C Experts in Dusseldorf
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Meet FRATCH Experts in Dusseldorf, who have recently used C
Alwin G.
Last position:
IT Interim Manager & AI Strategist
- AI product development: Design of an AI-supported GRC platform to automate compliance processes.
- AI expertise: Strategic deepening in Agentic AI and GenAI as a core asset for modern IT governance
- IT interim management and strategic consulting
Rudolf Eggelbusch
Last position:
Datacenter Engineer, Network & Security Administrator at International insurance group
Operation and further development of the network and security infrastructure.
Monitoring, analysis and resolution of network and security incidents.
Cross-department collaboration with other specialist teams for operations, further development and reporting.
Firewall vulnerability analysis.
Firewall rule approvals.
Troubleshooting IP communication issues in the network and firewall infrastructure.
Security-critical IT infrastructure, processing of personal data, compliance with legal regulations.
Products: Palo Alto Networks Firewalls, Cisco ACI, Checkpoint Firewalls, F5
Technologies: SDN, SDWAN, Cisco EPIC, Cisco ACI
Achim B.
Last position:
Software Developer / Integration, Test & MBSE
- Integration of ADAS components in different project roles as integrator, tester and debugger, including BMW KAFAS4 camera system and ZF Full Range Radar.
- Connection and visualization of radar sensor data via ROS2 (Linux) to support sensor fusion and...
Sergei Minkov
Last position:
Program Manager / Program Lead (Contractor) at Telefonica
Program Manager for a radical architecture and IT transformation program (RAITT) reshaping the applications landscape (i.e. cloud transformation) and operating model into agile organisation.
- E2E readiness towards mass-market business division covering demand, delivery, test and roll-out phases
- Driving Telefonica internal teams and external system integrators to ensure delivery on time and in quality in adherence to defined processes
- Management of risks, issues and dependencies on program level
Kacper Kowalski
Last position:
Author
Seqnaut and Sycosm (WIP) – Embedded Audio DSP & Synthesis Platform
- Embedded audio DSP framework — synthesizers, effects, drum machines; modular audio graph
- Sequencing: PianoRoll, StepGrid, MasterClock; 8-voice polyphonic synth; CLI + OSC
- Transient Detector — dual-envelope adaptive threshold, guitar attack detection
- Hardware: Teensy 4.1, custom AFE design tapping BOSS GX-100; MIDI FX integration
Label: C++23, C, Python, CMake, FreeRTOS, Teensy 4.1 (ARM Cortex-M7), Teensy Audio (Stoffregen), DaisySP, I2S/SAI, OSC, MIDI
Thorsten Lenzen
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
Stanislaus Stelle
Last position:
Security Consultant at Rohde & Schwarz AG at Star Labs GmbH
- Worked on FPGA enhanced network encryption device with secure boot, TPM2.0 and smart card integration for BSI approved usage with Post Quantum Cryptography
- Developed and audited Linux drivers
- Collaborated using GitLab, Gerrit, Confluence and Jira
- Technologies: C, C++, Secure Boot
Hans-Dieter Große-Kreul
Last position:
Training as an AI Expert
I continuously expand my expertise in AI and automation, working with ChatGPT, OpenAI, Manus, Gemini, MS CoPilot, API, LangChain, Hugging Face, Manus, TensorFlow and Auto-GPT as well as Python-based ML frameworks and MLOps tools to intelligently transform classic software development, analysis, and testing processes.
Ehsan Amin
Last position:
Clinical Data Scientist at Freelance
- Conduct data management and statistical analysis for clinical studies on behalf of CROs.
- Guest lecturer at Ivancity University, Paris, specializing in data anonymization techniques and statistical disclosure control.
- Provide scientific and medical writing services for pharmaceutical companies.
- Perform optical mapping data analysis and develop software tools with a focus on algorithm optimization and technical support.
Andreas Wißkirchen
Last position:
Freelancer at Infrafibre Networks GmbH
- Assessing the current status (planning stage / rollout status) of the so-called inter-polygon routes
- Creating an end-to-end project plan for the individual routes, considering active and passive components and tasks
- Monitoring and controlling the implementation of the plan
- Optimizing the chosen network architecture
- Creating network and splice diagrams
Alois Gruber
Last position:
Bank DZ Privatbank S.A.
