RS-232 Experts in Germany
in minutes from over 15,000 CVs with the power of AIHire experts who keep RS-232 links stable across serial ports, COM port setups, and EIA-232 device connections. They handle legacy hardware, cable pinouts, modem-style links, and field service integration with fast, precise matching from vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used RS-232
Nazif Küçükkoc
Last position:
Self Employed at Self Employed
Providing services to cover the complete electronic product design process.
- Requirement validation
- Creating / re-writing / breaking down requirements
- Requirement analysis and functional partitioning
- Component selection and risk assessment
- Component library management
- Schematics design
- Safety and reliability assessment
- HDI PCB design
- Design review against requirements
- Readiness for manufacturing review
- Readiness for testing review
- Readiness for verification review
High Power Density BLDC Driver Module with MCU as controller:
- PCB module with heatsink
- L47mm x W36mm x H19mm compact sizes
- Nominal input voltage: 48V
- Sinusoidal continuous RMS current: 50A
- STO, Digital input and outputs
- Analog signal inputs
- CANBUS interface
- RS232/RS485 interface
- Multilayer FR4 design (No aluminum PCB)
Integrated Mission Computer & Smart 5kW PDU
- Featuring 3 different current limits, in total 63 power outputs
- Featuring programmable current amplitude and on-time, in total 84 CC power outputs.
- Ethernet, CANBUS, MIL-BUS, RS485 communication interfaces
- In total 120 Open-Short, Open-GND, 28V-GND types discrete I/O interfaces
- BIT and CIT solutions to monitor output voltage, current and board temperature
Giuseppe Abrignani
Last position:
Embedded Software Developer at Inheco
- AI Integration (LLM & RAG): Design and build of an internal intelligent RAG system (Retrieval-Augmented Generation) based on LLMs, n8n, and vector data for the automated analysis of technical documents and error logs.
- Design & Implementation: Design of a robust RS-232/UART communication interface for an SBC-based embedded device to control medical shaker systems.
- Architecture & Protocol Design: Implementation of a highly maintainable software structure (OOP, SOLID) and definition of hardware-close, resilient communication protocols including multithreading and advanced error handling.
- Quality Assurance & DevOps: Test automation using xUnit, integration tests directly on the hardware target, and maintenance of technical documentation according 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
André Howe
Last position:
Linux IT Admin at ReiserST
- Development and maintenance of IT architectures with embedded Linux systems.
- Designing, implementing, and optimizing backend applications and script-based solutions.
- Analyzing and resolving issues, including troubleshooting and user support.
- Developing and implementing security concepts for cloud solutions.
- Administering networks (DHCP, DNS, NTP, VPN).
- Technologies: Linux, PowerShell, Bash, Python, Ansible, Kubernetes, GitLab CI.
- Methods: Kanban.
Hendrik Wagner
Last position:
Software Test and Maintenance Support at Anton Paar ProveTec GmbH
- Add/create test specifications
- Conduct regression tests
- Conduct release tests
- Analyze Jira tickets
- Identify software defects and fix them with C#
Paul Privler
Last position:
Independent Consultant – Industry/ Embedded/ IoT at Self-employed
Consulting and support in the areas of sales/business/technology/development/marketing:
- Sales, Key Account Management
- Business Development, business/corporate development
- Partner management
- Program/project management
- Product management & marketing
- Technical marketing, content marketing
- New business, innovation and technologies
Until July 2021 active as advisor and consultant for Mixed Mode in the areas of Key Account Management, Project Management and Business Development.
