Karl F.-Managing Director ONECEPT GmbH | Software Engineering, Data & AI
Check rate
Experience
Managing Director
ONECEPT GmbH
Full-Stack Web Developer
ONECEPT GmbH
ONECEPT Website
Development and implementation of the onecept.at website with React/Next.js. Focus on responsive web design, high-performance component structure, basic SEO optimization, and technical deployment.
Technologies: React, Next.js, TypeScript / JavaScript
Full-Stack Web Developer
ONECEPT GmbH
ONE-PATH Website
Development and implementation of the one-path.one website with React/Next.js. Focus on responsive web design, high-performance component structure, basic SEO optimization, and technical deployment.
Technologies: React, Next.js, TypeScript / JavaScript
Full-Stack Software Engineer
ONECEPT GmbH
ONE-ACADEMY
Training platform focused on clear learning paths, centralized knowledge sharing, and scalable content.
Technologies: ASP.NET Core Web API, React, .NET C#, TypeScript / JavaScript
Atlassian Consultant
VBV – Betriebliche Altersvorsorge AG
Atlassian Consulting & Implementation
Extensive project in the customer's Atlassian environment, including consulting on best practices, analysis, creation of work packages, conception and implementation, workshops, and the setup of a revision board including automations. In addition, potential Atlassian apps for customer processes were identified, Confluence page templates were created, and a structural concept for departments and teams in Confluence was developed.
.NET Software Engineer
CIO.pro e.U.
ERP Extension with External API Integration
Extension of an existing ERP system in which the ERP executes automated API calls to an external system to reliably transfer order data.
Technologies: .NET C#
.NET Software Engineer
CIO.pro e.U.
Automated Processing of XML Invoices
Development of a process for automatically importing and validating XML invoice formats (e.g., ebInterface, UBL, EBOR) and transferring them in a structured format to an ERP system.
Technologies: .NET C#
Full-Stack Software Engineer
ONECEPT GmbH
ONE-HUB
Development of a scalable Data Hub within the ONECEPT ecosystem for data integration and structuring. Focus on modular architecture, API integration, and Blazor-based frontends. Integrated AI features such as semantic search (RAG), role & user management, flexible deployment options (Cloud or On-Premise), and GDPR-compliant use. Ideal for knowledge management, data analysis, and cross-team project work.
Technologies: ASP.NET Core Web API, .NET Blazor, MudBlazor, SignalR, .NET C#, JavaScript, PostgreSQL, Playwright.NET, xUnit
Full-Stack Software Engineer
Techexx GmbH
Kiway
Architecture, design, and implementation of an extensive web application for mapping internal processes with AI. Independently handled the implementation of the frontend, backend, data model, and deployment in Azure, including the migration of the existing self-hosted environment to the Azure Cloud.
Technologies: ASP.NET Core Web API, .NET Blazor WASM, MudBlazor, SignalR, .NET C#, JavaScript, Azure Container Apps, Azure Storage Accounts, PostgreSQL, Playwright.NET, xUnit
Software Data Engineer
Mediashop GmbH
MS SQL Server Upgrade
Migration from MS SQL Server 2016 to 2022, including SSIS and SSAS. Adaptation of database drivers and development of new logic to account for changes in the returned data types caused by the updated driver.
Full-Stack Software Engineer
Private Client
FitMatch
Development of an app for connecting sports enthusiasts, focusing on shared activities and social interaction. Independently involved in concept development, UX/UI, frontend/backend development, market analysis, and strategy. The app combines fitness, community features, and matchmaking, offering premium features, event bookings, and personalized fitness data.
Technologies: ASP.NET Core Web API, ASP.NET MVC, .NET MAUI Blazor, MudBlazor, .NET C#, JavaScript, Azure App Services, Azure PostgreSQL
Software Data Engineer
Mediashop GmbH
ETL & Reporting Processes
Development of SSIS pipelines, reporting structures with PowerBI, and maintenance of the internal DWH. Responsible for automating data processes, creating reports for management and departments, and increasing the efficiency and quality of data processes to support data-driven decisions.
