Stefan Rantzuch - Developer

Q: Where is Stefan based?

Stefan is based in Limbach-Oberfrohna, Germany .

Q: What languages does Stefan speak?

Stefan speaks the following languages: German (Native), English (Advanced), Russian (Elementary) .

Q: How many years of experience does Stefan have?

Stefan has at least 24 years of experience. During this time, Stefan has worked in at least 1 role and for 1 company . The average length of individual experience is 2 years and 5 months . Note that Stefan may not have shared all experience and actually has more experience.

Q: What is Stefan's latest experience?

Stefan's most recent position is Developer at Meßinger & Rantzuch GbR .

Q: What companies has Stefan worked for in recent years?

In recent years, Stefan has worked for Meßinger & Rantzuch GbR .

Q: Which industries is Stefan most experienced in?

Stefan is most experienced in industries like Information Technology , Healthcare , and Transportation .

Q: Which business areas is Stefan most experienced in?

Stefan is most experienced in business areas like Information Technology , Product Development , and Quality Assurance . Stefan also has some experience in Logistics .

Q: Which industries has Stefan worked in recently?

Stefan has recently worked in industries like Information Technology and Healthcare .

Q: Which business areas has Stefan worked in recently?

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

Recommended expert

Limbach-Oberfrohna, Germany

Experience

Jan 2025 - Present

1 year 3 months

Developer

Meßinger & Rantzuch GbR

Development of a tool for data entry/analysis and transmission
Planning, architecture, implementation, interface development, deployment
App development (Android, iOS, Windows)
Language: C#, .NET MAUI

Dec 2022 - Dec 2024

2 years 1 month

Developer

Meßinger & Rantzuch GbR

Further development of a patient management system
Programming, documentation, communication with clients/support/service providers, certification/tests, interface development, data adjustments
Customization and extension programming, SOAP, REST API
Language: Delphi, Firebird database

Mar 2021 - Jul 2022

1 year 5 months

Developer

Meßinger & Rantzuch GbR

Setup and support of an international B2B portal (based on a custom shop system)
Testing, communication with client/supplier/subcontractor, programming, data adjustments, data provisioning, monitoring, commissioning, administration
Customization and extension programming, REST API, interface coordination
Language: Delphi, Firebird database

Jan 2019 - Dec 2019

1 year

Developer

Meßinger & Rantzuch GbR

App as a warehouse scanner with local data storage and transfer for management
Planning, architecture, implementation
App development (Android)
Client implementation: Angular 2+, Cordova, Ionic 2+; TypeScript, HTML5, CSS; VBScript

Jan 2018 - Dec 2020

3 years

Developer

Meßinger & Rantzuch GbR

Private project (club member management) focused on client-server architecture, combining web app and mobile app; authentication
Planning, architecture, implementation
REST, OpenID Connect / OAuth 2
Server: C# and .NET Core (2.2 & 3); MS SQL Server
Clients: JavaScript/TypeScript + Angular 7/8 + Ionic 4; WPF

Jan 2016 - Dec 2018

3 years

Developer

Meßinger & Rantzuch GbR

Mobile apps with dynamic content for various service providers; content is available offline and can be updated on the server side
Design, architecture, implementation
Client-server architecture, REST, OAuth 2
Server: C#, ASP.NET Web API 2; MS SQL Server
Client: Angular 2+, Ionic 2+, TypeScript/JavaScript, Bootstrap, HTML5, CSS
Publishing apps via Apple iTunes Connect & Google Play Console

Jan 2015 - Dec 2021

7 years

Developer

Meßinger & Rantzuch GbR

Maintenance, adjustments, and customizations of the Büroware/Webware ERP software (requirements gathering, ongoing support, programming)
Consulting, design, implementation, documentation
CRM, inventory management, financial accounting, cost accounting

Jan 2015 - Dec 2016

2 years

Developer

Meßinger & Rantzuch GbR

Extending a DMS with extra tools and add-ins, e.g. a mail proxy to forward emails to the client while using the DMS interface to archive emails; interface for external access to an existing document management system
Architecture, design, implementation, documentation
REST, POP3, SMTP (server and client); HTML; Windows service; client/server modules, SSL, WebKit
Language: Delphi

Jan 2011 - Dec 2012

2 years

Developer

Meßinger & Rantzuch GbR

Framework in the field of business process management – visualization, GUI, internal mapping of the process architecture
Collaboration with the customer's development team
Architecture, design, implementation, documentation
Client-server application with strong modularization and strict separation between user interface and business logic; communication: web services, XML
Language: C#

