
C Experts in Frankfurt
matched in minutes by AIHire experts who design embedded software, operating-system components and high-performance libraries in C. Work with specialists experienced in memory management, POSIX interfaces and cross-compilation, matched precisely with vetted, available freelancers.
Meet FRATCH Experts in Frankfurt, who have recently used C
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
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
Minh D.
Last position:
Project Manager / Business Analyst / Application Manager at Finance and Insurance
Introduction of 5 different process applications for different teams
Release planning: scope and time management
Resource/capacity planning
Conducting Sprint Planning / retrospectives
Increment planning (several sprints)
Preparation of Steering Committee meetings / reporting to the Board
Coordination / alignment with external suppliers / deliveries
Resource planning for multiple projects
Coordination with business department and development team
Identification of best practices with IBM BAW
Cost control and planning for the project team and external service providers
Collection of KPIs using LogScale
Analysis of application errors with LogScale / Queries
User Story definitions / coordination of requirements with the business department and development team
Testing and defect tracking
UI/UX design of applications
Preparation and moderation of Brown-Paper workshops
Test concept, test data, test organization, test execution
Collection of team velocity / metrics
Test execution
Script for automated testing
Test organization with business department and IT
Recording and prioritization of defects
Establishment and operation of the application
Establishment of application monitoring with LogScale Dashboards
Checking health endpoints with PowerShell
Post Mortem analysis
Establishment of Incident Management
Establishment of Problem Management
Analysis of errors using LogScale Queries and Dashboard
Pre-processing of data for AI
Evaluation using AI language models (Meta Llama 3.3 LLM and deepset Haystack) and RAG
Installation of runtime environments for LLMs (Large Language Model)
Evaluation of various LLMs
Installation of RAG (Retrieval Augmented Generation) and integration with LLM
Extraction of 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
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 customer-defined requirements for existing reporting and new dashboards to be established.
Support for stakeholders in managing sales processes and identifying KPI trends at an early stage.
Use of Microsoft Power BI as the central analysis and reporting platform.
Development of a proposal for the required further development of processes and the Power BI platform.
Documentation of AS-IS business processes and derivation of company-wide KPIs, including coordination with stakeholders.
Analysis and assessment of the customer's Power BI platform.
Analysis of processes and data governance.
Documentation of AS-IS business processes.
Development of recommendations for further developing processes and the reporting platform.
Design and implementation of dashboards in Power BI.
Development of company-wide KPIs and coordination with stakeholders.
Microsoft Power BI.
Data analytics.
KPI definition and reporting.
Dashboard design and data visualization.
Stakeholder management and requirements management.
Maxime D.
Last position:
Lead Product Manager E-invoicing & AI at fino data services GmbH
- Responsible for the concept, planning, and delivery of product development for GetMyInvoices 2.0 and its subcomponent InvoiceRails
- Independently handled all aspects of the project, including concept development, writing ticket specifications, and coordinating developers
- Created, managed, and prioritized tickets to ensure all tasks were completed on time and to a high standard
- Conducted and/or coordinated tests and ensured the proper implementation of developed features and functionality
- Worked closely with developers to clarify technical requirements and ensure implementations met specifications
- Regularly reported on project progress and documented key decisions, changes, and risks
- Took the lead on all topics related to e-invoicing and Peppol, especially regarding the InvoiceRails component
- Provided internal guidance and shared knowledge about e-invoicing and Peppol with other teams and departments
- Tracked market trends and new developments in e-invoicing and Peppol to continuously adapt the product strategy
- Ensured the products’ long-term scalability and adaptability to future technological and legal changes in e-invoicing
Bardiya B.
Last position:
Data Scientist at Rewe Digital GmbH
Statistical Forecasting Algorithm
- Improvement of an statistical probabilistic forecasting algorithm for sales + evaluation
- Migration from R/On-premise to Python/Snowflake
- Productionalization on Snowflake in cooperation with data engineers & DevOps
Monitoring Dashboard
- Data engineering for preparation & provisioning of necessary data/resources on Snowflake
- Development & deployment of a Streamlit dashboard in Snowflake
ML-based Probabilistic Forecasting on Vertex AI
- Development of a ML-based probabilistic forecasting algorithm from scratch
- Implementation of MLOps pipeline in Kubeflow on Google Cloud Vertex AI
Tech Stack: Python, Snowflake/Snowpark, R, Streamlit, Gitlab/Gitlab CICD, Terraform, Google Cloud, Vertex AI (aiplatform SDK, gcloud CLI, feature store, model registry, etc), kubeflow
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.
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 market area in a complex interface and outsourcing environment.
Created component specifications, catalog of measures and implementation plan.
Ensured proper integration of developed results in accordance 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 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 enhancements to guarantee efficient resource utilization and acceptable response times to users.
Provided network support in financial service organization and operational change preparation 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 role of network architect for medium-large projects involving team resources.
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.
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"
Ralf K.
Last position:
Senior Java Developer, Consultant at Dataport AÖR
- Maintenance and further development of the Java/Swing-based @rtus FormsEditor
- Design and development of a graphical formula editor based on Google Blockly for representing a project-specific DSL, including parsing and code generation
- Implementation of character-accurate synchronization between the editor and print preview to improve the user experience
- Technologies: Java 17/21, Swing, JavaFX, JBoss/Wildfly, JUnit, Mockito, Blockly, JPedal, ICEPDF, Eclipse
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
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
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.
Andreas I.
Last position:
Cybersecurity Specialist Assessor at Bundesnetzagentur
- Recognition of national notified bodies
- Preparation of cybersecurity competency reports
- EU Radio Equipment Directive
Discover over 15,000 top freelancers
Statistics of experts using C
Aggregated from the professional profiles of matched freelancers.
Experience
23 years (Germany: 21 years)

