Modbus Experts in Germany
for reliable industrial systems, matched in minutes with vetted freelancersHire experts who connect PLCs, sensors and supervisory systems through Modbus RTU and Modbus TCP, while handling gateways, register maps and commissioning. Get fast, precise access to vetted and available freelancers matched to your project.
Meet FRATCH Experts in Germany, who have recently used Modbus
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
Jens R.
Last position:
Platform Architect & Senior Developer at Direct client, industrial measurement technology, medium-sized company
- Technical leadership across hardware, firmware, and software teams; scope: hardware/firmware team (4 people) and leadership group (5 people)
- Consolidated and documented a product family that had grown over more than 15 years and aligned it with CRA compliance — from the bare-metal I/O module to the cloud interface.
- Provided the most important customer product with the essential requirements and architecture documentation within two months — for a firmware landscape that had grown over more than 15 years. It now supports the customer’s modernization strategy.
- Established a monthly reporting line to the supervisory board and executive board within three months: nine meetings since 12/2025. The report itself is versioned and built from the CI pipeline; it is based on automatically collected activity and release data instead of assessments.
- Built a container-based CI/CD infrastructure from scratch: cross-compilation, host tests, and documentation builds in one continuous pipeline.
- Introduced declarative QA gates for DevOps and development artifacts — from the start using lefthook instead of pre-commit, executed in a dedicated container image.
Technologies used: arc42, req42, tpo42, docToolchain, PlantUML, ArchiMate, C4 model, ADR, C, C++ (GTest), CMake, Bare Metal (ARM Cortex-M3/M7), OCI containers, Jenkins, lefthook, Prometheus, Grafana, SBOM, CRA, OPC, SCADA, PLC integration, IPv6 migration, Zero Trust, Sociocracy 3.0, Cynefin
Ljubomir O.
Last position:
Senior Software Test Engineer at Keil KTM GmbH
Temporary employment
- System black-box integration tests (BBIT, IVVQ): Execution of regression, release, confirmation and conformity tests for safety-critical braking control units in the railway industry
- Software Test Application & Integration: Runtime configuration of software components and libraries, validation of interfaces, configuration dependencies and component interactions
- Test Automation (FEAT Framework): Co-development and further development of an automated test framework for test execution, reporting and result analysis
- Functional Safety (SiL4, FuSi): Ensuring compliance with safety requirements, traceability and coverage as well as conformity with EN50126/28/29
- Test Automation for Communication Components: Configuration and validation of fieldbus (CAN) and Ethernet-based TCMS data communication interfaces (TRDP and CIP)
- Requirements Analysis & Shift-Left (PTC Windchill ALM): Analysis of software and system artifacts to identify gaps, ambiguities and redundancies early in the SDLC
- Test Design & Test Case Development: Derivation of test conditions and coverage strategies and implementation of data-driven test cases (DDT) including reusable test data fixtures
- CI/CD & Automation (Python, PowerShell, Jenkins, SVN): Automation of build, test and HIL deployment processes as well as integration into CI/CD pipelines
- Test Data & Configuration Management (XML): Maintenance and adjustment of XML test vectors and system configurations with automated integration into test environments
- Non-Functional Testing: Execution of performance and load tests to assess stability and system behavior
- Agile Development & Defect Management (JIRA, Confluence): Work in Scrum teams, test coordination, review of test artifacts as well as defect tracking and root-cause analysis
- Error Analysis & Debugging (CANoe, CANalyzer): Analysis of errors and message flows across multiple system levels (application to bus)
- Model-Based Analysis (UML, Enterprise Architect): Specification of SUT/SOW and support for systematic test control
- Process & Test Documentation: Creation of integration and test documentation according to internal quality and certification requirements
Emil O.
Last position:
Automation Engineer In House at Prevas AB
Working as an Automation Engineer in Prevas' in-house engineering team. My primary assignment involves developing and expanding ABB 800xA SCADA systems for a large-scale data center project. Responsibilities include SCADA graphic design, alarm management, system integration using OPC UA and Modbus, testing, verification, documentation, and commissioning support. In addition, I contribute to PLC and HMI development projects using Siemens, Rockwell, and ABB platforms and provide 24/7 remote support for industrial customers.
- ABB 800xA & ControlBuilder/ AC800M
- Rockwell Studio 5000 Logix Designer
- Siemens TIA Portal
- ABB 800xA
- Remote Support
- Troubleshooting hardware/software
Giuseppe A.
