C# Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used C#
Burhan Dinler
Last position:
Enterprise Architect & Solution Architect at DB Netz AG
With project PRIZMA, DB will modernize its infrastructure on the one hand, and develop a fail-safe IT landscape on the other hand, which can be restored quickly and securely in case of a disaster.
- Capture current architectures of existing systems as well as methodical consulting and development of target architectures
- Deepen and maintain the building plan / target IT landscape
- Implement technical architecture concepts & architecture descriptions
- Implement migration concepts for updating and further developing the platform and information systems
- Assess submitted improvement suggestions as part of the project
- Capability management: identify capability gaps, develop target visions, and support transformation planning within the enterprise architecture.
- Create a compatibility matrix of the components in use and compare dependencies of specific versions
- Create an IT concept for extending the platform with the following topics: hardware and software requirements, security, licensing, high availability, load balancing, backup & recovery, update strategy, monitoring integration, etc.
- Coordinate with business architects as well as technical architects from the cross-functional architecture area of the PRISMA program for the topics (backup, Active Directory, monitoring, Citrix, and business applications ...)
- Status meetings and alignment of project planning with the Release Train Engineer / Project Manager
- Advise the Release Train Engineer / Project Manager in identifying project risks
- Advise the System Architect Engineers in steering the implementation of the concept
- Implement the IT concept
- Document the infrastructure
Label: MS Project, LINUX, Windows, ORACLE, Java, REST, SharePoint, Microsoft Exchange, UML, Enterprise Architect, BPMN, AZURE, AWS, V-MODEL, Micro Service, VisualStudio, SAP S/4HANA, SCRUM(SAFE), ESB (TIBCO), Python, Innovator, LeanIX (TOGAF), Ansible, Ansible Tower, Ansible Automation, ROBOT, SpringBoot
Christoph Sawicki
Last position:
Test Manager at Logistics
- Coordination and planning, execution, documentation, and analysis of test cases
- Development of test concepts considering best practices (e.g., test pyramid) with a focus on reliable, automatable test runs
- Implementation and maintenance of test cases according to the test concepts
- Technologies: Citrix Workspace, Shopify, Jira, Xray, MS Teams, MS SharePoint, Confluence, MS Office 365
Nenad Biresev
Last position:
Safety Video Analytics Project for Airbus at Airbus
- Developed a real-time video analytics proof-of-concept for deployment on NVIDIA Jetson edge devices.
- Implemented DeepStream pipelines including object detection, tracking, human pose estimation, face anonymization, and zone intrusion detection.
- Built a Qt/Python demonstration UI interfacing with the AI pipeline via REST APIs.
Rodion Orlinskiy
Last position:
Founder, CTO & Managing Director at MYNR Product Mining GmbH
- Responsible for the architecture and development of an AI-native SaaS platform for industrial product portfolio management.
- Designed the modern data platform architecture on Azure for scalable analytics and enterprise data integration.
- Built enterprise data ingestion and transformation pipelines across complex industrial system landscapes.
- Developed graph-based representations of product structures and dependencies for analytical reasoning.
- Designed and implemented an agentic AI framework for AI-supported decision workflows.
- Built scalable analytical microservices and integrated reporting through modern BI technologies.
- Coordinated backend, AI, and frontend development across the MYNR platform stack.
Yaroslav Shargorodskiy
Last position:
Senior Low-Code Consultant at Freelancer
Structured analysis and evaluation of business processes
Gathering, documenting, and prioritizing requirements
Creating business-friendly and technically executable process models
Use of Camunda tools
Deriving requirements and interfaces from BPMN diagrams
Coordination with stakeholders and business units
Translating business requirements into technical solution designs
Implementing efficient and tailored applications
Systematic collection, analysis, and documentation of requirements
Prioritizing and validating requirements in close collaboration with stakeholders
Alignment between business and development to ensure shared objectives
Creating use cases, user stories, and acceptance criteria
Continuous requirements and change management throughout the project lifecycle
Define project goals and create project plans
Delegate tasks and monitor project progress
Monitor budgets and inform stakeholders
Mendix: Architecture, development, and maintenance of custom applications (Microflows, Domain Model, Security, XPath)
Modeling Mendix workflows for process optimization
Develop scalable apps with Mendix including REST/SOAP integration with SAP, SQL, Azure & SharePoint
UI design for Mendix using Atlas UI, Fluent UI, HTML, CSS, JavaScript
Develop web & mobile apps with Mendix using agile methods (Scrum, Kanban)
Implement business logic with Mendix Microflows and Nanoflows
Performance optimization and architecture improvements for Mendix applications
Conduct Mendix training
Create technical documentation and best practices for Mendix
Coaching and mentoring for low-code development with Mendix
Rainer Langbehn
Last position:
Senior IT Consultant, Senior Software Architect, Senior Software Developer, Senior DevOps Engineer at Techniker Krankenkasse
Automation of the database major / minor releases for the TKeasy project
Concept for database major / minor release automation
As-is analysis
Evaluation of Redgate Flyway functionality
Concept creation
Products: Redgate Flyway, GitHub, Quest, Erwin Data Modeller, Oracle, Atlassian Jira, Atlassian Confluence
Skills: Docker, Continuous Delivery, Continuous Integration, Redgate Flyway, Major Releases, Minor Releases
Melanie Taylor
Last position:
Founder and Game Director at MELLOW Games UG (haftungsbeschränkt)
I won the "serious games funding" from the state of NRW in Germany at the end of 2023 for my game Blueberry. This gave me the chance to put together an international team of freelancers for programming, art, animation and audio. I developed the complete UI and UX as well as level and narrative design for the game, implementing the UI in Unity in close collaboration with my programmer. Blueberry will be released on Steam, Xbox, PS5 and Switch on 28th May 2026.
