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C Experts in Frankfurt

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Hire experts who design embedded software, optimize real-time code and maintain Linux-based systems in C. Get precise access to vetted, available freelancers whose skills match your technical requirements and project context.

Meet FRATCH Experts in Frankfurt, who have recently used C

Verified expert

Torsten F.

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Data Analyst, Requirements Manager

Dreieich
Torsten F.

Last position:

Data Analyst, Requirements Manager at Isabellenhütte Heusler GmbH

  • Analysis of the existing reporting platform including processes and governance topics with stakeholders from sales and marketing.

  • Detailed analysis and evaluation of client-defined requirements for existing reporting and new dashboards.

  • Supporting stakeholders in managing sales processes and early detection of KPI trends.

  • Use of Microsoft Power BI as central analysis and reporting platform.

  • Developing a proposal for the necessary evolution of processes and the Power BI platform.

  • Gathering current business processes and defining company-wide KPIs in coordination with stakeholders.

  • Analysis and inventory of the client's Power BI platform.

  • Analysis of processes and data governance.

  • Recording and documenting current business processes.

  • Developing recommendations for process and reporting platform improvements.

  • Designing and implementing dashboards in Power BI.

  • Defining company-wide KPIs and aligning them with stakeholders.

  • Microsoft Power BI.

  • Data analytics.

  • KPI definition and reporting.

  • Dashboard design and data visualization.

  • Stakeholder management and requirements management.

Verified expert

Maxime D.

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Lead Product Manager E-invoicing & AI

Frankfurt am Main
Maxime D.

Last position:

Lead Product Manager E-invoicing & AI at fino data services GmbH

  • Responsible for the concept, planning, and implementation of the product development of GetMyInvoices 2.0 and the subcomponent InvoiceRails
  • Independent work on all aspects of the project, including concept, specification in tickets, and coordination of developers
  • Creation, management, and prioritization of tickets to ensure all tasks are completed on time and with high quality
  • Carrying out and/or coordinating tests and ensuring the proper implementation of the developed features and functionalities
  • Close collaboration with developers to clarify technical requirements and ensure the implementations match the specifications
  • Regular reporting on project progress and documentation of key decisions, changes, and risks
  • Taking on the subject matter lead for all topics around e-invoicing and Peppol, especially in relation to the InvoiceRails component
  • Internal consulting and knowledge sharing on e-invoicing and Peppol for other teams and departments
  • Tracking market trends and new developments in e-invoicing and Peppol to continuously adapt the product strategy
  • Ensuring the long-term scalability and flexibility of the products for future technical and regulatory changes in the e-invoicing area
Verified expert

Monika T.

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Senior Technical Lead

Frankfurt am Main
Monika T.

Last position:

Senior ETL Lead at Takeda GmbH

  • Led design, development, and deployment of data solutions supporting a major pharma acquisition for Takeda Pharmaceutical Company, delivering transparency reporting systems across Azure,Databricks (Python and Shell Scripting) platforms.
  • Owned,Designed and developed scalable ELT pipelines to process Customer and Product data using Azure, complex SQL, Databricks, and shell scripting, enabling efficient data integration and processing across multiple sources including job orchestration and workflow automation.
  • Implemented performance optimization techniques (query tuning, parallelism, workload optimization), improving system efficiency and processing time.
  • Applied strong analytical and problem-solving skills to assess technical solutions and support business requirements for compliance and transparency reporting.
  • Designed scalable data foundations suitable for downstream analytics and AI workloads.
  • Led data quality initiatives by assessing multiple source data, defining quality metrics, and establishing processes for monitoring and continuous improvement.
Verified expert

Mustafa K.

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Senior Network Design and Engineer

Frankfurt
Mustafa K.

Last position:

Senior Network Design and Engineer at Helaba

  • Designed and specified the technical network integration of a new business-critical application system (MUREX) in the capital markets area in a complex interface and outsourcing environment.

  • Created component specifications, a catalog of measures and an implementation plan.

  • Ensured proper integration of the developed results in line with the bank’s framework: IT compliance, IT security, change and release management.

  • Selected and integrated a new service provider for the bank; moved critical bank applications to the provider.

  • Designed, implemented and supported the new Cisco network and Fortinet security setup at the service provider data center.

  • Acted as technical interface between the bank, service providers and consulting partners.

  • Supported and further developed the network and security infrastructure (clients, servers, networks); performed error analysis and implemented solutions within agreed service levels.

