C# Experts in Dusseldorf
for reliable business software, matched in minutes with vetted and available freelancersHire experts who build .NET web applications, APIs, desktop software and cloud services with C#, ASP.NET Core and Microsoft Azure. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your technical and project requirements.
Meet FRATCH Experts in Dusseldorf, who have recently used C#
Timo T.
Last position:
Gronic Ident & Sign at Gronic Systems GmbH
Gronic Ident & Sign
Core technologies: Android, Jetpack Compose, Retrofit, Regula Document Reader, Adobe Sign
Android app on dedicated devices for identifications and electronic signatures at the PoS
Youness R.
Last position:
Communication modernization and recipe management between S7-300, S7-1500 and WinCC V7 at Siemens AG
- Consulting and development of suitable communication concepts between S7-300 and S7-1500, taking the existing PROFIBUS infrastructure into account
- Technical support for connecting the S7-300 controllers to the existing recipe data block of the S7-1500
- Assisting in the development of the communication sequence for recipe access (read, write, acknowledge, status handling)
- Configuration of S7 communication (PUT/GET)
- Creation and adaptation of WinCC V7 scripts (C scripts and VBS scripts) for WinCC-based recipe management
- Development, optimization, and integration of recipe processes into the existing WinCC project structure
- Commissioning of the new communication interfaces and recommissioning of the recipe logic on existing systems
- Creation of technical documents: communication sequences, functional descriptions, commissioning documentation
Saruna M.
Last position:
Master's Thesis at Heinrich Heine Universität
- Title: Enhancing Syntactic Awareness in Transformer Language Models for Hindi Dependency Parsing
- Investigated syntactic knowledge captured by transformer language models (RoBERTa, XLM-RoBERTa) for Hindi dependency parsing, a morphologically rich and low-resource language.
- Developed structure-aware model variants (Struct_Roberta_hi, Struct_XLMR) by integrating a CNN-based parser network between transformer layers, inspired by the StructFormer architecture.
- Conducted extensive error analysis including label-wise, distance-based, direction-based, sentence length-based, and LVC/Non-LVC evaluations.
- Evaluated models on downstream NLP tasks (NER, POS tagging) using the IndicXTREME benchmark.
Thorsten L.
Last position:
Senior Security Analyst
- Analysis and remediation of security vulnerabilities in a risk assessment system for energy trading
- System analysis
- Threat modeling
- Decision-making on vulnerability mitigation strategies
- Implementation of vulnerability detection mechanisms
- Security scans
- DevSecOps practices
- Technical environment: Visual Studio Code, JetBrains Suite, MS Threat Modeling Tool, DevSecOps, Git, AWS, DynamoDB, SQL Server, Endur, Snowflake, Orca
- Languages: C#, JavaScript, TypeScript, Python, PowerShell, Bash, Terraform, SQL
Olaf R.
Last position:
DevOps Architect / Consultant at Authority with increased security requirements
- Identification of requirements (legal, organizational, and technical)
- Design of solution architectures
- Evaluation of concepts and technologies
- Preparation of decision templates
- Architectural Decision Records (ADR)
- Coordination of implementation
- Review of implementations
- Documentation
Klajdo F.
Last position:
Independent Product Developer / Software Architect at rastr.eu
- Architected and deployed a live B2B geocoding and demographic-data platform for Germany, combining address lookup with census-based population statistics through a web application and REST API.
Rachid R.
Last position:
Self-employed at R&A Engineering GmbH
- Development and programming of PLC controls and servo drives, such as TIA-Portal, Siemens Step7 Classic, RSlogix/Studio5000, Unity Pro and CODESYS
- Visualization systems WinCC, FactoryTalk VIEW
- Integration of various fieldbuses into automation devices (PROFIBUS, PROFINET, DeviceNet, ControlNet, Ethernet/IP, MODBUS)
- Programming of scripts (C# / VB.Net / VBscript / VBA)
- Selection of electrical components and systems
- Commissioning and optimization of simple to complex systems and machines
- Planning and creation of electrical schematics
- Preparation of installation plans
- Preparation of bills of materials and technical calculations
- Feasibility studies
Andreas G.
Last position:
Senior Fullstack .NET (Core) & Angular Developer at IT Service Provider
- Supporting several agile teams in the new product development of an enterprise CRM and ERP application
- Web frontend development with Angular 17–21 (microfrontends, Domain-Driven Design, MDB-Bootstrap)
- Backend development with C# and .NET 7–10, MongoDB, MassTransit, RabbitMQ, Entity Framework Core, ElasticSearch (microservices, DDD)
- Technical feature design for assigned tasks
- Technical architecture design including forward-looking planning of AI-supported extension options
- Proof-of-concept implementation of AI-supported workflows with n8n and a locally hosted LLM (Ollama)
- Coordination with stakeholders and Product Owners, support with sprint planning
Result: Delivery of production-ready microservices and frontend modules in agile sprint cycles.