From Q3/2021 successful delivery of various customer projects in the area of Business Development, corporate development, consulting, coaching, technical content management, sales and marketing:
- EMS service provider and PCB test house, inspection systems: revision of company portfolio and presentation. Integration of specialized distribution for optical inspection systems from Japan: content management, marketing, communication, web, sales automation, lead generation
- Full service marketing agency – technology marketing for industry: expansion of the existing B2B and B2C marketing portfolio with industrial and technology topics: content management, presentation and focus on "technical marketing", web, target market and customer analysis, lead automation, consulting
- Software product manufacturer & software development in the field of security for Embedded & IoT: company alignment and portfolio definition for an IoT and Embedded Security company with a SaaS solution for IoT device management: building a partner network to offer complete Embedded/IoT security solutions, technical content, company alignment and portfolio definition, strategy & planning, target market and customer analysis, product marketing/USPs for the security device management tool "IoT-Suite", standards and regulations for cyber resilience (e.g. CRA, NIS2, RED), web content, SEO, management of marketing and sales agencies, CRM, sales, presentations, trade fairs, congresses, building company webinars & events
- Software engineering service provider/system house for IoT, Embedded, web, mobile and desktop applications: business development, content creation, customer acquisition and sales
- Manufacturer of memory products with security features as an add-on: memory products in standard form factors (SD, CF, SSD...) are extended with security modules such as HSM, TPM or secure elements and thus offer users secure data storage, transfer and access. Also interesting as an upgrade or retrofit solution to meet the coming new regulations and requirements regarding cybersecurity such as CRA, RED and NIS2. Business & New Business Development for the area "Embedded IoT Solutions & Security", sales & marketing. Expansion of the pure semiconductor business to include security solutions and services. Interface between management, marketing, sales and product management. Building business partners, technology partners, system integrators and resellers from the Embedded, IoT, OT and IT environment. Creating reference designs/demos/lighthouse cases and proof of concepts for cross- and reference selling. Co-marketing with security partners. Technical content creation for web, sales and marketing, webinars, social media etc. Networking, participation in trade fairs, congresses and events. Lead generation, qualification, follow-up and conversion to customer. Product definition, USPs, features. Analysis of competitors, market positioning, target markets - strategy, concept and measures - go to market.
- Marketing agency group with sales and management consulting: consulting for companies on restructuring, market analysis and market entry, go-to-market concepts, customer acquisition and expansion, new customer generation, lead generation and management, concepts and execution of campaigns (web, mail, social media, phone outreach in person or with AI voice assistant, webinars...). Processing and managing customer product data for PIM product information and DAM data asset management systems. Focus on customers in the industrial and technology environment with products and services that need explanation.
Roland Rathmann
Last position:
Support in Ongoing Project at Automotive Supplier
- closing the safety case
- creation of meaningful traceability matrices and targeted test expansion
- transferring requirements into other database systems
- structuring the requirements, assessing their completeness, and setting up new test cases based on use-case–based test strategies and the results of internal traceability matrices
- partial automation of tasks within a requirement assessment tool
- tools and languages: MS Teams, reqIF, Enterprise Architect, Codebeamer, proprietary tools for creating and evaluating traceability matrices (approx. 1000 x 1000)
Luca Pacor
Last position:
ERP Program Manager at Fiserv
The client is undergoing a comprehensive transformation. All SAP ECC landscapes worldwide are being migrated to SAP S/4HANA, with the goal of introducing a global standard template.
The program also includes the migration and modernization initiative "RISE with SAP", which may involve migrating selected country installations to the SAP Private Cloud.
On the stakeholder side, the program's reporting line extends up to the company's board and the implementation partner's board.
Fiserv Germany's ERP landscape currently includes several non-standard SAP tools and applications that extend the ECC environment's functionality and often integrate with downstream systems. As part of the move to SAP S/4HANA, it is essential to assess the core functionality, integration points, and future viability of these applications to determine their alignment with the target architecture.
The focus of the role is to provide expert advice and assessment to define the scope, strategy, and roadmap for migrating Fiserv Germany's SAP ECC system to SAP S/4HANA.
SAP's recommended best practices are followed, and a structured approach is used to ensure a smooth transition with minimal disruption while maximizing business value.
This assessment forms the basis for a successful SAP S/4HANA transformation, ensuring alignment with industry best practices, regulatory compliance, and future scalability.