  • Analyzed and diagnosed all security and network failures, glitches and malfunctions.

  • Initiated continuous improvements to ensure efficient resource use and acceptable response times for users.

  • Provided network support in a financial services organization and prepared operational changes on production banking network infrastructure for both large and small projects within strict change management discipline.

  • Designed, defined, tested, governed and improved engineering standards.

  • Performed the role of network architect for medium to large projects involving team resources.

Verified expert

Parthiban M.

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Quality Assurance Engineer

Bad Homburg vor der Höhe
Parthiban M.

Last position:

Quality Assurance Engineer at Hanon Systems GmbH

  • Define the QA strategy and plan for the above mentioned OEMs project.

  • Identify applicable processes, methods, and standards to be followed (eg, GS_95014, KGAS, ISO/IEC 15504, ISO 26262, ISO 21434, etc.).

  • Plan reviews, audits, and assessments as per the strategy.

  • Check whether the project follows defined processes (System, software, mechanical, hardware, testing, change, configuration, problem, risk etc.) as per strategy.

  • Provide QA support to software process: software requirement analysis, software architectural design, software detailed design and unit construction, software unit verification, software component verification and integration verification, software verification processes.

  • Monitor compliance with organization-wide and project-specific standards.

  • Verify that deviations are documented and escalated.

  • Review work products (requirements, design docs, test cases, code, reports (MISRA, C0, C1, coding standards), etc.).

  • Check compliance with standards, templates, and checklists.

  • Ensure that bi-directional traceability exists (e.g., requirements ↔ design ↔ tests).

  • Give objective evidence (not influenced by delivery pressure) during assessments.

  • Identify non-conformances (process not followed, missing approvals, wrong standard).

  • Report deviations and track them until closure.

  • Verify that corrective actions are implemented (5why, Ishikawa, 8D, FMEA, FTA, DFM, DRP, PCC, LLBP, PDCA).

  • Provide QA status reports to management and project stakeholders.

  • Highlight risks related to process non-compliance.

  • Deliver objective evidence for assessments/audits (e.g., ASPICE, ISO/IEC 15504, ISO 26262, ISO 21434, ISO_PAS_8800).

  • Collect and analyze QA findings.

  • Suggest process improvements.

  • Support lessons learned activities.

  • Achieved ASPICE Level 1 and Level 2 for multiple Audi and Mercedes-Benz projects assessments.

Verified expert

Minh D.

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Project Manager / Business Analyst / Application Manager

Bad Vilbel
Minh D.

Last position:

Project Manager / Business Analyst / Application Manager at Finance and Insurance

  • Introducing 5 different process applications for various teams

  • Release planning: scope and time management

  • Resource/capacity planning

  • Conducting sprint planning / retrospectives

  • Increment planning (multiple sprints)

  • Preparing steering committee meetings / reporting to the executive board

  • Coordinating / aligning with external suppliers / deliveries

  • Multi-project resource planning

  • Aligning with the business unit and development team

  • Identifying best practices with IBM BAW

  • Cost control and planning for the project team and external service providers

  • Collecting KPIs using LogScale

  • Analyzing application errors with LogScale / queries

  • Defining user stories / aligning requirements with the business unit and development team

  • Testing and defect tracking

  • UI/UX design of the application

  • Preparing and facilitating brown-paper workshop

  • Test concept, test data, test organization, test execution

  • Recording team velocity / metrics

  • Executing tests

  • Scripts for automated testing

  • Organizing tests with the business unit and IT

  • Recording and prioritizing defects

  • Setting up and operating the application

  • Setting up application monitoring with LogScale dashboards

  • Checking health endpoints with PowerShell

  • Post mortem analysis

  • Setting up incident management

  • Setting up problem management

  • Analyzing errors using LogScale queries and dashboard

  • Pre-processing data for AI

  • Conducting evaluation with AI language models (Meta Llama 3.3 LLM and deepset Haystack) and RAG

  • Installing runtime environments for LLMs (large language model)

  • Evaluating various LLMs

  • Installing RAG (retrieval augmented generation) and integrating with LLM

  • Extracting unstructured data with LLM and RAG

  • Project based on IBM BAW (Business Automation Workflow), WebSphere Liberty, Domea, d.3, REST, LogScale (formerly Humio), Swagger, PowerShell, JIRA, Confluence, Lucom Interaction Platform (LIP), Mattermost, Jabber

Verified expert

Vladimir F.

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IT Consultant

Frankfurt am Main
Vladimir F.