Environment: .NET 7–10 · Angular 17–21 · C# · TypeScript · OpenAPI · Microfrontends · DDD · Kubernetes · Docker · Helm · MS SQL Server · PostgreSQL · MongoDB · MassTransit · RabbitMQ · EF Core · ElasticSearch · Kibana · Azure DevOps · KeyCloak · n8n · Ollama
Frank M.
Last position:
Plan & Code Automation UG
- Operations and rehabilitation
- During this time, development of:
- Websites zentivo-holding.com zyntra3d.com plancodeautomation.com
- Stock trading software
- Automated trading of all financial instruments listed on the stock exchange, with AI integration
- Project management software
- Automated project administration and project management with automated creation of material lists, electrical schematics, PLC programs, HMI programs, AI functions in control technology, project schedules and cost calculations, as well as quotation preparation and cost tracking.
- AI integration
- 3D printing management
- Various methods for creating 3D models from photos, videos or drawings.
- Creation of files suitable for 3D printing, 3D printer management via API.
- AI integration
Tools: Visual Studio, Codex and Cursor, HTML, Java, Python, PHP, C#, Python, SQL, Jason Script.
Daniel P.
Last position:
Freelance specialist in industrial automation technology at dPSolutions
- Self-employed PLC and software specialist focusing on automation and special-purpose machinery
- Programming, modernization, expansion and optimization of production systems, focusing on increased efficiency, 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)
- Integration of external systems such as reading devices, printers, scales, scanners and cameras, as well as various bus systems (Ethernet, Profinet, Profibus, EtherCAT, CAN bus, RS232, TCP/IP)
- Creation of visualizations and HMI applications with Siemens WinCC flexible, Beckhoff HMI and .NET frontends
- Planning, development and integration of machine vision solutions (Keyence, Cognex, AVS Alfavision, camera systems) in PLC and PC environments
- Design and implementation of process data collection 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
- Planning and programming of conveyor, inspection, assembly, packaging and grinding systems in industries such as automotive, chemical, food, electronics, machinery and systems engineering
- Conducting workshops and training on Siemens TIA Portal, STEP7 Classic, Beckhoff TwinCAT (including TwinSAFE), as well as topics such as 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 requirements analysis through planning, concept development and supplier coordination to commissioning, production support and customer support
Lutz E.
Last position:
Freelance Software Developer – GoPro MultiCam Control via COHN at Plutos Company UG
- Development of a pilot system to control and monitor multiple GoPro cameras
- Implementation of start, stop, status, media, download, and diagnostic functions via COHN endpoints
- Realization of camera detection, single and group control, as well as stable session/keep-alive logic
- Setup of a download pipeline with queue, retry handling, and temporary files
- Consistent session, folder, and file naming for multi-camera recordings
- Integration of provisioning, certificates, and network operations
Younes H.
Last position:
Senior Backend Developer at PTA
- Development and maintenance of database-driven applications for managing supplier and food contracts, with extensive use of Oracle PL/SQL for complex business logic and data processing
- Optimization of PL/SQL procedures, functions, and triggers to ensure the performance and scalability of Oracle database solutions
- Ensuring compliance with best practices in PL/SQL development and implementing standards for code quality and data integrity
- Close collaboration with backend and frontend teams to ensure smooth integration between the Oracle database, C#-based APIs, and Azure cloud services
Alexander R.
Last position:
Business Analyst at Financial Services Provider Landesbank
The Helaba ATLAS project aims to modernize core systems and make them future-proof. As part of the subproject, the existing legacy system for international payments is being replaced by a modern web-based application.
- Analysis of functional and technical requirements
- Analysis and optimization of business processes
- Process modeling
- Preparation and facilitation of workshops
- Defining project scope and prioritizing requirements
- Business process management (analysis, modeling, and optimization)
- Specification of user stories
- Designing business and authorization concepts
- Testing and acceptance
- Designing mockups in Figma
- Creating the UI/UX style guide for web applications Approach: Scrum (agile) Technologies: Jira, Confluence, MS Teams, Conceptboard, Java, Vaadin, Figma
Benjamin W.
Last position:
SAP Basis at IT Baden-Württemberg (BITBW)
- SAP Basis operations for complex SAP system landscapes (ABAP and Java stacks)
- Administration, monitoring, and optimization of SAP systems with regard to availability, performance, and stability
- Planning and execution of data center moves as well as migrations of SAP systems and databases
- Handling of incidents, changes, and problems according to ITIL processes, including root cause analyses
- Creation of technical concepts, operations documentation, and implementation plans
Technologies: SAP NetWeaver, ITIL processes, technical migrations
Karan S.
Last position:
Senior Software Engineer at Infosys Ltd
- The Forecasting Cost Tool (PCCT) imports data from CSV files via SSIS and processes modules for administration, user management, train operations, and fleet operations.
- Conducted requirements analysis and effort estimation.
- Designed the database and developed web pages.
- Tested the application.
Discover over 15,000 top freelancers
Statistics of experts using C#
Aggregated from the professional profiles of matched freelancers.
