Jörg Trappschuh - Database Expert and Software Architect

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Lampertheim, Germany

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Experience

Jun 2026 - Oct 2026

5 months

Consultant, Requirements Engineer and Database Expert

Project – Evaluation and development of databases for a new product line for a measuring equipment manufacturer

Current-state analysis
Requirements analysis of the data storage layer
Writing benchmark tests
Design of the new database schema
Database migrations
Development of audit logging and Part11
Creation of backup and recovery concepts
Design of the persistence layer API
Writing unit tests
Creating requirements in Azure

Tools: C#, Visual Studio 2022, Azure DevOps, SonarQube, Git, RestSharp, WebServer, PostgreSQL, MS SQL, SQLite, MinIO, Podman, Docker, DataGrip, SQL Management Studio, HeidiDB, pgAdmin

Aug 2025 - Dec 2025

5 months

Database Expert and Software Developer

Project – Digitalization of workflows for a medical device manufacturer

Documenting the current situation
Concept for centralizing user requests
Creating the relationship diagrams for the databases
Creating the data flow diagram
Developing a target system to support the processes
Ensuring parallel operation through data exchange using ETL processes and replication
Optimizing database access
Supporting and preparing release changes
Creating requirements in Azure

Tools: C#, Visual Studio 2022, Git, MS SQL 2022, TSQL, Postgres, DataGrip, Azure DevOps Server, SQL Server Profiler, SQL Management Studio, Babtec, Ordat, NiceLabel, AP+

Dec 2024 - Oct 2026

1 year 11 months

Database Expert and Software Developer

Public sector

There is neither documentation nor developer support available for a legacy software system. The data needs to be prepared for a new system, while a long transition phase must be ensured.
Creating the relationship diagram of the database
Providing database projects in Visual Studio
Developing a service for exchanging files
Preparing the structures for new requirements
Revising the old building authority program in Delphi
Securing documents in the DMS
Ensuring parallel operation through data exchange using ETL processes
Creating dynamic SQL in C#
C#, Visual Studio 2022, Git, Delphi, MS SQL 2022, TSQL, DataGrip, SQL Management Studio

Oct 2024 - Apr 2026

1 year 7 months

Hybrid

Software Architect, Software Developer and Database Developer

Healthcare

The goal is to automate billing for hospitals. Rules from the EBM catalog are prepared so that they can be used for automated billing with data records from the KIS (hospital information system). Users should be able to set and adjust the rules themselves.
Developing the architecture
Creating the rules engine
Importing and exporting data with Excel
Connecting the data with Dedalus
Developing the interface as a prototype
Integrating different sources using ETL processes
Creating stored procedures and dynamic SQL
Creating web services for providing data
Blazor interface
Testing with Visual Studio and NUnit
C#, Visual Studio 2022, NUnit, Git, Excel, MariaDB, DataGrip, Docker, PowerShell, Windows, HeidiDB

Jun 2024 - Oct 2024

5 months

Software Developer and Database Developer

Logistics

Extending the application for recording promotional items – throughout Europe
Extending the interface for new modules
Extending the database
Coordination with stakeholders and self-organized work
C#, .NET Core, WPF, MVC, Visual Studio 2022, Git, Azure DevOps, MS SQL 2022, TSQL, Entity Framework, SQL Management Studio

Feb 2024 - Jul 2024

6 months

Software Developer and Database Developer

Industry

Distributing machine parameter data and firmware across Europe via a web interface
Gathering requirements from stakeholders
Analyzing the initial situation and current state and creating a concept
Creating the selection interface
Replicating the data to the local databases
Optimizing performance and normalizing database tables
Creating stored procedures and dynamic SQL
Creating epics, user stories, and tests in Git
.NET Core, WPF, Visual Studio 2022, Git, MS SQL, TSQL, SQL Server Profiler, SQL Management Studio, RabbitMQ, Windows 10, Azure DevOps Server

Jan 2024 - Sep 2024

9 months

Heidelberg, Germany

Lecturer for Databases and Software Engineering

SRH private university

at SRH private university in Heidelberg – 1 day a week

Introduction to databases, SQL, normalization, procedures and functions in databases, conducting customer meetings, process models, change management, communication problems

