleißenfeld, Austria