Last position:

IT Consultant at ITZBund

  • ITSM consulting, analysis and optimization of IT capacity with BMC TSCO / BMC Helix
  • Drafting "Governance guidelines for operational capacity management"
Verified expert

Johannes E.

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Freelance Software Consultant

Dreieich
Johannes E.

Last position:

Freelance Software Consultant at S|R Software GmbH & Co. KG

  • Provided consulting for modernizing legacy applications
  • Delivered critical features under tight deadlines for backend and frontend
  • Technologies: C#, .NET, WPF, WCF, REST, Angular, MS SQL Server
Verified expert

Svyetoslav P.

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CTO

Frankfurt am Main
Svyetoslav P.

Last position:

CTO at Skar Audio

  • Main developer in an online retail company
  • Built an online shop using the Next.JS React framework
  • Integrated the site with dozens of third-party apps using REST and GraphQL APIs
  • Built a backend for order management, warehouse management (with iPhone app), and supply management
  • Automated invoicing and finances with QuickBooks
Verified expert

Ulm P.

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Freelance IT Specialist

Steinbach (Taunus)
Ulm P.

Last position:

DataStage ETL Expert at ING Bank

  • Datastage 11.7, dbt, Oracle 19, Python 3.12 / PySpark 3.5, Azure GitHub, Azure DevOps, Automic
  • Development of migration jobs to transfer data from the collection DWH to the new Risk Mart, as well as development of ETL pipelines to migrate historical data from the old Mart to the new Risk Mart.
  • Storage of the silver layer on Hadoop and the gold layer in Oracle.
  • Translation of DataStage jobs into dbt to publish reporting data in Google Cloud to a PostgreSQL database.
  • Creation and optimization of complex SQL queries for data extraction from a data vault, taking into account historical data in the point-in-time tables.
  • Creation of Oracle table definitions (DDL) and adjustment of existing stored procedures.
  • Versioning changes in GitHub and deployment via the CI/CD portal.
  • Refactoring long-running DataStage jobs into Python using PySpark to reduce server load.
  • Migration of SAS scripts to PL/SQL, including new development of distribution functions that have no direct equivalent in Oracle.
  • Development of Automic jobs to run DataStage pipelines and Python scripts (PySpark jobs) that control the population of the SME and institutional risk tables in the Risk Mart and perform business calculations.
  • Participation in the agile process, including creating user stories, estimations, and planning in Azure DevOps.
  • Handling Azure DevOps tickets and close collaboration with testers and business teams for error analysis and resolution.
Verified expert

Andreas I.

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Senior Cybersecurity Governance & ISMS Consultant

Frankfurt am Main
Andreas I.

Last position:

Cybersecurity Specialist Assessor at Bundesnetzagentur

  • Recognition of national notified bodies
  • Preparation of cybersecurity competency reports
  • EU Radio Equipment Directive
Verified expert

Sebastian N.

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Test Manager: MW/OS Interlocking System (Railway Interlocking Systems)

Hanau
Sebastian N.

Last position:

Test Manager: MW/OS Interlocking System (Railway Interlocking Systems) at Pintsch GmbH & Co. KG

  • Project for Deutsche Bahn
  • Analysis of the current project documents and enhancement of the test concept
  • Preparation of checklists for requirements analysis regarding testability and test case review
  • Preparation of onboarding documents for new team members
  • Participation in presentations and involvement in decisions regarding the hiring of new team members
  • Leading the test team with members in Romania, Spain and Germany
  • Allocation and supervision of test tasks for my team members
  • Definition of the documentation tool to be introduced in consultation with the project manager
  • Preparation of a concept for introducing automated tests, including the definition of the test tool
  • Hands-on test case creation, execution and reporting
  • Participation in management meetings at various levels and taking on tasks for the test team
  • Preparation of detailed documentation
  • Tools used: TestConductor, Testona (CTE), VectorCast, Parallel, Ubuntu, Visual Studio Code, Google Cloud, IBM ELM landscape, CENELEC, etc
Verified expert

Arne H.

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Managing Director

Frankfurt am Main
Arne H.

Last position:

Managing Director at HebRech GmbH & Co.KG

  • Restructuring the company in a challenging market environment while facing a decline in customers

  • Introducing clear processes, optimizing workflows, implementing financial guidelines and compliance from the corporate group

  • Setting up marketing automation for existing customers to curb customer loss

  • Building an active sales channel for additional services such as the telematics infrastructure

  • Establishing and launching an agile development process

  • Merging the Munich site (MUC Vorhammer GmbH) into HebRech GmbH & Co. KG to improve efficiencies

  • Developing and launching a cloud-based documentation software for midwives

Verified expert

Werner K.