Migration strategy definition – evaluating available transition approaches based on business objectives, technical feasibility, and SAP best practices.
Technical readiness assessment – conducting a system analysis to assess compatibility, custom code impact, data volume management, integration points, and infrastructure readiness for SAP S/4HANA.
Business process impact analysis – reviewing the latest business process documentation to define the scope and effort needed to implement required functions in SAP S/4HANA and identify process optimization opportunities.
Roadmap for non-SAP systems and applications – evaluating third-party and legacy applications for SAP S/4HANA integration and recommending consolidation, migration, or replacement strategies.
Deployment & implementation planning – defining a phased rollout approach, including project timelines, risk mitigation strategies, and key milestones aligned with business priorities.
The transformation is carried out in phases: the discovery phase leads to the explore phase, which then leads to the design phase and finally to the implementation phase.
Program management
Change management
Requirements management
Transition management
Stakeholder management
Risk management
Comprehensive coordination
André Görst
Last position:
IT Consulting Project Management / Engineering Subproject Management at T-Systems (on assignment for government agencies)
- Projects for federal networks (NdB).
- CR management, EoL change requests, design and documentation according to ITSCM.
- Data center planning.
- Project management and engineering subproject management.
- Software development for virtual server environments according to BSI.
Michael Eilers
Last position:
Software Developer at Continental
- Supported a telematics component in the automotive sector with SELinux and open-source license management.
- Products: SELinux, iMX8, ScanCode.
- Skills: Linux, firmware development, Python.
Srecko Soric
Last position:
Test Consultant at PROSEQUM GmbH
- Taking over operational acceptance tests for internal and external applications in a preproduction environment
- End-to-end tests across multiple systems
- Planning and implementation of acceptances based on expected loads and service levels
- Creation of test plans and automated tests
- Monitoring of systems, log analysis and creation of test reports, monitoring charts and acceptance documentation
- Support during rollouts of security and OS patches in preproduction
- Load and performance tests as well as failover/rollback tests
- Testing SOAP/REST APIs with JMeter, Grafana and Kibana
- Batch tests with Bash and log analysis
- Load and performance tests of own applications
- Test automation with JMeter and PyTest
- Maintenance and creation of Bash scripting tests
- Manual system integration tests
Sergej Vontobel
Last position:
Software Developer Motor Control (Project "Multi DMR – Motor-Control") at Lorch Schweißtechnik GmbH
- Modification and redesign of the software for a series component
- Review of the software concept and extension of functionality
- Modification of software functions for DC motor control
- Hardware: ARM STM32G474, CAN bus, Lauterbach T32
- Software: Microsoft Visual Studio Code
Tamás Nagy
Last position:
JAVA development for thermal printer test program at GeBE Elektronik und Feinwerktechnik GmbH
JAVA development for thermal printer test program
Further development of the free thermal printer test program in Java 1.8 AWT and Swing
Creating new plugins for sensor feedback using a real-time bar chart
Using multiple printer languages for USB, UDP, TCP and RS232 communication
Improving usability and responsiveness with threads and string buffering
Querying and displaying network configuration
Converting and processing hex data from printer responses
Advanced study of servomotors and USB bus
Enumerating available USB ports from the Windows Registry, retrieving additional information via PowerShell, parsing and listing all in a Java list box
Fixing reported database errors
Detecting if the printer driver is installed and recognizing physically connected devices
Migration to Windows 11
Handling customer tickets as part of support in C++ and Qt6
Writing CMake scripts
Compiling STM32 printer firmware with CMake and managing the process in FileMaker Pro
Technologies: Eclipse, Java 1.8, AWT, Swing, RS232, USB, TCP, UDP, PowerShell, servomotor technology, Windows 10 and Windows 11, WSL 2.4, Ubuntu Linux, CMake, Qt6, FileMaker Pro
Mike Barthel
Last position:
System and Endpoint Hardening at CLAAS
- Evaluating and assessing the current state
- Preparing and conducting security audits
- Vulnerability characterization and risk analysis