Last position:
Embedded Software Development at Inheco
- AI Integration (LLM & RAG): Designed and built an internal intelligent RAG system (Retrieval-Augmented Generation) based on LLMs, n8n, and vector data to automatically analyze technical documents and error logs.
- Design & Implementation: Designed a robust RS-232/UART communication interface for an SBC-based embedded device used to control medical shaker systems.
- Architecture & Protocol Design: Built a highly maintainable software structure (OOP, SOLID) and defined resilient, hardware-level communication protocols, including multithreading and advanced error handling.
- Quality Assurance & DevOps: Automated testing with xUnit, ran integration tests directly on the hardware target, and maintained technical documentation to strict medical technology standards via Azure DevOps.
Label: C#, .NET, LLMs, RAG, n8n, RS-232, UART, Multithreading, async/await, xUnit, gRPC/protobuf, Blazor, MudBlazor, EF Core, Visual Studio 2026, Azure DevOps
Olfa A.
Last position:
Senior Embedded Software Engineer / Function Developer at Enginius GmbH (FAUN GROUP)
- Developed model-based software for hydrogen tank control units using MATLAB/Simulink, aligned with ISO 26262 functional safety requirements
- Performed system integration and software verification across MIL and HIL environments using dSPACE and Vector tools
- Defined software architecture (SADS) with interface specifications for CAN, analog, and digital communication protocols
- Generated production-ready embedded C code using Simulink Embedded Coder; created and maintained A2L calibration files with CANape
- Designed and executed MIL/HIL test cases ensuring full coverage of functional and safety requirements
- Implemented CODESYS PLC applications on IFM ecomatController; applied CAN and Modbus TCP/IP communication protocols
- Contributed to HMI/UI development using Qt/C++ on Linux (Qt Creator)
- Applied agile Kanban workflow with Git-based version control (Bitbucket)
Tools: MATLAB, Simulink, CANape, CANalyzer, PCAN-View, Embedded Coder, CODESYS, TTC2038/PXROS, Codebeamer, Jira, Git
Jens-Uwe P.
Last position:
Architecture and programming for an automotive test bench platform at Automotive supplier
In this project, I was responsible for designing and implementing a new, modular, and highly scalable test bench platform for an automotive supplier. My focus was on developing a robust system architecture and programming the associated software, with UML modeling used consistently throughout. This structured approach significantly increased the reusability of individual LabVIEW test modules and sustainably reduced development time for subsequent projects. I also integrated modern automotive standards such as CAN FD, LIN, and safety requirements, making the solution future-proof.
Technologies: LabVIEW, Visio, UML, CAN FD, LIN, DMM, Safety, Image processing, Project management, HMI, C#, C++, Python, Rust, CI
Youness R.
Last position:
Communication modernization and recipe management between S7-300, S7-1500 and WinCC V7 at Siemens AG
- Consulting and development of suitable communication concepts between S7-300 and S7-1500, taking the existing PROFIBUS infrastructure into account
- Technical support for connecting the S7-300 controllers to the existing recipe data block of the S7-1500
- Assisting in the development of the communication sequence for recipe access (read, write, acknowledge, status handling)
- Configuration of S7 communication (PUT/GET)
- Creation and adaptation of WinCC V7 scripts (C scripts and VBS scripts) for WinCC-based recipe management
- Development, optimization, and integration of recipe processes into the existing WinCC project structure
- Commissioning of the new communication interfaces and recommissioning of the recipe logic on existing systems
- Creation of technical documents: communication sequences, functional descriptions, commissioning documentation
Stefan K.
Last position:
C# .NET/WPF Developer at Hessische Zentrale für Datenverarbeitung
- Redevelopment of outdated software used in Hessian schools in C# .NET/WPF
- Understanding and analysis of old Delphi and Visual Basic 6 source code
- Use of Visual Studio 2022 as IDE
- Team collaboration through pull requests and version control with Git/SourceTree
- Project management with proprietary wiki software and Open Project
- TechStack: C#, .NET 8.0, WPF, Visual Studio 22, Delphi, Visual Basic 6, LDAP, Active Directory, FTP, SMB, Git, SourceTree
- Workflow: pull requests, Open Project, weeklies, weekly meetings, dynamic communication
Rachid R.