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Test Coordinator, Designer and Engineer

Bad Homburg
Werner K.

Last position:

Test Coordinator, Designer and Engineer at IBM

  • Testing the SekIDP and related components
  • Test design, execution and automation, microservices, GitHub Enterprise, Eclipse, Katalon Test Platform, API Testing, Confluence 8, JIRA/Xray, Draw.io, Swagger/OpenAPI, Postman, Docker, Kubernetes, Podman, PuTTY, E-Health, Telematik, Gematik standards, EPA, E-Rezept, sektoraler IDP, encryption, XaDES, PaDES, DICOM, HL7, FHIR, IHE, ICD, SSO, SAML/Shibboleth, OAuth, smartcards, JWT, two factor authentication Android and iOS, Wireshark, BrowserStack, Cypress, gRPC, REST, SOAP, WS-Security, Linux Shell, PowerShell, SSH/SSL, Java, Kotlin, Cordova, Gradle, Groovy, Python, TypeScript

Discover over 15,000 top freelancers

Statistics of experts using C

Aggregated from the professional profiles of matched freelancers.

Experience

24 years (Germany: 21 years)

C experts in Frankfurt have 24 years of professional experience on average. It is 3 years more than in Germany, where the average stands at 21 years.

Position duration

3.1 years

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

Positions per freelancer

15 (Germany: 13)

C experts in Frankfurt have completed 15 positions on average over the course of their careers. It is 2 more than in Germany, where the average stands at 13.

Top business areas

Information Technology, Project Management, Product Development

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

Top industries

Information Technology, Banking and Finance, Telecommunication

C experts in Frankfurt are most in demand in Information Technology, Banking and Finance, and Telecommunication.

Certification focus areas

Information Technology, Project Management, Quality Assurance

C experts in Frankfurt earn their certifications most often in Information Technology, Project Management, and Quality Assurance.

Bachelor's degree or higher

85% (Germany: 90%)

85% of C experts in Frankfurt hold at least a Bachelor's degree. It is 5% lower than in Germany, where the rate stands at 90%.

Master's degree or higher

59% (Germany: 65%)

59% of C experts in Frankfurt hold at least a Master's degree. It is 6% lower than in Germany, where the rate stands at 65%.

Doctorate

4% (Germany: 11%)

4% of C experts in Frankfurt have a doctorate (PhD). It is 7% lower than in Germany, where the rate stands at 11%.

Certifications per freelancer

4 (Germany: 2)

C experts in Frankfurt hold 4 professional certifications on average. It is 2 more than in Germany, where the average stands at 2.

Most common languages

German, English, French

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

Speak two or more languages

97% (Germany: 98%)

97% of C experts in Frankfurt speak two or more languages. It is 1% lower than in Germany, where the rate stands at 98%.

Based on our profile pool as of 19 Sep 2026.

Daily rate distribution

0 2 4 6 8
2 of the C experts in Frankfurt charge less than €640 per day.
7 of the C experts in Frankfurt charge between €640 and €800 per day.
7 of the C experts in Frankfurt charge between €800 and €960 per day.
5 of the C experts in Frankfurt charge between €960 and €1120 per day.
2 of the C experts in Frankfurt charge between €1120 and €1280 per day.
One of the C experts in Frankfurt charges between €1280 and €1440 per day.
One of the C experts in Frankfurt charges €1440 or more per day.
<€640 €640-​800 €800-​960 €960-​1120 €1120-​1280 €1280-​1440 €1440+

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

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

1000
750
500
250
Rate comparison chart
Daily rate avg. 854 €
Germany avg. 753 €

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

1000
750
500
250
Rate comparison chart
Median rate 800 €
Germany median 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 19 Sep 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 (87%)
  • Banking and Finance (68%)
  • Telecommunication (58%)
  • Transportation (42%)
  • Professional Services (42%)
  • Government and Administration (39%)
  • Automotive (35%)
  • Insurance (32%)

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

About the technology

Core language

C is a compiled, procedural programming language built around direct memory access, predictable execution and close control of hardware resources. It is used for operating-system components, embedded firmware, device drivers, networking software and performance-sensitive libraries. The language’s small runtime footprint makes it suitable where reliability and resource use matter.

