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C Experts

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Hire experts who build embedded firmware, operating-system components and high-performance native software with C, POSIX APIs and hardware interfaces. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your technical needs.

Meet FRATCH Experts who have recently used C

Verified expert

Alwin G.

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IT Director

Essen
Alwin G.

Last position:

IT Interim Manager & AI Strategist

  • Founder of CheironX: AI-supported GRC management (ISO 27001, BSI IT-Grundschutz, TISAX, DORA)
  • Strategic focus on Agentic AI and GenAI for modern IT Governance, Risk & Compliance Management
  • IT interim management and strategic consulting
Verified expert

Rudolf E.

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Datacenter Engineer, Network & Security Administrator

Ratingen
Rudolf E.

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-departmental collaboration with other teams on operations and further development, and reporting.

  • Firewall vulnerability analysis.

  • Firewall access requests.

  • Troubleshooting IP communication issues on network and firewall infrastructure.

  • Security-critical IT infrastructure, processing of personal data, compliance with legal requirements.

  • Products: Palo Alto Networks Firewalls, Cisco ACI, Checkpoint Firewalls, F5

  • Technologies: SDN, SDWAN, Cisco EPIC, Cisco ACI

Verified expert

Peter V.

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IT Consultant

Weiterstadt
Peter V.

Last position:

IT Administrator at SEAT Deutschland

  • Creating concepts and architecture for domain integration (SEAT into the VW structure)
  • Domain trusts and administration
  • Operation and administration of Windows 2022/ 2025 servers and domains
  • Domain restructuring
  • GPO and SG editing and migration
  • DNS restructuring and migration

Technologies: Windows 2022, Active Directory, ADFS, AD Azure Connect, DHCP, DNS, GPO, VMWare vSphere, Hyper-V, Powershell, Jira, MS Office 365,), SCCM, VSAN Fileservices, Approximately 800 servers, 400 users

Verified expert

Peter F.

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Subproject Manager and Solution Architect - Microsoft 365 Transformation

Walpertskirchen
Peter F.

Last position:

Subproject Manager and Solution Architect - Microsoft 365 Transformation at Automotive Industry

  • Integrated highly regulated countries such as China and South Korea into a company-wide M365 tenant.

  • Technical point of contact for integrating specific requirements for the board and German subsidiaries subject to BaFin compliance requirements.

  • Subproject management.

  • Coordinated requirements as part of the overall architecture.

  • Designed the use of DLP features from Microsoft Purview.

  • Designed special access restrictions using Entra Id Conditional Access.

  • Supported the design of provisioning Teams teams and SharePoint sites with enhanced compliance requirements.

  • Provided technical support for implementing information classification with Sensitivity Labels for SharePoint Online and Teams.

  • Provided technical support to the subproject for introducing CoPilot for M365.

  • Skills: M365, Purview, DLP, Entra Id, Sensitivity Labels, CoPilot, Teams, SharePoint Online.

Verified expert

Michael S.

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IT & Test Consultant

Mainz
Michael S.

Last position:

IT & Test Consultant at Testing Experts GmbH

AI Readiness - Part 3: Creating an e-book on the use of AI in software testing

  • Designed and created an e-book on the sensible and safe use of AI in software testing from the perspective of an experienced test expert.
  • Used generative AI (ChatGPT, Perplexity Pro) as a sparring partner for structuring, wording suggestions and creating variations, with all content finally reviewed and approved using my own expertise.
  • Developed practical insights into the opportunities and risks of AI in testing, with a special focus on collaboration between testers and AI instead of “tester vs. AI”.
  • Title: “11 starke Gründe: Dream-Team statt Rivalen - Tester und KI sind gemeinsam unschlagbar”
  • Subtitle: “Wie Mensch und Maschine im Softwaretest das perfekte Team bilden – und warum reines KI-Testing riskant ist.”
  • Planned use of the e-book as a basis for workshops, customer meetings or internal training.
  • Technology: Generative AI, ChatGPT, Perplexity Pro, Microsoft Word, Adobe Acrobat, many years of hands-on professional testing experience, common sense.
Verified expert

Klaus K.

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HCL Lotus Notes / Domino & VMware IT Specialist

Bargfeld-Stegen
Klaus K.