Tools: MariaDB, HeidiDB

Sep 2023 - Jan 2024

5 months

Software Developer

Mechanical Engineering

Converting legacy systems in the field of medical technology
Adjusting the HMI resolution
Integrating new hardware components
Creating a service to monitor the database server
TCPIP communication between the HMI and the service
Unit tests with Visual Studio standard tools
vb.net, C#, WinForm 3.5 & 5, Visual Studio 2005, 2008, 2012, SVN, VisiWin 6.5, VM-Ware with Windows XP, Win7, Win10, MS SQL Express

Aug 2022 - Sep 2023

1 year 2 months

Product Owner

MeQuEn GmbH

Software solution for accrediting meeting participants and voting software for various end customers
Requirements analysis and developing a target vision together with the customer
Creating use cases
Interface between stakeholders and development
Product ballotly.de
Considering cryptographic procedures, including those according to BSI Standard TR 02102-1 and Common Criteria (CC)
Supporting the definition of interfaces and documentation using Swagger/OpenAPI for an API-first approach
Testing and commissioning the solution in the cloud
Swagger, MariaDB, Redis, GitHub, Kubernetes, Docker

Oct 2021 - Mar 2022

6 months

Database Expert

BELECTRIC

Introducing a cluster database solution based on MariaDB
Analyzing requirements
Creating and implementing installation scripts
Testing and commissioning the solution
Documenting the solution
Administering the solution directly after its introduction
MariaDB, MaxScale, Git, Docker, Windows, HeidiDB

Mar 2021 - Dec 2023

2 years 10 months

Requirements Engineer, Software Architect, Software Developer and Database Expert

Phoenix-Contact

New development of a project management system in the energy sector for planning and managing power plants and large-scale projects. Replacing an object-oriented database.
Requirements analysis, developing a target vision together with the customer
Developing the architecture together with stakeholders
Developing the data access layer with Web APIs
Creating WPF interfaces
Providing custom interfaces for the end customer
Creating a digital twin
Simulating 10,000 devices for mass data processing
Developing tools for hardware simulation
Planning and creating tests with Visual Studio tools
Technical documentation, internal support, Scrum
Creating requirements in Polarion
C# 4.8.2, VB.NET, WPF, Visual Studio 2019, .NET, WebServer, REST, Blazor, JSON, GitHub, Polarion, Windows 10, Linux, MariaDB, PostgreSQL, Docker, PowerShell, Clean Code, hawkBit, CI/CD-Pipelines

Feb 2021 - Feb 2022

1 year 1 month

Software Developer and Database Developer

KSB – Frankenthal

Controlling a nameplate stamping machine using SAP data and simulating the system
Preparing customer requirements and monitoring compliance
Analyzing data for plausibility
Creating a digital twin for hardware simulation
Displaying a preview of the nameplates
Testing with Visual Studio tools
Transferring data to the stamping machine
C# 4.7.2, WinForms, Visual Studio 2019, Git, MS SQL Express, Windows 10, SQL Management Studio

Oct 2020 - Feb 2021

5 months

Software Developer

Mode

Supporting a data migration from Navision to SAP. Creating data exporters.
Processing tickets from Jira
C# 4.7.2, Angular, Blazor, Console, Visual Studio 2019, Git, Jira, Confluence, MS SQL 2016, TSQL, SSRS, Windows 10, SQL Management Studio

Sep 2020 - Jan 2021

5 months

iIoT Consultant, Software Architect, Database Developer

SPAIIS

Supporting a software manufacturer with a research project. Machine data is interpreted by AI and stored in a database.
Developing the software architecture for mass data processing
Designing the database
Creating concepts and implementing machine data integration via REST interfaces
Planning and developing tests with Visual Studio, unit testing
Creating a system simulation
C# 4.7.2, RestSharp, WinForms, ReSharper, Visual Studio 2017, JAVA, Linux, MQTT, APIs, REST, Swagger, JSON, HubSpot, Git, SourceTree, MariaDB, PostgreSQL, Windows 10, Docker, Kubernetes