- Various programming tasks as specified
- Work carried out from home office, meetings/tasks via email, phone and Microsoft Teams
- Version control via GIT
- Implementation with RDI, FreeSQL SQL
- Extension of automatic test environment creation as specified - adding automatic transfer of existing iSeries users and preparation as well as anonymization of test data
- Creation of trigger and service programs in SQLRPGLE, FreeRPG, ILE RPG and CLLE
- Development and implementation of the CallKredite project including additional extensions for other departments
- Conversion of RPG to Free-RPG and SQL as well as extension of existing modules as specified
- Migration to a new banking release
- Support for specialist segment / OIV
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
Jan G.
Last position:
Master Data Application at confidential
Visualization, search, and maintenance of various types of master data, providing them via a REST API, and implementing a variety of import and export formats.
Implementation, architecture, project management.
Technologies and tools: Angular (Signals, Signal Store, swagger-codegen, standalone components), Java, PostgreSQL, ActiveMQ, JavaScript, Spring Boot (Spring Core, Spring MVC, Spring Data/JPA via Hibernate, Spring Security, Spring Modulith), JUnit, Flyway, QueryDSL, GraphQL, REST API, Node, npm, Maven, SonarQube, GitLab CI/CD pipelines, Docker, Nexus, OpenAPI + Swagger UI, Keycloak, OAuth2, OpenID Connect, IntelliJ IDEA, Jira, Confluence.
Sebastian Chece
Last position:
Public institution responsible for educational institutions in NRW
- Consulting on processes and execution of load tests, performance tests and technical tests of various applications: web portal, file cloud, email, video conferencing, learning/course platform
- Creating the load test framework
- Programming test scripts (JMeter, Selenium)
- Developing batches to support the evaluation
- Executing load tests and evaluating results, including clear reporting, recommendations for action, and bottleneck analysis
- Managing tasks and collaboration to achieve meaningful load test results
Artur Grod
Last position:
Health & Safety Consultant/Fasi/SiGeKo; SiGeKo/Senior HSC Manager at Self-employed
Since January 2026: GP.EU Amazon project
DBE3 P12 Berlin: SiGeKo, implementing regulations, employee training, documentation, safety processes (general contractor)
DNX1 Frankfurt: HSE Manager, safety inspections, risk management, RAMS documents
HJA8 Hannover: SiGeKo, implementing regulations, employee training, documentation, safety processes (general contractor)
DNX2 Wuppertal: SiGeKo / Senior HSC, reporting, HSE audits, DGUV/BetrSichV, RAMS documents
DNW5 Troisdorf: SiGeKo/HSC coordinator, prevention planning, site inspections, subcontractor support, safety process control (general contractor)
May 2024 to August 2025: C HSE Supervisor/SiGeKo (GP.EU.Loyenbasell-Jetty II- Cologne)
Advising on safety measures and implementing safety regulations
Monitoring legal requirements on construction sites
Coordinating safety and health protection in construction management
Discover over 15,000 top freelancers
Statistics of experts using C
Aggregated from the professional profiles of matched freelancers.
Experience
25 years (Germany: 23 years)
Position duration
2.4 years (Germany: 3.1 years)
Positions per freelancer
17 (Germany: 14)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Manufacturing, Telecommunication
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
68% (Germany: 88%)
Master's degree or higher
37% (Germany: 61%)
Doctorate
5% (Germany: 11%)
Certifications per freelancer
4 (Germany: 3)
Most common languages
German, English, Russian
Speak two or more languages
96% (Germany: 98%)
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 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 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
C in practice
C is a systems programming language for software that must stay close to the hardware. Teams use it for embedded firmware, operating systems, device control, and performance-sensitive libraries. It is also common in long-lived codebases that need careful maintenance.
Where it fits
- Embedded devices and firmware
- Drivers, boot code, and runtime components
- Network tools, databases, and system utilities
- Audio, video, and industrial software
C still appears where predictable memory use and direct control matter more than abstractions. In Dusseldorf, that often means industrial, telecom, and product teams that need specialists who can work on existing code with care.