Last position:

HCL Notes Banking Support, Domino Administration / Migration / Operations at Atruvia / HCL International

Description of duties “Atruvia / HCL International” Role: HCL Notes Banking Support, Domino Administration / Migration / Operations Operations, administration and technical support of the HCL Notes/Domino environment in the Atruvia banking environment on behalf of HCL. As part of an international support team, the focus was on second- and third-level support as well as the processing, management and monitoring of SLA tickets in categories 1, 2 and 3. Duties included the technical analysis and resolution of incidents in the Notes/Domino environment, system administration, and the development and modification of Lotus Notes /Domino applications and LotusScript agents when a programming solution was required. Another focus was ticket dispatching: analysing and assessing incoming tickets, assigning them to the responsible departments and specialist teams, and subsequently coordinating and tracking processing within the agreed SLA periods. There was also direct communication and coordination with subject-matter experts, departments and end customers of the connected banks. In particular, when language or technical communication problems arose within the international support team, German-language customer communication was handled and mediation between customers and technical specialists was provided. Objective Ensuring stable and reliable operation of the HCL Notes/Domino landscape in the Atruvia banking environment and the timely processing of business-critical support cases in line with the agreed Service Level Agreements. Incidents were to be analysed as early as possible and either resolved directly through administrative measures or suitable LotusScript/Notes solutions, or forwarded specifically to the responsible specialist teams. As of: 25.09.2026 (Version 2.10 LITE) including project times Page: 3 of 32 SPO-SOFT EDV Beratung, Dipl.-Ing. Klaus Kano, Tel.: +494532-2767682, Mail: [email], [link] At the same time, qualified preliminary analysis and targeted ticket dispatching were intended to ensure that every ticket reached the technically and professionally responsible department immediately and that unnecessary transfers, processing times and associated costs were reduced. Result Operational Notes/Domino support for the banks served was reliably ensured throughout the entire project period. SLA-relevant tickets were systematically analysed, prioritised, assigned to the responsible departments and tracked through to resolution. Some incidents were resolved directly through administration, technical error analysis and the development of suitable LotusScript agents and modifications to Notes/Domino applications. By directing tickets specifically to the relevant expert and specialist teams, incorrect assignments and unnecessary processing loops were reduced and compliance with the agreed SLA times was supported. Direct communication with the banks and mediation between German-speaking end customers and the international support team also contributed to efficient problem resolution and high customer satisfaction.

Verified expert

Niko S.

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Developing Architect / Solution Architect

Hamburg
Niko S.

Last position:

Developing Architect, Technical Lead "gridlytics" at HH Energienetze

  • Built a data integration platform for high-, medium- and low-voltage assets to enable contextual analysis of time series with master data from SCADA control systems (IEC 60870 104), INIS and SAP.
  • Responsible for the architecture and implementation of the solution, and acted as a sparring partner for the Product Owner.
  • Technologies used: Kotlin, Spring Boot, Maven, TimescaleDB, PostgreSQL, liquibase, Elements IoT, Docker, Kubernetes, Grafana, Python, jupyter and various API gateways.
Verified expert

Silvia B.

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Consultant

Überlingen
Silvia B.

Last position:

Business Consultant - Product Management Banking at Aareal Bank AG

  • Focus on optimizing and further developing the internal customer EBICS application
  • Functional and technical consulting for Aareal First Financial Solutions AG on EBICS standard products and applications in the areas of operations and further development, as well as project-related communication with external development partners and the product manufacturer to implement the corresponding technical optimizations
  • As the functional coordinator, providing advice on content-related and regulatory requirements as well as technical prerequisites and requirements, and bringing these together at the functional level
  • Consulting on the use of EBICS formats
  • Reviewing the current EBICS standard for optimization and further development potential
  • Analyzing the current state to identify development potential and deriving appropriate recommendations for action while considering regulatory requirements
  • Conducting EBICS tests throughout the project
  • Functional responsibility for requirements management and, in this context, recording and documenting requirements for such tests
  • Designing a functional and sustainable test management system
  • Conducting and evaluating tests
  • Consulting on sustainable quality assurance and audits
  • Project language: German and English
  • Tools/Methods: MS Project, MS Office, MS Visio, TestRail, Confluence, Jira, Business Logics Bankkrecher, Business Logics Test Data Generator, Business Logics Banking Tool, Business Logics Test System, DBEAVER, Squirrel, Unix Virtual Machines, WinSCP, Kitty, Putty, various Aareal Bank products, Online Banking Portal, Aareal Sign, core banking system, SAP Blue Eagle, SAP RE-FX, Aareon Wodis Sigma, Haufe Real Estate Wowinex, GAP Group Immotion, UTS Karthago, SAP IS-U/Waste, SIV kVASy, various EBICS clients
Verified expert

Yulia V.