Aug 2019 - Feb 2021

1 year 7 months

Cologne, Germany

Software Developer and Consultant

City of Cologne

The goal is to develop a system that allows decision-makers to define system administration requirements without an administrator having to intervene.
Developing a solution with all stakeholders
Preparing internal stakeholder requirements and monitoring compliance
Creating concepts and implementing migration SQL scripts
Providing database projects in Visual Studio
Creating a console application for processing mass applications
Creating an Excel form for generating CSV files
Planning and developing tests with Visual Studio
Technical documentation, coordination with stakeholders, self-organized work
C# 4.7.2, VB.NET, WinForms, ReSharper, Visual Studio 2017, XML, Git, SourceTree, MS SQL 2016, MS SQL 2010, TSQL, SSIS, PostgreSQL, Excel 2016, VBA, VB6, PowerShell, Windows 10, EcoNet, SQL Management Studio, CI/CD-Pipelines

May 2019 - Jul 2020

1 year 3 months

Germany

Data Analyst

Frankfurt Public Prosecutor's Office

Support in the area of healthcare billing fraud
Investigating datasets according to specifications
Preparing an investigation report
Optimizing Excel templates
Providing online files from the Associations of Statutory Health Insurance Physicians
Importing billing data from the Associations of Statutory Health Insurance Physicians
Data migration from Oracle to MS SQL
Jira, Confluence, Oracle 12, Excel 2016, VBA, Windows 10, SQL Management Studio, Toad for Oracle

May 2019 - Jun 2019

2 months

Karlsruhe, Germany

Software Developer

CAS

Extending a WPF component for displaying and editing any input files
Component development with WPF
Writing black-box tests with Visual Studio 2017
C# 4.7.2, WPF, Visual Studio 2017, Git, SourceTree, Windows 10

Mar 2019 - Mar 2020

1 year 1 month

Germany

Consultant, Software Architect and Development Engineer

Wöhr

Creating a concept for connecting globally distributed systems in the IIoT area
Creating the software concept, including security concepts with microservices
Coordinating the project participants
Building client prototypes in WPF
Analyzing legacy data
Writing a service to import legacy messages into the new system
Testing with Visual Studio and NUnit
C# 4.7.2, WinForms, Blazor, ReSharper, Visual Studio 2017, Git, SourceTree, MS SQL 2016, MariaDB, SQL Management Studio, HeidiDB, REST, Swagger, Docker, Windows 10, Siemens, Beckhoff, EVON-Router

Jun 2018 - Mar 2019

10 months

Stuttgart, Germany

Software Architect and Development Engineer

BOSCH

Developing additional modules for assembly software operated at 50 locations worldwide. The software is part of a shop floor system in the MES environment.
Software error analysis
Further developing an administration tool and the electronic shift log
Connecting to REST interfaces
Component development in WinForms and distribution via NuGet Packages
Unit testing of REST interfaces
Extending web interfaces with .NET Core
Working with ClearCase
C# 4.7.2, WinForms, WCF, RestSharp, .NET Core 2.0, Visual Studio 2017, IIS, TFS 2017, Git, SourceTree, CI/CD-Pipelines, MS SQL 2016, Oracle 12.0, Redis, REST, Erwin Data Modeler, Swagger, Windows 10, SQL Server Management Studio (SSMS)

Feb 2018 - May 2018

4 months

Bonn, Germany

Software Developer and Database Developer

brown IPOSS

Data analysis of geodata in the mobile sector
Adapting ASN1 converters to the end customers' system landscapes
Data analysis for the swapping of base station sectors
Analysis of SwissQual data
C#, Visual Studio 2017, MS SQL 2016, Windows 10, SQL Management Studio

Dec 2017 - Mar 2018

4 months

Stuttgart, Germany

Software Expert, Coach

GVS

Support with the rollout of software for gas and electricity contracts
Vulnerability analysis
Introduction of SignalR
Extending web interfaces with .NET Core
Testing with Visual Studio and NUnit
WPF, VB.NET, .NET 4.5, .NET Core 2.0, ASP.NET, SignalR, JavaScript, Visual Studio 2017, IIS, Oracle 12.1, Oracle SQL Developer 3.1, Windows 10

