Karl Steinzer - Senior .NET Developer for Blazor Systems

Recommended expert

Horitschon, Austria

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Experience

Jan 2017 - Present

9 years 8 months

Freelancer

Implementation of a Blazor application and Windows services with RabbitMQ, MS Orleans, SignalR and Powershell to manage automatic deployments and updates in VMware
Development of a WPF application with C# and REST API integration (object annotation) for a German automotive company in distributed teams (Austria, Germany, Russia, India) with the following tasks:
Requirement analysis, design, implementation, branching/merging, code reviews, optimizations, testing, bug fixing
Integration of payment terminals and card readers into a vending platform using .NET Core
Frontend development in Angular & AngularJS (SignalR and REST API integration, TypeScript, HTML, CSS)

Jan 2014 - Dec 2016

3 years

JetTicket Software GmbH

Further development of the webshop (VB.NET) with payment integration
Development of C# tools for updates and maintenance
Design of WCF services as a database interface to the legacy system

Jan 2012 - Dec 2013

2 years

DevTeamOne

Analysis, design and implementation of large frontend projects with social media integration for a retail chain
Further development of the content management system in MS Silverlight
Windows 8 app for an Austrian company
Development on Microsoft Azure

Oct 2009 - Dec 2011

2 years 3 months

Pointsmanagement

Project "eNeg" – design and co-project management of a development team in Egypt in cooperation with TU Wien
Integration of eSource-eNeg using web services
Relaunch of eSource 2.0 (design, PM, development)
Automated web tests with Telerik

Jul 2006 - Sep 2009

3 years 3 months

negPoint

eSourcing solution for auctions and tenders in C#.Net and SQL
Excel integration online/offline
Design and documentation
Deployment and server maintenance (Windows Server with IIS and SQL Server)
Support

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Automotive, and Retail.

Information Technology

Automotive

Retail

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Quality Assurance, Procurement, and Project Management.

Information Technology

Product Development

Quality Assurance

Procurement

Project Management

Skills

Programming

C#.Net, Vb.Net, .Net Core
Blazor, Rabbitmq, Signalr, Ms Orleans, Powershell
Angular, Typescript, Javascript
Html, Css, Bootstrap, Xml, Json
Sql, Sqlite, Entity Framework
Wpf, Wcf, Rest Api, Soap, Swagger
Ioc, Mef, Mvvm
Asp.Net, Ajax, Silverlight

Programs & Tools

Visual Studio, Visual Studio Code, Webstorm
Tfs, Git, Bitbucket, Sourcetree
Agile Software Development (Scrum, Kanban)
Jira, Confluence And Azure Devops
Ms Sql Server And Microsoft Iis
Telerik Controls, Reporting, Automated Testing
Farpoint Excel
Sharpdx (Pcl), Hdf

Driver'S License

Class B

Personal Qualities And Interests

Motivated
Flexible
Team Player
Dedicated
Resilient
Solution-Oriented
Willingness To Learn
.Net Core, Azure, Blazor, Xamarin, Distributed Systems, Multi-Threading/Optimizations, Security, Clean Code
Music
Non-Fiction Books (Psychology, Philosophy, Physics)
Calisthenics
Football

Languages

German

Native

English

Advanced

Education

Oct 2005 - Jun 2020

TU Wien

Bachelor's in Computer Science, Software & Information Engineering · Computer Science · Vienna, Austria

Sep 1999 - Jun 2004

HTBLuVA Wr. Neustadt

High school diploma · EDVO · Wiener Neustadt, Austria

Certifications & licenses

Class B driver's license

Statistics

Experience

Total positions 5

Experience in Information Technology 20 y

Avg length 3 y 11 m

Longest experience 9 y 7 m

Expertise

Main industries Information Technology, Automotive, Retail

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Highest degree Bachelor

Certifications earned 1

Profile

Created

June 2025

Last Update

June 2026

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Frequently asked questions

Have questions? Find more information here.

Karl is based in Horitschon, Austria.

Karl speaks the following languages: German (Native), English (Advanced).

Karl has at least 20 years of experience. During this time, Karl has worked and for 5 different companies. The average length of individual experience is 4 years. Note that Karl may not have shared all experience and actually has more experience.

In recent years, Karl has worked for Freelancer.

Karl is most experienced in industries like Information Technology, Automotive, and Retail.

Karl is most experienced in business areas like Information Technology, Product Development, and Quality Assurance. Karl also has some experience in Procurement and Project Management.

Karl has recently worked in industries like Automotive, Information Technology, and Retail.

Karl has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.

Karl holds a Bachelor in Computer Science from TU Wien.

Karl has 1 certificate: Class B driver's license.

Karl is immediately available for suitable projects.

Daily Rate Distribution

0 2 4 6 8

<€800 €800-1200 €1200-1600 €1600+

The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

1200

900

600

300

Daily rate avg. 1029 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

1200

900

600

300

Median rate 1040 €

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.

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.