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Transformation | TMO / PMO | Value Creation & Portfolio Management | Strategy Execution

Munich
Yulia V.

Last position:

Independent Advisor - Strategy, Transformation & AI at JV Advisory

Independent advisory practice for strategy, organisational transformation, M&A / investor work and AI/data-enabled change.

  • Short-term diagnostic and problem-solving mandates: rapid strategic and organisational assessments for leadership teams and Boards, translated into recommendations and transformation roadmaps.
  • Organisational redesign and AI governance for an international group of approximately 1,500 employees: structure, mandates, decision rights and interfaces; AI-readiness and data-maturity assessment; vendor evaluation and selection; capability building.
  • Design of a centralised Strategy Execution / Results Delivery Office for an industrial client: mandate, governance, portfolio steering, KPI logic, decision forums and implementation roadmap.
  • Selected part-time mandate with SPARS GmbH (as a Business Development and Investments Director): developed M&A pipelines, assessed targets for strategic fit and synergy potential, led commercial due-diligence workstreams and investor / partner engagement.
Verified expert

Vili D.

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Senior Data Engineer, Data Architect, Software Developer

Neuenhagen
Vili D.

Last position:

Technical Lead, Data Engineer at Mercedes-Benz Consulting

  • Optimized the data architecture (Medallion) to better decouple processing steps and improve transparency and reproducibility

  • Ensured the technical quality of data processing in Databricks by introducing schema enforcement, data quality checks, and a structured data architecture

  • Pipeline orchestration with Azure Data Factory

  • Improved and automated the development and deployment process by integrating Git and GitHub Actions

  • Technical leadership of the Data Engineering team (3 employees)

  • Led workshops to optimize and stabilize the data platform and development process

  • Collected and prioritized new requests and maintained the product backlog

  • Technologies: Microsoft Azure (Data Lake, Data Factory), Databricks, Apache Spark (PySpark), Python, SQL, Git, Confluence, Power BI, Power Apps, Dataverse, MS Sharepoint, Mural

Verified expert

Yusuf C.

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Senior Software Engineer C# | C++ | Java | JS | Microservices | Vert.x | OSGI | IoT | Hardware | MQTT

Würselen
Yusuf C.

Last position:

Senior Software Engineer at LeiKon GmbH

  • Development of scalable backend applications with C#/.NET and Java
  • Design and implementation of distributed microservice architectures
  • Development and integration of REST APIs for industrial applications
  • Development of modern web applications with React, Angular, and TypeScript
  • Implementation of MQTT-based communication solutions
  • Integration of industrial protocols such as OPC UA and Modbus TCP
  • Development of batch, process control, and HMI components
  • Containerization and deployment of applications with Docker
  • Conducting code reviews and supporting architecture decisions
  • Close collaboration with Product Owners, QA, and interdisciplinary teams
  • Analysis of business requirements and implementation of technical solutions
  • Further development of existing software architectures with a focus on maintainability and performance

Technologies: C#, .NET, ASP.NET Core, Java, C++, React, Angular, TypeScript, Vue.JS, MQTT, OPC UA, Modbus TCP, Docker, GitLab, MariaDB, MySQL, Linux

Verified expert

Robert K.

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Interim Manager | Group Manager in the IT Operations & Digitalization division „Databases, Operations & Support" (DOS)

Idstein
Robert K.

Last position:

Interim Manager | Group Manager in the IT Operations & Digitalization division „Databases, Operations & Support" (DOS) at Landwirtschaftliche RentenBank

  • Functional management and further development of a team of 28 IT employees (internal & external) in the areas of HelpDesk / HelpLine, RHEL (Red Hat), MUREX (trading system & applications), SAP basic operations
  • Management of external service providers (including FI-TS for SAP basic operations)
  • Personnel, resource and budget planning for the IT department and projects
  • Introduction and establishment of regular communication formats (regular meetings, team and cross-departmental meetings)
  • Ensuring application operations in a hybrid environment (Windows / Linux with database and web/application servers)
  • Support for transformation projects to modernize the application landscape (e.g. DevOps approaches)
  • Building and introducing digital IT procurement for hardware & software (e.g. with DELL)
  • Development and management of the „IT Operations DOS" department based on the company strategy
  • Preparation of management reports & decision papers on IT projects, optimization potential and automation opportunities
  • Representing the department in Rentenbank committees and ensuring regulatory compliance (BaFin §44, DSGVO, BSI, MaRisk)
Verified expert

Ornel Franck W.