Technologies: SSIS, SSAS, .NET Console App, .NET C#, PowerBI
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, and Marketing.
Summary
At ONECEPT, we combine software development, data engineering, and artificial intelligence with specific business requirements.
With more than 10 years of experience in software development, data engineering, and digitalization projects, we develop customized, scalable, and maintainable solutions for companies.
Our services range from conception and architecture to technical implementation and production operations. We develop customized B2B applications, modernize existing systems, integrate data and interfaces, and implement modern AI and knowledge solutions.
With ONE-CODE, we bundle our technical implementation expertise. We support companies from the initial requirement through architecture, development, and testing to deployment, monitoring, and ongoing development.
Skills
Backend
- C#
- .Net
- Asp.Net Core
- Python
- Elixir
Frontend
- Blazor
- React
- Next.Js
- Angular
- Typescript
- Javascript
Apis, Real-Time & Messaging
- Rest
- Graphql
- Signalr
- Rabbitmq
Databases & Data Access
- Postgresql
- Microsoft Sql Server
- Azure Sql-Datenbanken
- Redis
- Qdrant
- Entity Framework Core
Cloud & Platform
- Microsoft Azure
- Azure Devops
- Docker
Ai Frameworks & Platforms
- Semantic Kernel
- Openai
- Anthropic
- Mistral
- Ollama
Quality Assurance & Testing
- Playwright
- Xunit
Observability & Telemetry
- Grafana
- Grafana Alloy
- Grafana Tempo
- Grafana Loki
- Prometheus
- Prometheus Node Exporter
- Prometheus Alertmanager
- Cadvisor
- Opentelemetry
Data Solutions & Cloud
- Azure Data Factory
- Apache Spark
- Apache Airflow
- Azure Synapse
- Talend
- Pentaho
- Power Bi
- Microsoft Fabric
Data Warehousing & Business Intelligence
- Microsoft Integration Services
- Linkedserver & Stage
- Power Bi Semantic Models
- Dbt
Big Data And Data Platform Databases
- Data Lake
- Delta Lake
- Lakehouse
Working Style
- Clear, Structured, Solution-Oriented
- Independent In Execution
- Communicative At Interfaces – With Technical Depth And Systems Thinking
Languages
Certifications & licenses
Microsoft Applied Skills: Agenten mit autonomen Fähigkeiten verbessern
Microsoft Applied Skills: Entwickeln einer ASP.NET Core-Webanwendung, die eine API nutzt
Microsoft Applied Skills: Entwickeln von generativen KI-Apps mit Azure OpenAI und Semantic Kernel
Microsoft Applied Skills: Generieren von Berichten mit KI-Forschungsmitarbeitern
Microsoft Applied Skills: classes, properties, and methods in C#
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Karl is based in Graz, Austria and prefers 100% remote projects.
Karl speaks the following languages: German (Native), English (Advanced).
Karl has at least 4 years of experience. During this time, Karl has worked in at least 6 different roles and for 6 different companies. The average length of individual experience is 4 months. Note that Karl may not have shared all experience and actually has more experience.
Based on recent experience, Karl would be well-suited for roles such as: Managing Director, Full-Stack Web Developer, Full-Stack Software Engineer.
Karl's most recent position is Managing Director at ONECEPT GmbH.
In recent years, Karl has worked for ONECEPT GmbH, VBV – Betriebliche Altersvorsorge AG, CIO.pro e.U., Techexx GmbH, and Mediashop GmbH.
Karl is most experienced in industries like Information Technology, Retail, and Sport. Karl also has some experience in Banking and Finance and Education.
Karl is most experienced in business areas like Information Technology, Product Development, and Business Intelligence. Karl also has some experience in Marketing.
Karl has 5 certificates. Among them, these include: Microsoft Applied Skills: Agenten mit autonomen Fähigkeiten verbessern, Microsoft Applied Skills: Entwickeln einer ASP.NET Core-Webanwendung, die eine API nutzt, and Microsoft Applied Skills: Entwickeln von generativen KI-Apps mit Azure OpenAI und Semantic Kernel.
Karl is immediately available full-time for suitable projects.
Daily rate distribution
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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