Nov 2016 - Nov 2017

1 year 1 month

Vlotho, Germany

Database, Backend, MES Expert

Kannegiesser

Standardization of production databases and system interfaces in the MES environment
Database analysis and support for project management
Creating and implementing database concepts, including replication
Setting up ETL processes
Testing the concepts during commissioning
Designing interfaces for master data
Software development of services in C#
Adapting machine-related software in VB6
Creating a digital twin for hardware simulation
Creating stored procedures and dynamic SQL
MS SQL 2012, Visual Studio 2015, C# .NET 4.5, VB6, VBA, Angular, Git, Redmine, SourceTree, Windows, SQL Management Studio

Jun 2016 - Sep 2016

4 months

Augsburg, Germany

Database and MES Expert

Osram

Database analysis in the MES environment to reduce downtime
Writing a monitoring tool for shop floor monitoring
Creating and implementing database and communication concepts
Software development in C#
Designing and carrying out automated and manual tests
MS SQL 2008 R2 Replication and setting up ETL processes
C#, MVC, VB6, Visual Studio 2010, MS SQL 2008 R2, TFS 15, Tortoise SVN, XML, SQL Management Studio, Erwin Data Modeler

Oct 2015 - Apr 2016

7 months

Göppingen, Germany

Software Architect

Siemens

Extending the help system for a major customer
Creating a fallback system for opening the help system
Introducing multilingual support for views with WPF
Migrating the export and import conventions for a new release with MS SQL 2012
Designing an ergonomic maintenance software solution for maintaining help entry points
Coordinating the people involved
Developing automated and manual tests
Creating the SQL scripts for the migration
C# 4.5, Visual Studio 2012, WPF, MVC, WinForms, Infragistics, TFS 15, MS-SQL 2012, PostgreSQL, XQuery, PowerShell, working according to Scrum

Nov 2014 - Dec 2015

1 year 2 months

Software Architect and Development Engineer

BorgWarner Turbo Systems

Developing a rights management system for 12 locations worldwide and more than 1000 assembly stations
Developing the workflow for an ergonomic interface
Planning the architecture and delivery of the rights management system
Developing a validation concept for transferring legacy data
Introducing documentation with DocToHelp
Introducing a ticketing system with OTRS
Testing with Visual Studio
VB.NET, VBA, ASP.NET, MS-SQL 2012, DocToHelp, Visual Studio 2010, TFS

Feb 2014 - Oct 2014

9 months

Steinen, Germany

Software Architect

Innojet

Restructuring and visualization of systems for the pharmaceutical and food industries
Replacing VisiWin components with C# components
Visualizing the actions in the system
Planning the architecture and adapting the software
Commissioning at end customers
C# 4.0, OPC Server INAT for S7, MS-SQL 2005, MS Excel 2010, Visual Studio 2010, VisiWinNet 6.5

Nov 2013 - Dec 2013

2 months

SQL Database Developer

Insurance

Data migration from MS SQL 2005 to MS SQL 2008 for 300 million data records
Optimizing processing speed
MS SQL 2005, MS SQL 2008 R2, MS SQL Management Studio

Jun 2013 - Nov 2013

6 months

Software Developer / Subproject Manager

Airbus

Migration of administrative software for cabin equipment design plans
Planning and carrying out the workflow
Writing specifications and architecture
Database migration from FireBird to MS SQL 2008
Integration with Active Directory and access rights management
SAP R3 – RFC integration
Delphi 5, Delphi XE2, FireBird, MS SQL 2008, DOORS, working according to Scrum

Mar 2013 - May 2013

3 months

Software Developer

Automation Industry

Planning and implementing an editorial system for the engineering area
Planning and implementing software tools to support GMP5
Supporting the development of the internal class library
C#, VS 2008, Windows 7, XML, OPC / S7, MS SQL 2005

Oct 2009 - Dec 2012

3 years 3 months

Frankenthal, Germany

Software Developer

Rosebrock Software

Implementing the central basic packages for tax consulting software
Planning the new architecture with ModelMaker
Performance optimization for calculation modules and SQL queries
Carrying out automated tests under Delphi
Supporting the non-tax-related software components
Interface support and second-level support
Coaching new employees and support staff
Delphi XE, C# .NET 3.5, ADS, ModelMaker 11, Subversion, Windows 7, Vista, XP, XML / XSL