Stefan Marx
Last position:
Bundesrechtsanwaltskammer
- Design, planning and execution of complex acceptance tests for a document exchange platform for the German justice authorities.
- Validation of decrypted and certificate-based message exchange via web platform, mobile app, and Java API.
- Documentation of test cases, execution steps, and test results.
- Technologies: Windows 11/10, Ubuntu, iOS, Android, Bash for Windows, Java 17, IntelliJ, Git, Jira, Confluence, Citrix Server, xJustiz standard implementation, specific justice software.
Alexander Rautzenberg
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
Ayhan Gezer
Last position:
Senior QA Engineer / Test Automation Engineer / SDET at Rewe digital
Consulting, designing, and implementing the software testing lifecycle for multiple Android apps and backends Introducing test automation with Appium, SpringBootTest, RestAssured Setting up and managing emulators Developing an E2E library, an integration library, a Testcontainers library, and other libraries Developing, implementing, and advising on CI strategies Building the test environment with Testcontainers and virtualization Developing and implementing test cases for integration tests and end-to-end tests Establishing a maintainable test architecture with low entry barriers to simplify the creation of automated tests Some tools and technologies used: JUnit, RestAssured, Testcontainers, Kubedock, Appium, Android emulator, Jira Xray, Mockito, WireMock, Spring Framework, Kotlin
Brahim Ahmat
Last position:
Lead Developer at Blazor Web App at WAITS Software- und Prozessberatungsgesellschaft mbH
- Web development with Blazor
- Two-factor authentication for Blazor applications
- Uploading and downloading files
- Bug fixes for existing applications
- Programming interfaces
- Integration of third-party tools and technologies
- Creation of developer tests (unit tests)
Andreas Ernst
Last position:
Consultant at Iteratec GmbH
Kai Birkenbusch
Last position:
Freelance CPQ Consultant (Full-Time) at Freelance CPQ Consultant
- Independent CPQ consulting for a portfolio of industrial manufacturers, including Scheidt & Bachmann, Trützschler Group SE, and Weiss Klimatechnik GmbH (Schunk Group)
- Full project coverage: requirements analysis, concept, system design, implementation, testing, and international go-live support
- Deep integration work with SAP ECC (material master replication, SD document creation, material creation, general APICONNECT and other web service interfaces)
- Process consulting: analysis and optimization of internal quoting processes for sales and management
- Knowledge transfer/coaching and pair programming to strengthen internal team skills
Florian Rubel
Last position:
Senior Fullstack Developer at Ivii GmbH
- Two-month modernization of the management UI for AI-powered cameras
- Rewrote a complex React application to Vue 3 with single file components
- Set up the core architecture of the Vue application and configured Vite, Pinia, Router, I18n, ESLint, and Prettier
- Custom integration of Leaflet to display detection zones on images
- Assisted with backend extension and authentication adjustments
Vladimir Maznicenko
Last position:
Developer at Financial services provider
- Support and further development of a framework for developing applications in a banking association: DynS/OSPE
- Migration of the framework to Java 11 and Java 17
- Java8, Java11 and Java17, Spring, Spring-Batch, Spring WebServices, Spring-Security, Spring-Data, JPA, Hibernate, OpenSource libraries etc.
- XML, JAXB, JSON, REST and SOAP services, DB2, Oracle, WebSphere or Liberty AS, FreeMaker, Junit, mock libraries, JaCoCo, Maven, IntelliJ, Eclipse, GitHub, SVN, Jira
Discover over 15,000 top freelancers
Statistics of experts using C#
Aggregated from the professional profiles of matched freelancers.