Position duration
3.1 years

Positions per freelancer
14 (Germany: 13)

Top business areas
Information Technology, Project Management, Product Development

Top industries
Information Technology, Banking and Finance, Telecommunication

Certification focus areas
Information Technology, Project Management, Quality Assurance
Bachelor's degree or higher
86% (Germany: 90%)
Master's degree or higher
64% (Germany: 65%)
Doctorate
7% (Germany: 11%)

Certifications per freelancer
5 (Germany: 2)

Most common languages
German, English, French

Speak two or more languages
97% (Germany: 98%)
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 Frankfurt 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 Frankfurt 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 (88%)
- Banking and Finance (66%)
- Telecommunication (56%)
- Professional Services (44%)
- Transportation (41%)
- Automotive (34%)
- Government and Administration (34%)
- Retail (34%)
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, hardware and execution matters. It powers embedded firmware, operating-system components, device drivers, networking software and performance-critical libraries. Its small runtime footprint makes it suitable for constrained devices as well as dependable server infrastructure.
Systems it builds
C specialists work across products that must remain fast, predictable and close to the hardware.
- Embedded firmware for industrial equipment, vehicles and medical devices
- Linux and POSIX system utilities, services and device drivers
- Networking stacks, communication protocols and security components
- Native libraries, databases and real-time processing software
In Frankfurt, this expertise can support industrial, automotive, telecommunications and finance-related technology teams, with remote or on-site collaboration depending on hardware and testing needs.
Ecosystem and tooling
A C professional may work with GCC, Clang, Make, CMake, GDB and Git, alongside cross-compilers and vendor toolchains. Common environments include Linux, Windows, Unix-like systems, RTOS products and bare-metal targets. Practical work often involves POSIX APIs, sockets, threads, serial interfaces and hardware abstraction layers.
When expertise matters
Companies bring in freelance C specialists when a product needs reliable low-level changes without disrupting established code. Typical signals include memory leaks, race conditions, unstable firmware, difficult builds or a need to port software to a new processor or operating system.
- Diagnose crashes, leaks and undefined behavior
- Refactor legacy modules while preserving binary interfaces
- Create tests for hardware-facing and concurrent code
- Improve build, release and cross-compilation workflows
What strong specialists deliver
Strong C professionals reason carefully about ownership, lifetimes, buffers, pointers and error paths. They use sanitizers, static analysis, debuggers and targeted tests to make defects visible. They also document interfaces clearly and separate hardware-specific code from portable logic.
Quality includes more than code that compiles. Look for experience with the target operating system, processor, compiler and deployment constraints, plus a disciplined approach to reviews, reproducible builds and long-term maintenance.
Working with C freelancers
A clear brief should name the target hardware or operating system, compiler toolchain, interfaces, safety or security constraints and expected deliverables. Access to hardware, logs, build instructions and test data makes remote work practical; device bring-up and lab validation may call for on-site sessions in Frankfurt.
Freelancers often contribute alongside C++, Rust, Python or electronics specialists. The best collaboration defines ownership of interfaces early and agrees how changes will be tested across simulated and physical environments.
Frequently asked questions
The facts hiring teams ask for most often when it comes to C.
C is used for embedded firmware, operating-system components, device drivers, networking stacks and native libraries. It is a strong choice when predictable performance, small binaries and direct hardware access matter.
C offers a compact language model and broad support across processors, operating systems and toolchains. C++ adds abstraction and object-oriented features, while Rust provides stronger compile-time memory-safety guarantees; the right choice depends on existing code, target constraints and team skills.
A strong C specialist may also work with Linux, POSIX, Git, CMake, Make, GCC or Clang. Embedded projects often require knowledge of microcontrollers, RTOS products, serial protocols, hardware debugging and electronics interfaces.
The need depends on the system’s risk, hardware access and codebase condition. C work involving firmware, concurrency, safety or security benefits from a specialist who has handled the same target environment and can show disciplined testing and debugging practices.
C projects can often be handled remotely when the repository, toolchain, logs and test environment are accessible. On-site work in Frankfurt becomes more useful for hardware bring-up, lab testing, device access or close collaboration with production and electronics teams.
A good C brief identifies the processor or operating system, compiler, build system, interfaces, quality constraints and expected deliverables. It should also explain how software is tested, released and deployed so the specialist can assess the work accurately.
Review how C code handles ownership, bounds, lifetimes, errors, concurrency and resource cleanup. Look for clear interfaces, static-analysis results, useful tests, reproducible builds and evidence that the specialist can diagnose failures rather than only implement features.
C freelancers commonly handle firmware changes, driver development, portability work, performance investigations and legacy-code modernization. They may also improve build systems, add automated tests, integrate protocols or investigate crashes in deployed products.
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 855 € based on an 8-hour working day.
Of the freelancers in Frankfurt, Germany who have used C in their recent projects, 86% hold at least a Bachelor's degree, 64% hold at least a Master's degree, and 7% hold a doctorate.
On average, freelancers in Frankfurt, Germany who have used C in their recent projects have 23 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 (34%).
The most common industries among freelancers in Frankfurt, Germany who have used C in their recent projects are Information Technology (88%), Banking and Finance (66%), and Telecommunication (56%).
The most common business areas among freelancers in Frankfurt, Germany who have used C in their recent projects are Information Technology (100%), Project Management (78%), and Product Development (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.
Request a free demo
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Berlin
Hamburg
Munich
Cologne
Stuttgart
Dusseldorf
Leipzig
Dortmund
Essen
Bremen
Nuremberg