Dec 2007 - Sep 2009

1 year 10 months

Dossenheim, Germany

Software Developer / IT Project Management

Symestic GmbH

Project work in the field of industrial control systems and MES
Project management and IT support for wood processing plants and automotive suppliers
Planning and development of Windows services for controlling industrial systems
New development and standardization of services for data exchange between PLC and database via OPC
Set-up of a plant for JIT / JIS production, including database development
Coaching employees for the DataBridge product
VS 2005 .NET 2.0, C#, VB.NET, MS-SQL 2005, OPC, TFS, SharePoint 2005, IIS, Profinet, Ethernet/IP, S7

Jan 2006 - Nov 2007

1 year 11 months

Worms, Germany

Project Engineer / Project Management

VSK Technik Kübler GmbH

Project management in the industrial sector for software product planning and development
Control of industrial systems with image processing and sensor integration
Task-related sensor evaluation, remote maintenance and data collection
Renewal of the PC software for calendering systems and punch tool management
Extension of the HMI for hardening machines and process value archiving
Software support for packaging lines in the pharmaceutical industry
Set-up of a label inspection station and conversion of print files
Delphi 7.0, Windows XP, MS-SQL 2005, Softing / INAT OPC, Profinet, Ethernet/IP

Feb 2005 - Jun 2005

5 months

Munich, Germany

Consultant Professional Services

ATOSS Software AG

Consulting and support in the areas of working time management and personnel scheduling
Configuration of the software solution and commissioning of terminals
Sales support in the presales area
Windows, AS/400, MS-SQL, Oracle, DB400, XML

Dec 1996 - Dec 2004

8 years 1 month

Eschborn, Germany

Consultant / Management and Coaching

LogicaCMG GmbH & Co.KG

Management and coaching of 40 developers at 3 locations
Implementation of individual client/server software solutions
Specialist in user interface ergonomics and trainer for PowerBuilder class libraries
Development of a customer reporting system for Deutsche Bank
Establishment of technical expertise and project management for BlackBerry handhelds
Evaluation of new development environments
Creation of a quality assurance tool for the Landeswohlfahrtsverband Hessen
Development of an invoicing system with SAP-FI interface for the Axel Springer publishing house
Creation of standard software for asset management at SER (SunGuard)
Development of a sales system for Woelm AG
MS-Project, OOA / OOD / OOP, PowerBuilder 5.0 – 7.0, Oracle, MS-SQL, ClearCase, XML, C++, Java, J2EE

Aug 1994 - Oct 1996

2 years 3 months

Mannheim, Germany

Software Developer

EVO Bus GmbH

Development of software for managing electrical plans in bus manufacturing
Excel, Access

Industry experience

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

Experienced in Information Technology, Manufacturing, Government and Administration, Healthcare, Banking and Finance, and Media and Entertainment.

Information Technology

Manufacturing

Government and Administration

Healthcare

Banking and Finance

Media and Entertainment

Business area experience

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

Experienced in Information Technology, Product Development, Project Management, Customer Service, Business Intelligence, and Research and Development.

Information Technology

Product Development

Project Management

Customer Service

Business Intelligence

Research and Development

Summary

I am a passionate IT professional and feel at home in several roles – from software and database developer to Product Owner and multi-project manager, covering digitalization and software development from the initial idea to the finished solution. I enjoy finding suitable solutions for my customers and developing interfaces that truly meet the requirements.

