Skip to main content
🇩🇪GDPR-compliant
Build reliable systems with

C Experts in Frankfurt

matched in minutes by AI

Hire 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

Verified expert

Ornel Franck W.

View profile

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

Minh D.

View profile

Project Manager / Business Analyst / Application Manager

Bad Vilbel
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

Verified expert

Torsten F.

View profile

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 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.

Verified expert

Maxime D.

View profile

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 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
Verified expert

Bardiya B.

View profile

Data Scientist & Machine Learning Engineer

Frankfurt am Main
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

Verified expert

Monika T.

View profile

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.

View profile

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 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.

Verified expert

Parthiban M.

View profile

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

Vladimir F.

View profile

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

Ralf K.

View profile

Senior Java Developer, Consultant

Frankfurt am Main
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
Verified expert

Johannes E.

View profile

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.

View profile

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.

View profile

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.

View profile

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

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)

C experts in Frankfurt have 23 years of professional experience on average. It is 2 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

14 (Germany: 13)

C experts in Frankfurt have completed 14 positions on average over the course of their careers. It is 1 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

86% (Germany: 90%)

86% of C experts in Frankfurt hold at least a Bachelor's degree. It is 4% lower than in Germany, where the rate stands at 90%.

Master's degree or higher

64% (Germany: 65%)

64% of C experts in Frankfurt hold at least a Master's degree. It is 1% lower than in Germany, where the rate stands at 65%.

Doctorate

7% (Germany: 11%)

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

Certifications per freelancer

5 (Germany: 2)

C experts in Frankfurt hold 5 professional certifications on average. It is 3 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 29 Oct 2026.

Daily rate distribution

0% 25% 50% 75% 100%
11% of C experts in Frankfurt charge less than €640 per day.
26% of C experts in Frankfurt charge between €640 and €800 per day.
26% of C experts in Frankfurt charge between €800 and €960 per day.
22% of C experts in Frankfurt charge between €960 and €1120 per day.
7% of C experts in Frankfurt charge between €1120 and €1280 per day.
4% of C experts in Frankfurt charge between €1280 and €1440 per day.
4% of C experts in Frankfurt charge €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 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.

1000
750
500
250
Rate comparison chart
Daily rate avg. 855 €
Germany avg. 752 €

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 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.

Published on:
FRATCH GPT

FRATCH GPT delivers freelancer proposals with clear reasoning and transparent pricing in minutes, helping your hiring department quickly and compliantly find the best talent.

Give it a try:

Try FRATCH GPT

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

Get in touch with the FRATCH team and we will get back to you within 4 hours.

Contact form

Would you rather directly get in touch?
We always have the time for a call or email!

FRATCH CEO avatar

Philipp Thomaschewski

FRATCH CEO

LinkedInFRATCH