Last position:
Self-employed at R&A Engineering GmbH
- Development and programming of PLC controls and servo drives, such as TIA-Portal, Siemens Step7 Classic, RSlogix/Studio5000, Unity Pro and CODESYS
- Visualization systems WinCC, FactoryTalk VIEW
- Integration of various fieldbuses into automation devices (PROFIBUS, PROFINET, DeviceNet, ControlNet, Ethernet/IP, MODBUS)
- Programming of scripts (C# / VB.Net / VBscript / VBA)
- Selection of electrical components and systems
- Commissioning and optimization of simple to complex systems and machines
- Planning and creation of electrical schematics
- Preparation of installation plans
- Preparation of bills of materials and technical calculations
- Feasibility studies
Steffen K.
Last position:
Freelancer – Software Development at LightnTec GmbH
- Implementation of an RGBW function on a microcontroller to control flexible LED matrix displays in Embedded C
- Implementation of various algorithms for calculating a white channel
- Extension of a web interface
Andreas W.
Last position:
Self-employed Software Developer at amw-software.net
Valentin R.
Last position:
Freelance Hardware Development Engineer at Swarm Biotactics
PCB design with Altium, MCU Programming, Prototyping
Goran P.
Last position:
Test Manager & Analyst at Festo / Questax GmbH
Project goal: Carrying out system tests and validating industrial communication and control systems, including requirements definition and verification.
Responsibilities:
- Test planning, test execution
- Test strategy, test cases, and test specifications
- Requirements analysis
- Ensuring traceability between requirements, test cases, and defects
- Carrying out regression and integration tests
- Defect analysis
- Simulation and validation
- NetSniffer Wireshark
- Supporting test automation (Python, CI/CD)
- Reporting
- Stakeholder coordination and agile collaboration (Scrum / SAFe / Kanban)
- V-Model
- CI/CD automation with Python, Groovy, and frameworks (Selenium, PyTest)
Technologies:: CAN, Modbus, Ethernet, PLC, PROFINET, Codebeamer ALM, Scrum, SAFe, MS Teams, Git, CI/CD with GitLab CI and TeamCity, Windows Batch, FAS, Wireshark, Python, Enterprise Architect (EA), AI tools (e.g. ChatGPT, Microsoft Copilot), VS Code, Tia Portal, SCL, Python (Selenium, PyTest)
Philipp G.
Last position:
Agile Coach / Scrum Master at Via PROCEED!NOW – Customer: Die Lobby GmbH
- Introduction and anchoring of agile methods and mindsets in an interdisciplinary development team
- Coaching and training agile practices (Scrum, Kanban) in the context of a complex, data-based product
- Supporting and mentoring the product owner in prioritization, backlog maintenance and stakeholder communication
- Sparring partner for the product team in the further development of the product vision and strategy
- Supporting the conversion or new development of a provisioning and sales management tool
- Integration and coordination of the SAP, TYPO3 (PIM) and individual microservices systems in the backend
Discover over 15,000 top freelancers
Statistics of experts using Modbus
Aggregated from the professional profiles of matched freelancers.
Experience
18 years
Position duration
2.4 years
Positions per freelancer
10
Top business areas
Product Development, Information Technology, Quality Assurance
Top industries
Manufacturing, Information Technology, Automotive
Certification focus areas
Information Technology, Quality Assurance, Operations
Bachelor's degree or higher
83%
Master's degree or higher
56%
Doctorate
11%
Certifications per freelancer
3
Most common languages
English, German, French
Speak two or more languages
100%
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 Germany 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 Germany using Modbus
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.
Modbus experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Manufacturing (86%)
- Information Technology (70%)
- Automotive (51%)
- Energy (37%)
- Healthcare (35%)
- Education (33%)
- Telecommunication (26%)
- Transportation (21%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Industrial communication basics
Modbus is an open communication protocol for exchanging data between control equipment, sensors, meters and supervisory systems. It uses a straightforward request-and-response model, making process values, statuses and commands accessible across industrial networks. Common implementations include Modbus RTU over serial lines and Modbus TCP over Ethernet.
Where Modbus runs
Modbus appears in production plants, building automation, energy systems, water treatment and machine control. Companies use it to connect equipment from different manufacturers when they need dependable access to registers and coils.
- Read values from sensors, meters and drives
- Exchange commands with PLCs and remote I/O
- Integrate legacy serial equipment with modern networks
- Feed plant data into SCADA, HMI or monitoring systems
Protocol variants and tools
Strong specialists understand addressing, function codes, data types, byte order and exception handling. They work with Modbus RTU, Modbus ASCII and Modbus TCP, plus serial converters, Ethernet gateways, PLC environments, SCADA suites and protocol analysis tools. Modicon’s original Modbus terminology still appears in many technical documents.