Tooling and ecosystem
A strong C specialist knows the compiler, linker, debugger, and build setup around the code. Common work includes GCC or Clang, Make or CMake, static analysis, unit tests, and careful handling of headers, libraries, and build flags. The real job is not only writing functions, but keeping the code base stable and portable.
When companies need help
- A legacy C code base blocks new features
- A release has memory or crash issues
- A device or service needs optimization
- Internal staff need review or temporary support
Freelance expertise is useful when a team needs focused help without long onboarding. That is common for audits, refactoring, porting, and urgent fixes, especially when on-site work in Dusseldorf must fit with remote collaboration for reviews and delivery.
What strong specialists do
Good C professionals write code that is clear, small, and safe to maintain. They understand pointers, memory allocation, data layout, error handling, and undefined behavior, and they can explain trade-offs in plain language. They also review existing code for weak spots before changing it.
C across older and modern code
C is often the base layer beneath other languages, tools, and services. Teams may ask for help on ANSI C, ISO C, or older K&R C code that still runs in production. The best specialists can work across old interfaces and modern standards without breaking compatibility.
Frequently asked questions
Key details about C, drawn from the questions we get asked most.
C is used for software that needs direct control over memory, hardware, or timing. That includes embedded firmware, drivers, operating-system parts, network utilities, and performance-critical libraries. It is also common in older production systems that still need careful change management.
C freelance support makes sense when a team needs focused help on a legacy code base, a hard bug, or a short technical review. It is also useful when internal staff know the product but not the low-level details well enough to move quickly. A specialist can step in for audits, refactoring, porting, or release support.
C gives very direct control and a small, predictable runtime, which is why it stays common in system and embedded work. C++ adds higher-level features, while Rust focuses more on memory safety by design. The right choice depends on existing code, platform constraints, and how much abstraction the project can accept.
A strong C specialist usually knows memory management, pointers, data structures, debugging, and build tools such as GCC, Clang, Make, or CMake. They should also be comfortable with version control, static analysis, and reading existing code that was written years ago. For embedded work, hardware interfaces and register-level thinking matter too.
A C project often needs more than syntax knowledge. The important part is experience with debugging crashes, tracking memory issues, and understanding how the code behaves on the target system. For critical software, choose someone who has already worked in a similar environment or code base.
Yes, C work is often done remotely because most tasks involve source code, builds, tests, and reviews. On-site time in Dusseldorf can still help when a project needs access to hardware, internal systems, or close collaboration with product and operations teams. Many projects use a mix of both.
Look for code that is simple, safe, and easy to review. A strong C expert explains trade-offs, spots undefined behavior, and can show how they test changes and handle edge cases. Good signs are clear reasoning, careful debugging, and respect for the existing code base.
C is standardized, so people may refer to ANSI C or ISO C when they mean a defined language version and its rules. In practice, this matters for portability, compiler behavior, and how safely code can be moved between systems. A good specialist knows when old code follows a narrow dialect and when modern standard C is available.
The average hourly rate of freelancers in Dusseldorf, Germany who have used C in their recent projects is 103 €, which corresponds to a daily rate of about 822 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used C in their recent projects, 68% hold at least a Bachelor's degree, 37% hold at least a Master's degree, and 5% hold a doctorate.
On average, freelancers in Dusseldorf, Germany who have used C in their recent projects have 25 years of professional experience, with a single engagement typically lasting around 2.4 years.
The most common languages among freelancers in Dusseldorf, Germany who have used C in their recent projects are German (96%), English (96%), and Russian (13%).
The most common industries among freelancers in Dusseldorf, Germany who have used C in their recent projects are Information Technology (71%), Manufacturing (71%), and Telecommunication (67%).
The most common business areas among freelancers in Dusseldorf, Germany who have used C in their recent projects are Information Technology (96%), Product Development (92%), 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 
Leipzig 
Dortmund 
Essen 
Hanover 
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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Philipp Thomaschewski
FRATCH CEO
