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Delphi Experts in Dusseldorf

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Hire experts who build and maintain Delphi applications, modernize Object Pascal code, and connect VCL or FireMonkey systems to databases and APIs. Get fast, precise matching with vetted, available freelancers.

Meet FRATCH Experts in Dusseldorf, who have recently used Delphi

Verified expert

Daniel Pohl

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Freelancer in industrial automation engineering

Wuppertal
Daniel Pohl

Last position:

Freelancer in industrial automation engineering at dPSolutions

  • Independent work as a PLC and software specialist focusing on automation and custom machinery
  • Programming, modernization, expansion and optimization of production plants with focus on efficiency improvements, data transparency and system integration
  • PLC programming and safety with Siemens S7 Classic/TIA-Portal, Beckhoff TwinCAT 2/3 and CoDeSys
  • Development of high-level language software and database applications (.NET / C#, C++, Visual Basic .NET, Borland/Embarcadero C++)
  • Development of custom software solutions for industrial automation, including embedded systems (Raspberry Pi, Arduino, NodeMCU, ESP8266)
  • System integration of external systems such as readers, printers, scales, scanners and cameras, as well as various fieldbus systems (Ethernet, Profinet, Profibus, EtherCAT, CAN bus, RS232, TCP/IP)
  • Creation of visualizations and HMI applications with Siemens WinCC flexible, Beckhoff HMI and .NET front-ends
  • Design, development and integration of machine vision solutions (Keyence, Cognex, AVS Alfavision, camera systems) in PLC and PC environments
  • Design and implementation of process data acquisition systems and traceability solutions (100% traceability) based on Microsoft SQL Server (Compact, Express, Server) including stored procedures and direct PLC-SQL communication
  • Creation of software and PLC concepts, standard function blocks and project libraries for PLC and high-level language projects
  • Design and programming of conveyor, testing, assembly, packaging and grinding systems in industries such as automotive, chemical, food, electronics and machinery and plant engineering
  • Conducting workshops and training on Siemens TIA-Portal, STEP7 Classic, Beckhoff TwinCAT (including TwinSAFE) as well as topics like architectures, safety, database integration and documentation
  • Creation of technical documentation, manuals, training materials and class documentation with Microsoft Office and Doxygen
  • Project management tasks from requirement analysis through planning, concept development and supplier coordination to commissioning, production support and maintenance
Verified expert

Esmail Saberi

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Senior Load and Performance Tester

Düsseldorf
Esmail Saberi

Last position:

Senior Load and Performance Tester at Deutsche Bahn (DB-Netz)

  • Design, development, and execution of load and performance tests for the PRISMA project
  • Use of Apache Jmeter, Gatling, Apache ActiveMQ, Jms/Tibco Ems, SikuliX, Jython, Amazon AWS, PAN-Client
  • Methods: load tests, test automation
Verified expert

Nils Schneider

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Backend system and web client for exchanging electricity meters for utility providers

Heiligenhaus
Nils Schneider

Last position:

Backend system and web client for exchanging electricity meters for utility providers at Freelance

  • Design and implementation of a system to control the entire process for new, removal, and exchange operations of electricity meters by external service providers for a utility company

  • Automated retrieval of orders and available devices via defined interfaces (e.g. from SAP)

  • Orchestration of process steps (assigning meters, processing meter data, sending updated information back to the source system) using a Spring Boot backend

  • Provision of a React-based web client for operational tracking and control of orders, e.g. to continue failed process steps or resend notifications

Verified expert

Bernhard Döpper

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Senior Architect, Project Manager and Coach

Hilden
Bernhard Döpper

Last position:

Enterprise Architect. And responsible for the cross-functional architecture as well as all domains with a focus on the sales at Süddeutsche Krankenversicherung

  • Creation of business and technical concepts as well as support for enterprise architecture management as part of the migration to the Adesso standard insurance solutions and the renewal of surrounding systems

  • Interface definitions

  • Business analysis and creation of the business concepts for input management and sales

  • Creation of architecture guidelines and processes

  • Processing technical and business decisions in the architecture board

  • Definition of service processes and system management aspects

  • Creation of the technical target operating model

  • Creation of an integration architecture for AI/LLMs from the providers Commasoft and Insiders

  • CommaSoft (Alan) webpages and web services

  • Insiders for Smartfix based on web services

  • Creation of a question catalog for a security/regulatory check.

  • Analysis of threats using threat modeling / STRIDE incl. creation of a set of measures to secure the systems

System environment: Jira, Confluence, Java, Enterprise Architect, VAIT/DORA, KritisV, GDPR, IT ServiceMgmt, Adesso Ecosphere and Insure Health, DoPIX and successor product, SmartFix, SmartFlow, Zabas, Kolumbus, Clarc archive, BiPRO, AI / LLM, MS Azure, AWS, TOM/FMO

Discover over 15,000 top freelancers

Statistics of experts using Delphi

Aggregated from the professional profiles of matched freelancers.

