Stefan R.-Developer
Check rate
Experience
Developer
Meßinger & Rantzuch GbR
- Development of a tool for data entry, analysis, and transmission
- Conception, architecture, implementation, interface development, deployment
- App development (Android, iOS, Windows)
- Language: C#, .NET MAUI
Developer
Meßinger & Rantzuch GbR
- Further development of a patient management system
- Programming, documentation, communication with customers/support/service providers, certification/testing, interface development, data adjustments
- Customization and enhancement programming, SOAP, REST API
- Language: Delphi, Firebird database
Developer
Meßinger & Rantzuch GbR
- Launch and support of an international B2B portal (based on a custom shop system)
- Testing, communication with clients/suppliers/subcontractors, programming, data adjustments, data provision, monitoring, commissioning, administration
- Customization and enhancement programming, REST API, coordination of interfaces
- Language: Delphi, Firebird database
Developer
Meßinger & Rantzuch GbR
- App used as a warehouse scanner with local data storage and transfer to the administration system
- Conception, architecture, implementation
- App development (Android)
- Client implementation: Angular 2+, Cordova, Ionic 2+; TypeScript, HTML5, CSS; VBScript
Developer
Meßinger & Rantzuch GbR
- Personal project (club member management) focused on client-server architecture, combining a web app and mobile app; authentication
- Conception, architecture, implementation
- REST, OpenID Connect / OAuth 2
- Server: C# & .NET Core (2.2 & 3); MS SQL Server
- Clients: JavaScript/TypeScript + Angular 7/8 + Ionic 4; WPF
Developer
Meßinger & Rantzuch GbR
- Mobile apps with dynamic content for various service providers; content is available offline and can be exchanged server-side
- Planning, architecture, implementation
- Client-server architecture, REST, OAuth 2
- Server: C#, ASP.NET WebApi2; MS SQL Server
- Client: Angular 2+, Ionic 2+, TypeScript/JavaScript, Bootstrap, HTML5, CSS
- Publishing apps through Apple iTunes Connect & Google Play Console
Developer
Meßinger & Rantzuch GbR
- Support, customization, and individualization of the ERP software Büroware/Webware (requirements gathering, support for ongoing operations, programming)
- Consulting, design, implementation, documentation
- CRM, inventory management, financial accounting, cost accounting
Developer
Meßinger & Rantzuch GbR
- Extension of a DMS with additional tools and add-ins, e.g. a mail proxy for forwarding emails to the client while using the DMS interface in parallel 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
Developer
Meßinger & Rantzuch GbR
- Framework for business process management – visualization, GUI, internal representation of the process architecture
- Collaboration with the client's development team
- Architecture, design, implementation, documentation
- Client-server application with extensive modularization and strict separation between user interface and program logic; communication: web services, XML
- Language: C#
Developer
Meßinger & Rantzuch GbR
- Extension, further development, and maintenance of various applications distributed as publishing products, focusing 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 evaluations
- Assessment of buildings and properties
- 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.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Quality Assurance, and Logistics.
Skills
Software Development (Focus Areas: Development, Architecture, Design, Analysis; Additional: Consulting, Testing, Documentation)
Project Management
Network Administration Windows Server, Windows Clients, Connection Of Peripherals And Network Infrastructure
Operating Systems: Focus On Ms Windows And Windows Server (All Versions), Secondary Linux
Programming Languages (Focus Areas): 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) – Conception, Configuration, Adaptations/Customizations/Industry Solutions
Internet Solutions: Content Management Systems (Wordpress, Joomla), Webshops (Gambio)
Communication: Rest, Tcp/Ip, Ssl, Smtp, Pop3, Ftp, Http, Soap
Hardware: Pc (Configuration, Peripherals), Networks (Servers, Routers, Lan, Wlan, Wan, Vpn)
Industries: It (Hardware, Data Processing, Internet, Multimedia)
Industries: Commerce (B2b, B2c, Logistics, Foreign Trade)
Industries: Real Estate
Industries: Media / Publications
Industries: Business Administration
Industries: Natural Sciences And Engineering
Industries: Healthcare
Industries: Education
Industries: Public Administration
Languages
Education
Dipl.-Ing. · Mechanical engineering
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Stefan is based in Limbach-Oberfrohna, Germany.
Stefan speaks the following languages: German (Native), English (Advanced), Russian (Elementary).
Stefan has at least 25 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 3 years and 6 months. Note that Stefan may not have shared all experience and actually has more experience.
Based on recent experience, Stefan would be well-suited for roles such as: Developer.
Stefan's most recent position is Developer at Meßinger & Rantzuch GbR.
In recent years, Stefan has worked for Meßinger & Rantzuch GbR.
Stefan is most experienced in industries like Information Technology, Healthcare, and Transportation.
Stefan is most experienced in business areas like Information Technology, Product Development, and Quality Assurance. Stefan also has some experience in Logistics.
Stefan has recently worked in industries like Information Technology and Healthcare.
Stefan has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.
Stefan holds a Bachelor in Mechanical engineering.
The availability of Stefan needs to be confirmed.
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 15 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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