Daniel Friedrich - Senior Delphi and C# Software Developer

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Kürnbach, Germany

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Experience

Jan 2024 - Present

2 years 10 months

Senior Delphi / C# Developer

Mazda Motors Europe

Maintenance and enhancement of the DMS (Dealer Management System) developed by Mazda, as well as external interfaces to various third-party systems
Management of service orders and provision of central components such as customer and vehicle management
System design and further development/maintenance of the Delphi application using a Firebird database
Creation and maintenance of SOAP/REST-based interfaces
Technologies: Delphi, C#, .Net, SOAP, REST, Firebird, OAuth, Jira, DUnitX, Git

Jun 2023 - Dec 2023

7 months

Senior Delphi Developer

Mazda Motors Deutschland

Extension of the DMS with an external interface connecting to the Ford ecosystem for customer management and repair order management
System design and development of the SOAP web service interface using Delphi and a Firebird database
Technologies: Delphi, SOAP, XML, Firebird, REST, OAuth, Jira, DUnitX, SVN

Apr 2023 - Jun 2023

3 months

Senior C# Developer

Mercedes-Benz AG

System design and specification of a flexible XML transformation interface for the automated provision of translation files from a CMS to a translation agency
Development of a C# command-line application for asynchronous data processing, planned for integration into a REST-based web solution
Technologies: C#, .Net Core, XML, asynchronous data processing, Git, Jira, Confluence

Nov 2022 - Present

4 years

Senior Project Manager

Mercedes-Benz AG

Design of a system for GDPR-compliant use of communication channels and internal analysis of large volumes of data based on VINs and owner information
System design and creation of the detailed specification for microservices and their communication channels to external interfaces
Technologies: Microservices, RabbitMQ, Redis, Java, Spring, REST, XML, JSON, Confluence, Jira, Git

Jan 2021 - Feb 2021

2 months

Senior Fullstack Developer

Gentherm GmbH

Implementation of the logistics platform web application and its REST API
Use of existing multi-tier frameworks and integration with supplier systems
Technologies: C#, ASP.net MVC, MySQL, DeveloperExpress components, RemObjects SDK/DataAbstract, IIS, Visual Studio 2013, Git

Feb 2018 - Mar 2018

2 months

Senior iOS Developer

Deutsche Telekom AG

Development of a framework and a demo app for an AR-based messaging prototype with Location Based Services
Technologies: Xcode, Swift, ARKit, MapKit, SceneKit, Git, iOS Frameworks

Apr 2014 - Nov 2015

1 year 8 months

Senior Fullstack Developer

Gentherm GmbH

Development of a web application for a logistics platform for sea, air, and road transport for use by freight forwarders and suppliers
Development of the REST API as a bridge between the web frontend and the non-REST-compatible core system
Technologies: C#, ASP.net MVC, MySQL, DeveloperExpress components, RemObjects SDK/DataAbstract, IIS, Visual Studio 2013, Git

Aug 2013 - Present

13 years 3 months

Senior Backend Developer / System Design / Maintenance

Deutsche Telekom AG

Continued enhancement and maintenance of the compensation and Partner Lounge system on a part-time basis
Technologies: Oracle 19c, PL/SQL, Java, Spring, AXIS3, SoapUI Pro, JBoss, Apache, Linux, SVN, SOAP, XML, Webservices, Eclipse, MockServices, CSV, ASCII, UTF-8, Shell Scripts

Aug 2013 - Oct 2022

9 years 3 months

Senior iOS Developer

IBM Research & Development GmbH

Further development of an iPad application for vehicle configuration and quote creation for the international market
Preparation of specifications and implementation of specified enhancements
Optimization of processes within the application
Technologies: Xcode, Swift, SwiftUI, Objective-C, CoreData, SQLite, Combine, Swift Concurrency (async/await), Unit-Testing, Git, GCD, Quartz Framework, Core Animation, REST, XML, JSON

Jul 2012 - Jun 2013

1 year

Senior Mobile Developer / System Tester

Deutsche Telekom AG

System design and development in the SCRUM project to extend the customer center with a mobile app (iOS/Android)
Development of software components as part of agile development
Technologies: Java, Spring, Hibernate, CXF, JSF, Apache Cordova (PhoneGap), Maven, Selenium, JBoss, Linux, SVN, SOAP, REST, XML, Webservices, Eclipse, Xcode, MockServices, Oracle