Experience
21 years (Germany: 20 years)
Position duration
2.9 years
Positions per freelancer
14
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Government and Administration, Banking and Finance
Certification focus areas
Project Management, Information Technology, Product Development
Bachelor's degree or higher
95% (Germany: 88%)
Master's degree or higher
75% (Germany: 54%)
Doctorate
5% (Germany: 8%)
Certifications per freelancer
2 (Germany: 3)
Most common languages
German, English, Turkish
Speak two or more languages
100% (Germany: 97%)
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Cologne 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 Cologne 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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
What C# Covers
C# is a general-purpose language for building software on the .NET stack. Teams use it for web services, business applications, desktop tools, cloud services, and internal systems that need structure and long-term maintainability. It is a common choice for product teams that want strong typing, clear code, and broad platform support.
Typical Deliverables
- ASP.NET Core APIs and web backends
- Web apps with Blazor or server-side rendering
- Windows desktop tools with WPF or WinForms
- Cloud services for Azure and container platforms
- Background jobs, integration services, and worker processes
Ecosystem And Tooling
C# projects often rely on .NET, ASP.NET Core, Entity Framework Core, NuGet, and Visual Studio or Rider. Strong specialists know how to shape solution structure, manage dependencies, write tests, and keep the codebase easy to extend. They also understand how C# fits with modern libraries, authentication flows, and deployment pipelines.
When Freelance Help Fits
Companies bring in freelance C# experts when they need to ship a new service, stabilize legacy .NET code, or add features to an existing product without slowing the team down. It is also useful when a project needs a short burst of help for migrations, performance work, API design, or code review. In Cologne, this often works well for teams that want nearby collaboration in German or a remote setup with clear communication.
What Strong Specialists Do
A strong C# professional writes code that is readable, testable, and easy to change. They handle async work well, keep business logic separated from infrastructure, and know where C# is a fit versus where another stack is better. You should expect practical decisions around error handling, security, and maintainability, not just feature delivery.
Common Search Terms
C# is often searched together with C Sharp, .NET, ASP.NET Core, and Entity Framework Core. That usually points to the same hiring need: someone who can work across the language, framework, and data layer. For companies in Cologne, the key question is whether the expert can fit the codebase, the delivery pace, and the team setup.
Frequently asked questions
Need clarity? These are the questions we hear most often about C#.
C# is used for web services, internal business systems, desktop applications, cloud workers, and API layers on the .NET stack. Companies choose it when they need structured code, good tooling, and a language that works well across backend and desktop work. It is also common in products that need long-term maintenance and clear test coverage.
C# is often compared with Java for backend systems, TypeScript for web-centric product teams, and Python for faster scripting or data-heavy tasks. It usually stands out when a company wants strong typing, mature tooling, and a broad .NET ecosystem. The best choice depends on the existing stack and the kind of deliverable the team needs.
A strong C# specialist usually also knows ASP.NET Core, Entity Framework Core, SQL, REST APIs, and testing tools such as xUnit or NUnit. For cloud work, Azure and container basics are often important. For front-end-heavy projects, knowledge of Blazor, HTML, and JavaScript can help too.
A small feature task may only need a solid C# professional who can work inside an existing codebase. A migration, architecture cleanup, or performance issue usually needs someone who has shipped similar .NET systems before. The more integration points, legacy code, and production risk you have, the more you benefit from deeper specialist experience.
Yes, most C# work can be done remotely if the team has clear requirements, access to the codebase, and a reliable review process. Cologne-based teams often choose a hybrid setup when workshops, onboarding, or stakeholder meetings matter. Remote collaboration works best when the expert communicates well in the team’s preferred language and tools.
Ask which part of the stack the C# specialist has handled: APIs, authentication, data access, background jobs, or UI work. Also ask how they approach testing, deployment, and code review. For ASP.NET Core or broader .NET work, it helps to hear concrete examples of systems they improved, not just frameworks they have used.
Look for clear explanations, clean code structure, and practical decisions about testing and error handling. A good C# expert can explain trade-offs around performance, maintainability, and framework choices without hiding behind jargon. Sample code, past refactors, and the way they talk about legacy systems are often more useful than broad claims.
Yes, C Sharp is the common spoken name for C#. Searchers often use both terms when they look for the same skill set. In hiring, it usually means the same thing: someone who can work with the language and the .NET ecosystem around it.
The average hourly rate of freelancers in Cologne, Germany who have used C# in their recent projects is 92 €, which corresponds to a daily rate of about 739 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used C# in their recent projects, 95% hold at least a Bachelor's degree, 75% hold at least a Master's degree, and 5% hold a doctorate.
On average, freelancers in Cologne, Germany who have used C# in their recent projects have 21 years of professional experience, with a single engagement typically lasting around 2.9 years.
The most common languages among freelancers in Cologne, Germany who have used C# in their recent projects are German (100%), English (100%), and Turkish (16%).
The most common industries among freelancers in Cologne, Germany who have used C# in their recent projects are Information Technology (100%), Government and Administration (52%), and Banking and Finance (44%).
The most common business areas among freelancers in Cologne, Germany who have used C# in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (64%).
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 
Frankfurt 
Stuttgart 
Dusseldorf 
Dortmund 
Essen 
Nuremberg Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
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We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