Experience

26 years

Position duration

2 years

Positions per freelancer

16

Top business areas

Information Technology, Operations, Product Development

Top industries

Automotive, Information Technology, Manufacturing

Certification focus areas

Information Technology, Project Management, Operations

Bachelor's degree or higher

80%

Master's degree or higher

40%

Certifications per freelancer

1

Most common languages

German, English, Bosnian

Speak two or more languages

83%

Based on our profile pool as of 30 Aug 2026.

Daily rate distribution

0 1 2 3 4
<€800 €800-​1200 €1200+

The chart shows how the daily rates of freelancers in this technology in Dusseldorf are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.

Average rates of experts in Dusseldorf using Delphi

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

800
600
400
200
Rate comparison chart
Daily rate avg. 799 €

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

800
600
400
200
Rate comparison chart
Median rate 780 €

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

About the technology

Delphi Development

Delphi is used to build native Windows software, database-heavy business tools, and cross-platform desktop applications. It is based on Object Pascal and is still valued for fast UI work, strong performance, and long-lived enterprise codebases. Delphi is also known as Embarcadero Delphi, and many teams still refer to older systems as Borland Delphi.

Common Work

  • Maintain and extend VCL applications
  • Build FireMonkey desktop clients
  • Connect apps to SQL databases and REST APIs
  • Refactor legacy Object Pascal code
  • Package and deploy stable releases

Ecosystem

Strong professionals working with Delphi understand VCL, FireMonkey, DataSnap, Indy, and common database layers. They know how to work with source control, build tools, and mixed environments that include C++ or .NET services. Good expertise also covers debugging old code without breaking the parts that still run the business.

When To Bring In Help

Companies usually bring in freelance expertise when a Delphi system is stable but hard to change, or when internal knowledge has faded. This is common in finance, logistics, manufacturing, and other sectors with long-running Windows software. In Dusseldorf, that often means teams want help close to the office for workshops, while day-to-day delivery can still happen remotely.

What Good Specialists Do

  • Read and improve large codebases quickly
  • Preserve behavior while modernizing safely
  • Handle UI, database, and service layers together
  • Document changes clearly for future support
  • Spot technical debt before it becomes risk

Quality Signals

Good Delphi professionals write clear Object Pascal, keep forms and logic tidy, and test changes against real workflows. They ask about deployment, component dependencies, and database access early. If you need support with a legacy product or a new Delphi module, look for someone who can explain tradeoffs in plain words and keep releases predictable.

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Frequently asked questions

Questions about Delphi? Start with the answers below.

Delphi is mainly used for native Windows applications, internal business tools, and database-driven desktop software. It also appears in cross-platform client work through FireMonkey, especially when teams need a stable user interface and direct access to local data.

Delphi is the best-known implementation and ecosystem around Object Pascal, but the terms are not identical. In practice, teams often use them together when they talk about code, libraries, and older systems built with Borland Delphi or Embarcadero Delphi.

Delphi is often chosen for existing Windows codebases, fast desktop UI work, and direct support for older business logic. C# and Java are more common for many new server-first systems, but Delphi can be the better fit when a mature application must stay stable while still evolving.

A strong Delphi specialist usually understands SQL, REST APIs, Windows deployment, and debugging tools. Experience with VCL, FireMonkey, and database components matters too, because many projects mix user interface work with data access and legacy integrations.

Delphi work often needs someone who has seen real legacy code, not just a tutorial project. Small fixes may be simple, but larger modernization efforts need a specialist who can read old patterns, protect existing behavior, and plan safe changes.

Yes, Delphi work is often well suited to remote delivery because much of it is code, testing, and database integration. In Dusseldorf, on-site time can still help for kickoff meetings, access to internal systems, or workshops around older applications that are hard to document.

Look for someone who can explain Delphi tradeoffs clearly, show experience with VCL or FireMonkey, and describe how they handle testing and deployment. Strong answers about legacy cleanup, database access, and release safety are usually more useful than broad claims.

Delphi still powers important systems that are expensive to replace, especially in companies with long-lived desktop software. Teams hire specialists to keep those applications secure, compatible, and maintainable while the business continues to depend on them.

The average hourly rate of freelancers in Dusseldorf, Germany who have used Delphi in their recent projects is 100 €, which corresponds to a daily rate of about 799 € based on an 8-hour working day.

Of the freelancers in Dusseldorf, Germany who have used Delphi in their recent projects, 80% hold at least a Bachelor's degree and 40% hold at least a Master's degree.

On average, freelancers in Dusseldorf, Germany who have used Delphi in their recent projects have 26 years of professional experience, with a single engagement typically lasting around 2 years.

The most common languages among freelancers in Dusseldorf, Germany who have used Delphi in their recent projects are German (100%), English (83%), and Bosnian (17%).

The most common industries among freelancers in Dusseldorf, Germany who have used Delphi in their recent projects are Automotive (83%), Information Technology (83%), and Manufacturing (83%).

The most common business areas among freelancers in Dusseldorf, Germany who have used Delphi in their recent projects are Information Technology (100%), Operations (83%), and Product Development (83%).

Main locations of FRATCH Experts, who have recently used Delphi

Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.

Countries:

Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg

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