- Assessing, coordinating and transforming identified vulnerabilities into target states
- Coordinating stakeholder interests
- Developing and implementing IT security strategy for OT and IoT (continuous risk assessment and risk management, awareness, multi-layered security solutions, regular security audits, access restrictions)
- Organizational and technical documentation, presentations and workshops
- Skills: Qualys, Splunk, Nessus, QRadar, National Vulnerability Database (NVD / NIST), Open Worldwide Application Security Project (OWASP), OT, CERT/CC, BSI IT-Grundschutz catalogs, ISO 27001, MITRE ATT&CK, Center for Internet Security (CIS), GitHub, Active Directory, PowerShell, Symantec Endpoint Protection, Microsoft Azure and Office365 App Security, ITSM
Daniel Pohl
Last position:
Freelancer in industrial automation engineering at dPSolutions
- Independent work as a PLC and software specialist focusing on automation and custom machinery
- Programming, modernization, expansion and optimization of production plants with focus on efficiency improvements, data transparency and system integration
- PLC programming and safety with Siemens S7 Classic/TIA-Portal, Beckhoff TwinCAT 2/3 and CoDeSys
- Development of high-level language software and database applications (.NET / C#, C++, Visual Basic .NET, Borland/Embarcadero C++)
- Development of custom software solutions for industrial automation, including embedded systems (Raspberry Pi, Arduino, NodeMCU, ESP8266)
- System integration of external systems such as readers, printers, scales, scanners and cameras, as well as various fieldbus systems (Ethernet, Profinet, Profibus, EtherCAT, CAN bus, RS232, TCP/IP)
- Creation of visualizations and HMI applications with Siemens WinCC flexible, Beckhoff HMI and .NET front-ends
- Design, development and integration of machine vision solutions (Keyence, Cognex, AVS Alfavision, camera systems) in PLC and PC environments
- Design and implementation of process data acquisition systems and traceability solutions (100% traceability) based on Microsoft SQL Server (Compact, Express, Server) including stored procedures and direct PLC-SQL communication
- Creation of software and PLC concepts, standard function blocks and project libraries for PLC and high-level language projects
- Design and programming of conveyor, testing, assembly, packaging and grinding systems in industries such as automotive, chemical, food, electronics and machinery and plant engineering
- Conducting workshops and training on Siemens TIA-Portal, STEP7 Classic, Beckhoff TwinCAT (including TwinSAFE) as well as topics like architectures, safety, database integration and documentation
- Creation of technical documentation, manuals, training materials and class documentation with Microsoft Office and Doxygen
- Project management tasks from requirement analysis through planning, concept development and supplier coordination to commissioning, production support and maintenance
Dirk Eichler
Last position:
Senior IT Engineer at IT service provider
- Planning, concept design, re-design
- Pre-sales support
- Project support according to PRINCE2
- Setup of a CMDB
- Implementation of communication processes
Discover over 15,000 top freelancers
Statistics of experts using RS-232
Aggregated from the professional profiles of matched freelancers.
Experience
27 years
Position duration
3.8 years
Positions per freelancer
20
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Manufacturing, Automotive
Certification focus areas
Information Technology, Product Development, Quality Assurance
Bachelor's degree or higher
81%
Master's degree or higher
48%
Doctorate
10%
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100%
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Germany 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 Germany using RS-232
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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
What RS-232 is
RS-232 is a serial communication standard used to move data between devices over short cable runs. It is still common in lab gear, industrial controllers, cash systems, routers, and service tools. You will also see it called serial port, COM port, or EIA-232.
Where it is used
- Connecting machines to PLCs, sensors, and test rigs
- Servicing older terminals, printers, and console ports
- Reading configuration, logs, or diagnostics from field devices
- Bridging modern systems to legacy equipment through converters
Core expertise
Strong professionals know voltage levels, null modem wiring, handshaking, baud rates, and framing. They can trace pinouts, check signal integrity, and resolve mismatched settings between devices. They also understand when RS-232 is the right choice and when another interface is safer.