Nov 2011 - Jun 2012

8 months

SCRUM-Master / Senior Backend Developer

Deutsche Telekom AG

Introduction of SCRUM in the development team and coaching of the team and Product Owners
Functional and technical support for the redevelopment of the Partner Lounge using current web technologies
Technologies: Java, JPA, Spring, JSF, RichFaces, jQuery, JBoss7, Oracle, PL/SQL, SoapUI Pro, SVN, SOAP, XML, Webservices, Eclipse, MockServices

Jun 2011 - Oct 2011

5 months

Fullstack Developer / Maintenance / System Testing

Deutsche Telekom AG

Further development, maintenance, and execution of automated frontend and backend system tests for the Customer Center
Technologies: Java, Spring, Hibernate, AXIS3, JAXB, SoapUI Pro, JBoss, JBossWS, Apache, Linux, SVN, Maven, SOAP, XML, Webservices, Eclipse, MockServices

Apr 2011 - May 2011

2 months

iOS / Backend System Tester

Deutsche Telekom AG

System testing of a mobile application in the simulator and on the device, including documentation of the test cases
System testing of the SOAP/REST-based backend for managing the user data for the mobile application
Technologies: iOS, iPhone, Java, SoapUI Pro, JBoss, Apache, Linux, SVN, SOAP, XML, Webservices

Jan 2010 - Jul 2013

3 years 7 months

Senior Backend Developer / System Design / Maintenance

Deutsche Telekom AG

Solution design using UML diagrams and detailed system design for contract and reporting functionalities of the content supplier compensation system and Partner Lounge web frontend
Maintenance and further development of PL/SQL code, SQL queries, and data structures
Technologies: Oracle 19c, PL/SQL, Java, Spring, AXIS3, SoapUI Pro, JBoss, Apache, Linux, SVN, SOAP, XML, Webservices, Eclipse, MockServices, CSV, ASCII, UTF-8, Shell Scripts

May 2009 - Dec 2009

8 months

SOAP Webservices System Tester

Deutsche Telekom AG

Creation of a test concept for system and regression testing of the central customer management and contract system for T-Online portals
Creation of test templates and compilation of all test suites for developer testing and regression testing
System administration of approx. 1,2 Mio. customer records and approx. 15.000 transactions/day
Technologies: SoapUI Pro, Groovy, PL/SQL, JBoss, Apache, Linux, SVN, SOAP, XML, Webservices, Java, Eclipse, Spring, Hibernate, MockServices

Mar 2008 - May 2009

1 year 3 months

Senior Developer

Kassenärztliche Vereinigung Bayerns

Development of a program to control VDX data processing with the KBV and manage invoice data transfer to SAP
Creation of shell scripts for parameter-driven Java applications on UNIX
Technologies: PL/SQL, Delphi 7, Oracle 10g, XML, Report-Builder, XSLT, XSL, Java, UNIX, SVN

Feb 2008 - Dec 2008

11 months

Senior Developer

RMS GmbH

Further development and maintenance of the call center dispatching and billing solution
Integration and support of the existing multi-tier architecture with MySQL and Oracle
Technologies: Delphi 7, MySQL, Oracle 9i, RemObjects SDK, Data Abstract, SOAP, XML, Webservices, ASP.Net, C#

Nov 2007 - Nov 2007

1 month

Lecturer

Dräxlmeier GmbH

Preparation and delivery of training on the DOA Oracle access component with Delphi
Teaching the efficient use of DOA components and optimization options in the Oracle database
Technologies: Oracle 9i/10g/11g, Delphi 7, DOA, PL/SQL

Sep 2007 - Present

19 years 2 months

Senior Developer / Project Manager / System Design

MAN Nutzfahrzeuge AG

Implementation of a web-based freight cost information system for internal make-or-buy decisions
Development of a web-based transport damage database with image upload and printing functions for transport insurance
User training
Frontend in ASP.Net with C#, application server and reporting client in Delphi with RemObjects/DataAbstract, DevExpress components, Oracle 21c
Technologies: Delphi XE7, DevExpress, RemObjects, DataAbstract, C#, ASP.Net, Oracle 21c, PL/SQL, Multi-Tier, SOAP-Webservices, Git

Jun 2005 - Aug 2007

2 years 3 months

Senior Developer

Kassenärztliche Vereinigung Bayerns

Enhancement of the billing and information system: creation of report DLLs for list re-billing and extension of programs with new functionality
Performance optimization of long-running transactions and queries
Creation of procedures, functions and packages in PL/SQL for aggregation tables and server-side bulk data processing (approx. 200 million records/quarter)
Technologies: PL/SQL, Delphi 7, Oracle 10g, XML, Report-Builder, XSLT, XSL, Java, UNIX, SVN