Skills

Main Areas Of Activity

Software Developer & Architect
Consultant
Product Owner
Project Manager

Industries

Industry
Plant Engineering And Packaging Industry
Public Sector
Financial Sector
Pharmaceutical And Food Industry
Critical Infrastructure

Tools And Technologies – Software Development

C# (20 Jahre)
Vb.Net (10 Jahre)
Winforms (20 Jahre)
Wpf (10 Jahre)
Blazor (2 Jahre)
Vb.6 (5 Jahre)
Visiwinnet (5 Jahre)
Nuget (10 Jahre)
Delphi (10 Jahre)

Databases

Ms-Sql, T-Sql (20 Jahre)
Ssis (10 Jahre)
Ssrs (20 Jahre)
Wcf (5 Jahre)
.Net Core (5 Jahre)
Asp.Net (5 Jahre)
Postgresql (5 Jahre)
Mariadb (5 Jahre)
Maxscale (5 Jahre)
Mysql (5 Jahre)
Vba (5 Jahre)
Oracle, Pl/Sql (5 Jahre)
Etl Processes (10 Jahre)
Replication
Geodata
Design And Optimization Of Large Databases
Automated Testing With Visual Studio
Nunit

Interfaces

Rest
Restsharp
Swagger
Opc
Rpc

Reports

Reporting Services
Crystal Reports
Powerbi

Other Tools & Technologies

Docker
Powershell
Mqtt
Directory Ldap
Tfs
Sourcetree
Tortoise Svn
Git
Jira
Confluence
Polarion
Visio
Legacy Experience With C#, Delphi

Operating Systems

Windows
Linux

Methodologies

Scrum
V-Model
Kanban
Rad

Additional

Requirements Engineering
Azure (4 Jahre)
Rabbitmq
Clean Code
Oop
Sql Server Management Studio (Ssms)
Heididb
Toad
Active Directory

Languages

German

Native

English

Advanced

Education

Oct 1993 - Jun 1996

Darmstadt University of Applied Sciences

Diplom-Informatiker (FH) · Computer Science · Darmstadt, Germany

Oct 1987 - Jun 1993

Darmstadt University of Applied Sciences

Diplom-Ingenieur (FH) · Electrical Engineering · Darmstadt, Germany

Certifications & licenses

Trainer according to IHK

Customer Orientation in Marketing

Conflict Discussions / Leading Meetings

CMG – Project Management Cycle

Oracle and PL/SQL

PowerStation Trainer Course

CMG-Master-Class PowerBuilder

Claude Code Masterkurs

IT Service Management GmbH

Statistics

Experience

Total positions 35

Experience in Information Technology 17.5 y

Avg length 1 y 1 m

Longest experience 8 y

Global experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Consultant, Requirements Engineer and Database Expert, Database Expert and Software Developer, Software Architect, Software Developer and Database Developer

Main industries Information Technology, Manufacturing, Government and Administration

Main business areas Information Technology, Product Development, Project Management

Qualifications

Highest degree Master

Certifications earned 11

Member since

July 2025

Last update

October 2026

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Frequently asked questions

Have questions? Find more information here.

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

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

Jörg has at least 31 years of experience. During this time, Jörg has worked in at least 24 different roles and for 33 different companies. The average length of individual experience is 1 year and 10 months. Note that Jörg may not have shared all experience and actually has more experience.

Based on recent experience, Jörg would be well-suited for roles such as: Consultant, Requirements Engineer and Database Expert, Database Expert and Software Developer, Software Architect, Software Developer and Database Developer.

Jörg's most recent position is Consultant, Requirements Engineer and Database Expert.

In recent years, Jörg has worked for Public sector, Healthcare, Logistics, Industry, and SRH private university.

Jörg is most experienced in industries like Information Technology, Manufacturing, and Government and Administration. Jörg also has some experience in Healthcare, Banking and Finance, and Media and Entertainment.

Jörg is most experienced in business areas like Information Technology, Product Development, and Project Management. Jörg also has some experience in Customer Service, Business Intelligence, and Research and Development.

Jörg has recently worked in industries like Energy, Manufacturing, and Information Technology.

Jörg has recently worked in business areas like Information Technology and Product Development.

Jörg holds a Master in Computer Science from Darmstadt University of Applied Sciences and a Master in Electrical Engineering from Darmstadt University of Applied Sciences.

Jörg has 11 certificates. Among them, these include: Trainer according to IHK, Data Protection Officer certified according to TÜV Süd, and Customer Orientation in Marketing.

Jörg is immediately available full-time for suitable projects.

Daily rate distribution

0% 25% 50% 75% 100%

<€640 €640-800 €800-960 €960-1120 €1280+

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.

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Daily rate avg. 798 €

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

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600

400

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