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Purchasing Manager, Logistics, IT Manager & Software Architect

Frankfurt am Main
Ornel Franck W.

Last position:

Sales Partner at ERGO PRO

  • Industry: Insurance, Trade, IT
  • Customers & Projects: Consulting and selling insurance and similar services
  • Main tasks: Insurance consulting (health insurance, retirement planning, wealth building); commercial services, inside and field sales; sales data analysis and forecasting; customer consulting and support; opening a new sales headquarters for private and business customers; business development & innovation management; business use case development; process optimization; stakeholder management; team leadership and training; preparation and delivery of trainings;
  • Technologies used: Microsoft Office 365, Microsoft Teams, Jira, Draw.IO, Camunda 8, Java (8, 17,21,25), Git, Spring Boot, Spring Batch, Spring Data REST, Spring Web, Spring Security, J-Unit, Playwright, Lombock, Vaadin, H2, PostgreSQL (16, 17 18), pgAdmin, Docker, LLMs, JasperSoft Studio, JasperReports
Verified expert

Tobias M.

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Product Owner, Scrum Master, Project Manager

Oebisfelde-Weferlingen
Tobias M.

Last position:

Power BI Expert at MID-SIZED TRADING COMPANY FOR CLEANING TECHNOLOGY AND HYGIENE PRODUCTS

Reporting and controlling using Power BI for a production ERP system

  • Analysis of ERP data and interfaces for use in Power BI dashboards
  • Evaluation and migration of existing reports (e.g. Excel) to Power BI
  • Development of an authorization concept for selective data access
  • Documentation and training on the use and customization of Power BI dashboards

Label: Power BI, Excel, SelectLine ERP, Microsoft SQL, SQL Server Management Studio

Discover over 15,000 top freelancers

Statistics of experts using C

Aggregated from the professional profiles of matched freelancers.

Experience

21 years

C experts have 21 years of professional experience on average.

Position duration

3.1 years

C experts stay in a single position for 3.1 years on average.

Positions per freelancer

14

C experts have completed 14 positions on average over the course of their careers.

Top business areas

Information Technology, Product Development, Quality Assurance

C experts have gathered most of their hands-on project experience in Information Technology, Product Development, and Quality Assurance.

Top industries

Information Technology, Manufacturing, Automotive

C experts are most in demand in Information Technology, Manufacturing, and Automotive.

Certification focus areas

Information Technology, Product Development, Project Management

C experts earn their certifications most often in Information Technology, Product Development, and Project Management.

Bachelor's degree or higher

91%

91% of C experts hold at least a Bachelor's degree.

Master's degree or higher

66%

66% of C experts hold at least a Master's degree.

Doctorate

11%

11% of C experts have a doctorate (PhD).

Certifications per freelancer

3

C experts hold 3 professional certifications on average.

Most common languages

German, English, French

C experts most often speak German, English, and French.

Speak two or more languages

98%

98% of C experts speak two or more languages.

Based on our profile pool as of 5 Nov 2026.

Daily rate distribution

0% 25% 50% 75% 100%
6% of C experts charge less than €400 per day.
50% of C experts charge between €400 and €800 per day.
40% of C experts charge between €800 and €1200 per day.
4% of C experts charge between €1200 and €1600 per day.
1% of C experts charge €1600 or more per day.
<€400 €400-​800 €800-​1200 €1200-​1600 €1600+

The chart shows how the daily rates of experts in this technology 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 using C

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

800
600
400
200
Rate comparison chart
Daily rate avg. 749 €

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 760 €

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 5 Nov 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 (81%)
  • Manufacturing (55%)
  • Automotive (50%)
  • Banking and Finance (35%)
  • Education (35%)
  • Healthcare (33%)
  • Telecommunication (31%)
  • Professional Services (29%)

Please note that freelancers can work across multiple industries, so percentages overlap.

About the technology

Core language

C is a compiled, procedural language used where direct control over memory, processors and hardware matters. It supports operating-system components, embedded firmware, device drivers, networking software and native libraries. Its small runtime footprint makes it suitable for constrained devices and performance-sensitive services.

Where it runs

C powers microcontrollers, industrial controllers, automotive systems, telecom equipment and parts of desktop and server operating systems. It is also common in databases, language runtimes, graphics stacks and security-critical products. Companies choose it when predictable execution and close hardware access are more important than rapid abstraction.