Feb 2005 - Jun 2005

5 months

Senior Developer

RMS GmbH

Design and development of software for call center dispatching and billing of demand-responsive shared taxi services
Integration of web services for geocoding and route planning, as well as a fax solution for transmitting routes to taxi companies
Billing of routes to transport companies and creation of statistics and reports
Multi-tier application server with MySQL/Oracle support, web interface for smart clients
Technologies: Delphi 7, MySQL, Oracle 9i, RemObjects SDK, Data Abstract, SOAP, XML, Webservices, ASP.Net, C#

Industry experience

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

Experienced in Automotive, Manufacturing, Telecommunication, Information Technology, Healthcare, and Transportation.

Automotive

Manufacturing

Telecommunication

Information Technology

Healthcare

Transportation

Business area experience

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

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

Information Technology

Project Management

Product Development

Quality Assurance

Customer Service

Summary

I have been involved in professional software development since 1989. My main areas of expertise are the design and development of native iOS applications with Swift and SwiftUI, as well as the development of database-based, graphical applications with C# / Delphi / Java using client/server, web and multi-tier technologies based on SOAP and REST web services. The design and implementation of the corresponding SOAP/REST web services are also part of my portfolio, as is the development and optimization of database procedures in SQL and PL/SQL for high-performance, server-side processing of large volumes of data. In most projects, I was part of an agile SCRUM team.

Skills

Programming Languages

Swift Since Its Release (2014)
Swiftui Since Its Release (2019)
Objective-C 11 Years
Pl/Sql > 15 Years
Java 5 Years
C# 7 Years
Delphi / Pascal > 15 Years
Html/Css 4 Years

Databases

Oracle (7.X - 21c) > 15 Years
Mysql > 10 Years
Postgresql > 5 Years
Ms Sql Server 3 Years

Technologies

Rest, Soap
Xml, Json
Spring, Hibernate
Jpa, Sql

Other

Git, Bitbucket
Jira, Confluence
Xcode, Intellij
Tomcat, Maven

Languages

German

Native

English

Intermediate

Certifications & licenses

Certified SCRUM Developer

Mechanical Engineering Technician Master Craftsman

Business Information Specialist (IHK)

IHK

Statistics

Experience

Total positions 21

Experience in Automotive 19 y

Avg length 2 y 11 m

Longest experience 19 y 1 m

Expertise

Recent roles Senior Delphi / C# Developer, Senior Delphi Developer, Senior C# Developer

Main industries Automotive, Manufacturing, Telecommunication

Main business areas Information Technology, Project Management, Product Development

Qualifications

Certifications earned 4

Profile

Member since

September 2025

Last update

October 2026

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Frequently asked questions

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Daniel is based in Kürnbach, Germany and can operate in on-site, hybrid, and remote work models.

Daniel speaks the following languages: German (Native), English (Intermediate).

Daniel has at least 22 years of experience. During this time, Daniel has worked in at least 15 different roles and for 10 different companies. The average length of individual experience is 1 year. Note that Daniel may not have shared all experience and actually has more experience.

Based on recent experience, Daniel would be well-suited for roles such as: Senior Delphi / C# Developer, Senior Delphi Developer, Senior C# Developer.

Daniel's most recent position is Senior Delphi / C# Developer at Mazda Motors Europe.

In recent years, Daniel has worked for Mazda Motors Europe, Mazda Motors Deutschland, Mercedes-Benz AG, Deutsche Telekom AG, and IBM Research & Development GmbH.

Daniel is most experienced in industries like Automotive, Manufacturing, and Telecommunication. Daniel also has some experience in Information Technology, Healthcare, and Government and Administration.

Daniel is most experienced in business areas like Information Technology, Project Management, and Product Development. Daniel also has some experience in Quality Assurance, Customer Service, and Logistics.

Daniel has recently worked in industries like Automotive, Manufacturing, and Telecommunication.

Daniel has recently worked in business areas like Information Technology, Project Management, and Product Development.

Daniel has 4 certificates. Among them, these include: Certified SCRUM Developer, Certified SCRUM Master, and Mechanical Engineering Technician Master Craftsman.

The availability of Daniel needs to be confirmed.

Daily rate distribution

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<€960 €960-1120 €1120-1280 €1760+

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Average rates for similar positions

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Daily rate avg. 955 €

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

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Median rate 940 €

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 17 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.