Ecosystem and tools
RS-232 work often touches USB-to-serial adapters, terminal software, logic probes, breakout boxes, and vendor service menus. Experts may work with embedded boards, industrial PCs, lab instruments, and network equipment. Good documentation habits matter because many issues come from adapter choice or cable wiring, not the device itself.
When companies bring in help
Companies usually look for outside experts when a legacy device stops talking, a new system must support an old serial interface, or production needs a reliable field repair path. In Germany, this often comes up in manufacturing, labs, utilities, and technical service teams that still depend on serial hardware.
What strong specialists deliver
A solid RS-232 specialist does more than swap cables. They identify the protocol settings, verify the physical layer, document the wiring, and leave behind a setup that support teams can use later. The best work is calm, methodical, and easy to repeat on the next site.
Frequently asked questions
Need clarity? These are the questions we hear most often about RS-232.
RS-232 is used for simple serial links between a computer and a device that needs a basic, reliable connection. It is common for configuration ports, diagnostics, console access, lab equipment, industrial controllers, and older peripherals. Many teams still rely on it when the hardware is stable and the data needs are modest.
RS-232 is the communication standard behind many serial ports and COM port connections, especially on older PCs and industrial equipment. The terms are often used together, but they are not identical: a serial port is the interface, while RS-232 defines the signaling and wiring rules. Searchers also use the name EIA-232 for the same standard.
A company should bring in an RS-232 specialist when a device will not communicate, when legacy equipment must connect to a modern system, or when serial wiring needs to be verified on site. This is also useful during plant moves, service work, and integration projects where downtime is costly. Good specialists reduce guesswork and keep the link stable.
RS-232 is simpler than USB or Ethernet and usually easier to diagnose, but it is slower and meant for short distances. Compared with RS-485, it is less suited to long cable runs or multi-drop networks. It remains a strong choice for point-to-point service and legacy compatibility.
A strong RS-232 professional should understand cables, pinouts, terminal programs, baud rates, parity, handshaking, and adapter behavior. Useful adjacent skills include embedded systems, industrial networking, and reading device manuals. Practical troubleshooting matters more than theory alone.
Many RS-232 tasks can start remotely if someone can share photos, logs, device manuals, and port settings. But wiring checks, cable swaps, and signal tracing often need an on-site visit, especially in Germany when equipment is inside a plant, lab, or service cabinet. The best setup is often remote analysis followed by targeted field work.
Look for someone who asks about the exact device model, connector type, cable length, and communication settings before suggesting a fix. A good RS-232 specialist explains the problem clearly, confirms the wiring, and documents the final setup. You want repeatable results, not just a one-time connection.
A RS-232 project often ends with working cable maps, verified port settings, tested communication, and short documentation for support teams. Depending on the case, the deliverable may also include adapter recommendations, wiring changes, or a fallback procedure for maintenance. That makes future troubleshooting much faster.
The average hourly rate of freelancers in Germany who have used RS-232 in their recent projects is 93 €, which corresponds to a daily rate of about 743 € based on an 8-hour working day.
Of the freelancers in Germany who have used RS-232 in their recent projects, 81% hold at least a Bachelor's degree, 48% hold at least a Master's degree, and 10% hold a doctorate.
On average, freelancers in Germany who have used RS-232 in their recent projects have 27 years of professional experience, with a single engagement typically lasting around 3.8 years.
The most common languages among freelancers in Germany who have used RS-232 in their recent projects are German (100%), English (100%), and French (21%).
The most common industries among freelancers in Germany who have used RS-232 in their recent projects are Information Technology (84%), Manufacturing (84%), and Automotive (71%).
The most common business areas among freelancers in Germany who have used RS-232 in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (89%).
Main locations of FRATCH Experts, who have recently used RS-232
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 
Munich Request a free demo
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Philipp Thomaschewski
FRATCH CEO