When companies need specialists
Freelance expertise is useful when a new machine must communicate with an existing line, a gateway behaves inconsistently or register documentation is incomplete. Projects often involve commissioning at a site in Germany, remote diagnosis, or coordination between equipment suppliers and internal operations teams.
- Map registers and validate device data
- Diagnose timeouts, framing errors and address conflicts
- Configure gateways between serial and Ethernet networks
- Document interfaces for maintenance teams
What good work delivers
Reliable Modbus work starts with clear device documentation and controlled testing. A capable professional verifies electrical interfaces, termination, baud settings, unit identifiers and TCP connectivity before changing application logic. They also separate protocol faults from sensor, PLC, wiring and network problems.
The result should include tested mappings, meaningful error handling and documentation that another specialist can maintain. For German sites, practical collaboration may include on-site commissioning alongside remote preparation and clear technical communication in English or German.
Choosing the right fit
Look for evidence of comparable industrial integrations rather than familiarity with the protocol name alone. Ask which PLCs, drives, meters, SCADA systems and gateways the specialist has connected, and how they test register values in live environments. Experience with cybersecurity, industrial Ethernet, OPC UA, MQTT and functional safety can matter when Modbus data becomes part of a wider automation architecture.
A strong professional explains trade-offs clearly. They know when Modbus is sufficient, when an OPC UA layer is useful, and when a different industrial protocol better fits real-time, safety or vendor-specific requirements.
Frequently asked questions
Curious about Modbus? Here are the answers that come up again and again.
Modbus is used to exchange process data and commands between PLCs, sensors, meters, drives, remote I/O and supervisory systems. Companies often choose it for machine integration, energy monitoring, building automation and access to equipment from different manufacturers.
Modbus RTU typically runs over serial connections such as RS-485, while Modbus TCP carries the protocol over Ethernet. RTU requires careful attention to baud rate, parity, termination and unit identifiers; TCP adds network configuration and port management.
Modbus is simple and widely supported, but it provides less built-in structure, security and semantic information than OPC UA. MQTT suits publish-and-subscribe data flows and cloud connectivity, while OPC UA is often preferred for richer, structured industrial information models.
Modbus work often requires knowledge of PLC programming, SCADA or HMI configuration, industrial Ethernet, serial wiring and gateway setup. Familiarity with OPC UA, MQTT, network diagnostics and cybersecurity helps when the integration extends beyond direct register exchange.
Modbus projects vary from a small register mapping to a plant-wide integration with legacy equipment and several gateways. The right level of experience depends on the number of devices, documentation quality, commissioning risk and whether the work includes PLC changes or live production support.
Modbus configuration, documentation and much of the diagnosis can be handled remotely through approved access and test environments. Physical wiring, cabinet checks and commissioning may require on-site work in Germany, so the project should define access, safety procedures and language expectations early.
Modbus quality is shown through accurate register maps, repeatable tests, clear fault handling and documentation of device settings. Ask the specialist to explain how they isolate wiring, serial, network, addressing and application faults instead of treating every issue as a protocol problem.
Modbus assignments depend heavily on reliable device manuals, register definitions, access permissions and a safe test plan. A professional should clarify the physical interface, protocol variant, data representation, polling limits, commissioning responsibilities and whether production changes need formal approval.
The average hourly rate of freelancers in Germany who have used Modbus in their recent projects is 92 €, which corresponds to a daily rate of about 740 € based on an 8-hour working day.
Of the freelancers in Germany who have used Modbus in their recent projects, 83% hold at least a Bachelor's degree, 56% hold at least a Master's degree, and 11% hold a doctorate.
On average, freelancers in Germany who have used Modbus in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 2.4 years.
The most common languages among freelancers in Germany who have used Modbus in their recent projects are English (100%), German (98%), and French (26%).
The most common industries among freelancers in Germany who have used Modbus in their recent projects are Manufacturing (86%), Information Technology (70%), and Automotive (51%).
The most common business areas among freelancers in Germany who have used Modbus in their recent projects are Product Development (98%), Information Technology (91%), and Quality Assurance (74%).
Main locations of FRATCH Experts, who have recently used Modbus
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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FRATCH CEO