Ecosystem and tooling

C specialists work with compilers such as GCC, Clang and vendor toolchains, along with Make, CMake and cross-compilation workflows. They use GDB, sanitizers, static analysis and profilers to find memory errors, undefined behavior, race conditions and bottlenecks. Common interfaces include POSIX, sockets, filesystems, interrupts and hardware registers.

Typical project work

  • Develop firmware for sensors, controllers and connected devices
  • Create device drivers, board support packages and boot components
  • Optimize networking, storage and real-time processing paths
  • Port native libraries across operating systems and processor architectures
  • Refactor legacy modules while preserving binary and hardware interfaces

When expertise matters

Companies bring in freelance C professionals when a release depends on hardware behavior, difficult debugging or strict resource limits. External expertise helps during board bring-up, platform migration, performance work, security reviews and legacy modernization. It is especially useful when internal teams need focused support without disrupting product delivery.

What strong specialists bring

Strong C professionals reason carefully about ownership, lifetimes, alignment, integer behavior and concurrency. They write tests for boundary conditions, document assumptions and use defensive interfaces instead of relying on undefined behavior. They also understand the target processor, build pipeline and deployment environment, and can explain trade-offs clearly to hardware, product and software teams.

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Frequently asked questions

Before you brief your next project: the most common questions about C.

C is used for firmware, device drivers, operating-system components, networking stacks and performance-sensitive native libraries. It is a strong choice when software must interact closely with hardware or run within strict memory and timing limits.

A strong C specialist chooses the language according to the system’s constraints and existing codebase. C offers a small runtime and broad toolchain support, while C++ provides richer abstractions and Rust adds stronger memory-safety guarantees; migration costs and hardware support often decide the practical option.

A capable C professional may also work with embedded debugging, electronics interfaces, RTOS environments, Linux internals, POSIX APIs, networking or build automation. The right combination depends on whether the project targets a microcontroller, operating system or native application.

The required depth depends on the risk and technical boundaries of the work. A small library change may need focused language expertise, while firmware, driver or concurrency work calls for proven skills in debugging, testing, toolchains and the target platform.

Much C work can be completed remotely when source code, build systems, logs and test hardware are accessible. On-site collaboration may help with board bring-up, lab equipment or restricted devices, while clear documentation and remote debugging support make distributed work practical.

Ask how the C professional handles memory ownership, undefined behavior, concurrency and failure paths. Review examples of tests, static analysis, debugging and performance work, then confirm that the specialist has used the compiler, processor and operating environment relevant to the project.

C remains practical for embedded products that need predictable resource use, mature vendor support and direct hardware access. Teams should weigh those benefits against maintenance needs and consider where C++ or Rust could reduce complexity or strengthen safety.

Maintainable C code has clear interfaces, explicit ownership rules, consistent error handling and tests around boundary conditions. Good professionals keep modules focused, document hardware assumptions and use compiler warnings, static analysis and sanitizers throughout the development process.

The average hourly rate of freelancers who have used C in their recent projects is 94 €, which corresponds to a daily rate of about 749 € based on an 8-hour working day.

Of the freelancers who have used C in their recent projects, 91% hold at least a Bachelor's degree, 66% hold at least a Master's degree, and 11% hold a doctorate.

On average, freelancers who have used C in their recent projects have 21 years of professional experience, with a single engagement typically lasting around 3.1 years.

The most common languages among freelancers who have used C in their recent projects are German (98%), English (97%), and French (23%).

The most common industries among freelancers who have used C in their recent projects are Information Technology (81%), Manufacturing (55%), and Automotive (50%).

The most common business areas among freelancers who have used C in their recent projects are Information Technology (92%), Product Development (87%), and Quality Assurance (66%).

Main locations of FRATCH Experts, who have recently used C

Our freelancers and interim experts are at home all over Germany — available on-site in Berlin, Hamburg, Munich and every major business hub, or fully remote. Choose a city to discover matched specialists, local market insights and up-to-date availability.

In Austria our freelancers and interim experts support companies from Vienna to Graz — on-site where your project needs them, or fully remote. Choose a city to discover matched specialists, local market insights and up-to-date availability.

Across Switzerland our specialists are active in Zurich, Geneva, Basel and Bern — working on-site or fully remote. Choose a city to discover matched specialists, local market insights and up-to-date availability.

Zurich Geneva Basel Bern

Countries:

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