Systems and products

C specialists work across products that must remain stable under strict technical constraints. Typical assignments include:

  • Embedded firmware for sensors, controllers and industrial equipment
  • Linux utilities, device drivers and system services
  • Networking, telecommunications and storage components
  • Safety-critical or real-time software with defined timing requirements
  • Native libraries used by applications in other languages

Ecosystem and tooling

Professional C work often includes GCC or Clang, Make, CMake and cross-compilation toolchains. Specialists use debuggers such as GDB, static analysis, sanitizers and automated test frameworks to find memory errors, undefined behavior and concurrency defects. Common environments include Linux, Unix-like systems, RTOS platforms and microcontroller toolchains.

When to bring in expertise

Companies bring in freelance C experts when a product needs hardware integration, a legacy codebase needs controlled modernization or a performance bottleneck reaches the system boundary. In Frankfurt, projects may involve industrial technology, mobility, telecommunications, finance infrastructure or research equipment. Remote collaboration works well when repositories, hardware access and test procedures are organized; on-site work can help with lab equipment and hardware bring-up.

Skills that matter

Strong professionals understand pointers, memory ownership, data representation, compilation and linking rather than relying only on syntax. They can read hardware documentation, reason about interrupts and concurrency, and design interfaces that remain stable over time. Useful adjacent skills include C++, Python, shell scripting, Linux, version control, CI pipelines, electronics and a relevant RTOS.

How quality is judged

A capable C specialist explains trade-offs in terms of safety, timing, memory and maintainability. They use clear interfaces, defensive error handling and reproducible builds, while documenting assumptions about hardware and platforms. Look for evidence of code reviews, automated tests, debugging with real tools and careful handling of portability, standards compliance and long-lived releases.

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Frequently asked questions

The facts hiring teams ask for most often when it comes to C.

C is commonly used for operating-system components, embedded firmware, device drivers, networking stacks and native libraries. It is a strong fit when software needs predictable performance, direct hardware access or a small runtime footprint.

C offers a smaller language surface and direct control with little runtime overhead. C++ adds abstraction and object-oriented features, while Rust provides stronger compile-time memory-safety guarantees; the right choice depends on platform constraints, existing code and team capability.

A strong C freelancer often works with Linux, shell scripting, Git, CMake, GCC or Clang and GDB. Embedded assignments may also require an RTOS, microcontroller toolchains, electronics knowledge or communication protocols such as CAN, UART and TCP/IP.

For C work, clarify the target processor, operating system or RTOS, toolchain, hardware access and required interfaces. Also describe timing, memory, safety, compliance, testing and maintenance expectations so the specialist can assess the codebase and delivery risk accurately.

C projects can often be handled remotely when source code, build environments, logs and test access are available. On-site collaboration in Frankfurt is more useful for hardware bring-up, laboratory testing or work involving equipment that cannot be accessed securely from elsewhere.

The needed background for C depends on the system’s risk and complexity, not only on the language. A small utility may need focused implementation skills, while firmware, drivers or real-time components call for proven debugging, concurrency, hardware and release experience.

Review how a C specialist handles ownership, bounds checks, error paths, concurrency and undefined behavior. Ask for examples of testing, static analysis, reproducible builds and debugging, and assess whether the person can explain technical trade-offs in clear terms.

ANSI C is a commonly used name for standardized C, while current work may target a particular ISO C version and compiler implementation. A freelancer should identify the required language standard, compiler extensions, portability targets and build rules before changing or extending the code.

The average hourly rate of freelancers in Frankfurt, Germany who have used C in their recent projects is 107 €, which corresponds to a daily rate of about 854 € based on an 8-hour working day.

Of the freelancers in Frankfurt, Germany who have used C in their recent projects, 85% hold at least a Bachelor's degree, 59% hold at least a Master's degree, and 4% hold a doctorate.

On average, freelancers in Frankfurt, Germany who have used C in their recent projects have 24 years of professional experience, with a single engagement typically lasting around 3.1 years.

The most common languages among freelancers in Frankfurt, Germany who have used C in their recent projects are German (100%), English (97%), and French (32%).

The most common industries among freelancers in Frankfurt, Germany who have used C in their recent projects are Information Technology (87%), Banking and Finance (68%), and Telecommunication (58%).

The most common business areas among freelancers in Frankfurt, Germany who have used C in their recent projects are Information Technology (100%), Project Management (81%), and Product Development (74%).

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.

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