Experience
22 years (Germany: 20 years)
Position duration
2.3 years (Germany: 2.9 years)
Positions per freelancer
18 (Germany: 14)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Manufacturing, Banking and Finance
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
74% (Germany: 88%)
Master's degree or higher
41% (Germany: 53%)
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
97%
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Dusseldorf are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Dusseldorf using C#
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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
C# experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (84%)
- Manufacturing (63%)
- Banking and Finance (50%)
- Retail (44%)
- Professional Services (41%)
- Energy (38%)
- Government and Administration (38%)
- Telecommunication (38%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What C# is used for
C# is a strongly typed, object-oriented programming language from Microsoft. It is the main language of the .NET ecosystem and supports web applications, APIs, desktop software, cloud services, games and internal business systems. Its tooling suits both new products and long-running enterprise applications.
.NET ecosystem
C# specialists commonly work with .NET, ASP.NET Core, Entity Framework Core and LINQ. They may also use Microsoft Azure, SQL Server, Docker, REST, gRPC, message brokers and CI/CD pipelines. Visual Studio, JetBrains Rider and the .NET CLI support development, testing, debugging and delivery across operating systems.
Typical project work
- Create ASP.NET Core APIs and distributed services
- Modernize older .NET Framework applications
- Connect C# systems to databases, queues and external services
- Build Windows desktop applications with WPF or WinUI
- Deliver Unity gameplay systems and interactive applications
C# work often includes domain modelling, authentication, performance tuning, automated testing and production support. The right approach depends on the application’s age, deployment model and integration landscape.
When freelance expertise helps
Companies bring in freelance C# professionals for a new product, a migration from .NET Framework, a temporary delivery gap or a difficult integration. They are also useful when an internal team needs focused support with Azure architecture, API reliability, legacy code or release automation. In Dusseldorf, remote collaboration can work well for distributed teams, while on-site workshops may help with complex business processes and German-language stakeholder communication.
Signs of strong specialists
- They explain trade-offs between .NET versions, hosting models and service boundaries
- They write clear, testable C# and protect important business rules
- They understand async programming, dependency injection and observability
- They can review legacy code without disrupting live operations
- They connect technical decisions to security, maintainability and delivery risk
Strong professionals ask about users, data flows, deployment and operational ownership before proposing a solution. They leave behind documentation, tests and a structure that the client team can maintain.
Choosing the right fit
Assess specialists through a relevant portfolio, a focused technical discussion and a review of representative code or design decisions. Match the brief to the needed scope: a small API extension differs from a migration, a high-throughput service or a Unity application. Confirm their adjacent experience with databases, cloud infrastructure, testing and collaboration practices before work begins.
Frequently asked questions
Questions about C#? Start with the answers below.
C# is used for web applications, REST and gRPC APIs, desktop software, cloud services, automation tools and games made with Unity. It is also common in internal business systems that connect databases, workflows and external services.
C# and Java both support strongly typed, object-oriented enterprise software and have mature ecosystems. TypeScript is often chosen for browser and full-stack JavaScript work, while C# offers close integration with .NET, Azure and Microsoft development environments.
C# work often requires knowledge of .NET, ASP.NET Core, SQL, Entity Framework Core, REST APIs and automated testing. Depending on the project, Azure, Docker, Kubernetes, messaging systems, React or Angular may also be relevant.
C# project needs depend on its risk and scope rather than on the language alone. A contained feature may suit a capable specialist with focused experience, while a migration, regulated system or distributed platform calls for someone who has handled similar production conditions.
C# projects are often well suited to remote collaboration because code, documentation, tests and deployments can be shared digitally. For teams in Dusseldorf, agree on meeting routines, decision ownership and whether German-language communication is needed for business stakeholders or on-site workshops.
C# is a strong choice when a project needs reliable business logic, mature tooling, clear typing and access to the .NET ecosystem. It fits especially well when the team already uses Microsoft services, Azure or existing .NET components.
C# quality is visible in clear design decisions, focused tests, safe error handling and code that is easy to change. Ask the specialist to explain trade-offs around async operations, dependency injection, data access, security and observability using a relevant project example.
C# professionals should clarify the target .NET version, application architecture, deployment process, coding standards and ownership of production support. They should also understand legacy constraints, database dependencies, team practices and how success will be reviewed.
The average hourly rate of freelancers in Dusseldorf, Germany who have used C# in their recent projects is 93 €, which corresponds to a daily rate of about 744 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used C# in their recent projects, 74% hold at least a Bachelor's degree and 41% hold at least a Master's degree.
On average, freelancers in Dusseldorf, Germany who have used C# in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 2.3 years.
The most common languages among freelancers in Dusseldorf, Germany who have used C# in their recent projects are German (100%), English (97%), and French (19%).
The most common industries among freelancers in Dusseldorf, Germany who have used C# in their recent projects are Information Technology (84%), Manufacturing (63%), and Banking and Finance (50%).
The most common business areas among freelancers in Dusseldorf, Germany who have used C# in their recent projects are Information Technology (97%), Product Development (91%), and Project Management (75%).
Main locations of FRATCH Experts, who have recently used C#
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.
Berlin 
Hamburg 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Dortmund 
Essen 
Bremen 
Nuremberg Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