Jan 2002 - Present

24 years 3 months

Developer

Meßinger & Rantzuch GbR

Extension, further development, and maintenance of various applications as publishing products with a focus on:
Presentation software for employee training (multimedia, surveys, PDF handling)
Web portal for development support
Management of therapy plans
System for automatic software updates
Software for creating teacher assessments
Valuation of buildings and land
Architecture, design, implementation, documentation
Language: Delphi (partly IntraWeb, HTML, XML, Firebird, HTTP, OLE, POP3, SMTP)

Industry Experience

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

Experienced in Information Technology, Healthcare, and Transportation.

Information Technology

Healthcare

Transportation

Business Area Experience

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

Experienced in Information Technology, Product Development, Quality Assurance, and Logistics.

Information Technology

Product Development

Quality Assurance

Logistics

Skills

Software Development (Focus: Development, Architecture, Design, Analysis; Also: Consulting, Testing, Documentation)
Project Management
Network Administration On Windows Server, Windows Clients, Peripheral Integration And Network Infrastructure
Operating Systems: Focus On Ms Windows And Windows Server (All Versions), Secondary Linux
Programming Languages (Focus): C#, Delphi/pascal, Typescript/javascript, Html, Css, Xml, Sql
Programming Languages (Secondary): Vba, Visual Basic, Vb.net, Php
Frameworks: .Net Maui, Xamarin, Angular 2+, Ionic 2+, Cordova
Environments: Ms Visual Studio, Delphi/rad Studio, Visual Studio Code
Devops: Azure Devops, Atlassian Suite, Github
Version Control: Git, Azure Devops / Tfs, Mercurial
Databases: Firebird, Ms Sql Server, Mysql, Access, Bde/dbexpress
Business Solutions: Erp Systems (E.g. Softengine Büroware) – Planning, Configuration, Customizations/industry Solutions
Web Solutions: Content Management Systems (Wordpress, Joomla), Online Shops (Gambio)
Communication: Rest, Tcp/ip, Ssl, Smtp, Pop3, Ftp, Http, Soap
Hardware: Pcs (Configuration, Peripherals), Networks (Servers, Routers, Lan, Wlan, Wan, Vpn)
Industries: It (Hardware, It, Internet, Multimedia)
Industries: Retail (B2b, B2c, Logistics, Foreign Trade)
Industries: Real Estate
Industries: Media/publications
Industries: Business Administration
Industries: Natural And Engineering Sciences
Industries: Healthcare
Industries: Education
Industries: Public Administration

Languages

German

Native

English

Advanced

Russian

Elementary

Education

Diploma in Engineering · Mechanical Engineering

Statistics

Experience

Total positions 10

Experience in Information Technology 24 y

Avg length 4 y 7 m

Longest experience 24 y 2 m

Expertise

Recent roles Developer

Main industries Information Technology, Healthcare, Transportation

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Highest degree Bachelor

Profile

Created

September 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Stefan based?

Stefan is based in Limbach-Oberfrohna, Germany.

What languages does Stefan speak?

Stefan speaks the following languages: German (Native), English (Advanced), Russian (Elementary).

How many years of experience does Stefan have?

Stefan has at least 24 years of experience. During this time, Stefan has worked in at least 1 role and for 1 company. The average length of individual experience is 2 years and 5 months. Note that Stefan may not have shared all experience and actually has more experience.

What roles would Stefan be best suited for?

Based on recent experience, Stefan would be well-suited for roles such as: Developer.

What is Stefan's latest experience?

Stefan's most recent position is Developer at Meßinger & Rantzuch GbR.

What companies has Stefan worked for in recent years?

In recent years, Stefan has worked for Meßinger & Rantzuch GbR.

Which industries is Stefan most experienced in?

Stefan is most experienced in industries like Information Technology, Healthcare, and Transportation.

Which business areas is Stefan most experienced in?

Stefan is most experienced in business areas like Information Technology, Product Development, and Quality Assurance. Stefan also has some experience in Logistics.

Which industries has Stefan worked in recently?

Stefan has recently worked in industries like Information Technology and Healthcare.

Which business areas has Stefan worked in recently?

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

What is Stefan's education?

Stefan holds a Bachelor in Mechanical Engineering.

What is the availability of Stefan?

Stefan is immediately available for suitable projects.

What is the rate of Stefan?

Stefan's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.