TCP/IP Experts in Dusseldorf
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Meet FRATCH Experts in Dusseldorf, who have recently used TCP/IP
Andreas Wißkirchen
Last position:
Freelancer at Infrafibre Networks GmbH
- Assessing the current status (planning stage / rollout status) of the so-called inter-polygon routes
- Creating an end-to-end project plan for the individual routes, considering active and passive components and tasks
- Monitoring and controlling the implementation of the plan
- Optimizing the chosen network architecture
- Creating network and splice diagrams
Alois Gruber
Last position:
Bank DZ Privatbank S.A.
- Various programming tasks as specified
- Work carried out from home office, meetings/tasks via email, phone and Microsoft Teams
- Version control via GIT
- Implementation with RDI, FreeSQL SQL
- Extension of automatic test environment creation as specified - adding automatic transfer of existing iSeries users and preparation as well as anonymization of test data
- Creation of trigger and service programs in SQLRPGLE, FreeRPG, ILE RPG and CLLE
- Development and implementation of the CallKredite project including additional extensions for other departments
- Conversion of RPG to Free-RPG and SQL as well as extension of existing modules as specified
- Migration to a new banking release
- Support for specialist segment / OIV
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
Esmail Saberi
Last position:
Senior Load and Performance Tester at Deutsche Bahn (DB-Netz)
- Design, development, and execution of load and performance tests for the PRISMA project
- Use of Apache Jmeter, Gatling, Apache ActiveMQ, Jms/Tibco Ems, SikuliX, Jython, Amazon AWS, PAN-Client
- Methods: load tests, test automation
Hisham Elsharawy
Last position:
System Engineer Network & Security at Isringhausen GmbH
- Operation, maintenance and administration of the global network & security system landscape
- Troubleshooting and support in 2nd & 3rd levels and provide technical advice to other dept.
- Configuration of complex LAN/WAN/SD-WAN and WLAN network infrastructures (N5K, N9K, ASR 8000, Wireless Controller WLC9800, AP C91xx and VMware Velo Cloud)
- Control of external service providers as part of service and escalation management
- Implementation and monitoring of system updates (software upgrades, minor/major changes)
Jonas Sickel
Last position:
Subproject Manager / Consultant – d.3 DMS Solution Implementation at InterRisk Versicherungs-AG
- Planning the migration of the legacy archive to the new d.velop-documents platform
- Managing external service providers and internal project stakeholders
- Connecting existing systems to d.velop documents
- Project planning, control and reporting
Yan Ozer
Last position:
Software Developer (C++, Python) at Vaillant Heizsysteme
- Implemented communication between heating system modules via the SOME/IP interface in C++
- Developed additional software components in C++
- Executed unit tests and integration tests in the GitLab CI workflow
- Set up desktop publishing functionality
- Tools: C++, Python, Linux, Robot Framework
Andreas Grutz
Last position:
Senior Fullstack .NET (Core) & Angular Developer at IT service provider
- Supported an agile team in the development of a new CRM tool
- Web frontend development (Angular 17 with MDB-Bootstrap, microfrontends, DDD)
- Backend development (C# & .NET 7-9, MongoDB, MassTransit, RabbitMQ, Elasticsearch, microservices, DDD)
- Coordination with stakeholders & product owners
- Assisted in sprint planning
Humayun Shaukat
Last position:
Test Manager at ProSiebenSat.1 Media SE
- Quality assurance for 7 apps and websites as well as Galileo
- Designing, planning and executing tests
- Designing the test strategy in an agile team
- Planning, monitoring and coordinating test activities
- Reviewing and matching test cases
- Documenting test results
- Reviewing found defects
- Collaborating with developers
- Conducting regression tests
- Creating test summary reports
- Participating in various meetings with all stakeholders
- Approach, tools & systems: Jira, Android Studio, iOS, Android, Agile-Scrum
Heinz-Dieter Lühmann
Last position:
Consultant at CH Crypto Group
- Advice on governance and information security topics: BAIT, MaRisk
- Creating governance documents (policies, guidelines)
- Developing emergency manuals
- Based on BSI IT baseline protection standard 200-4 and ISO2700x
Yvonne Scislowski
Last position:
Senior Management Consultant at Scillcon GmbH
Discover over 15,000 top freelancers
Statistics of experts using TCP/IP
Aggregated from the professional profiles of matched freelancers.
Experience
27 years (Germany: 26 years)
Position duration
2.8 years (Germany: 3.3 years)
Positions per freelancer
18 (Germany: 19)
Top business areas
Information Technology, Project Management, Product Development
Top industries
Information Technology, Telecommunication, Manufacturing
Certification focus areas
Information Technology, Human Resources, Operations
Bachelor's degree or higher
57% (Germany: 87%)
Master's degree or higher
29% (Germany: 53%)
Certifications per freelancer
5 (Germany: 3)
Most common languages
German, English, Arabic
Speak two or more languages
82% (Germany: 98%)
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 Dusseldorf 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 Dusseldorf using TCP/IP
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
Core networking layer TCP/IP is the base communication stack behind most business networks and internet traffic. It covers how data is addressed, routed, sent, and reassembled across systems that need to talk reliably. Companies bring in specialists when application traffic, remote access, or cross-site connectivity depends on clean network behavior.
What experts handle They work on the Transmission Control Protocol and Internet Protocol parts of the stack, plus the settings around them.
- IP addressing and subnetting
- Routing, gateways, and DNS paths
- Port and firewall coordination
- Packet loss and latency analysis
- Connectivity between apps, servers, and devices
Common project work TCP/IP specialists often join network rollouts, data center changes, cloud migrations, and security hardening. They help when services are reachable but unstable, when private networks need segmentation, or when teams must connect offices, VPNs, and hosted systems. In Dusseldorf, this often matters for firms with office networks, logistics, media, and industrial setups.
Tooling and adjacent skills Strong professionals usually know more than the protocol names. They read packet captures, work with routing tables, understand firewalls, and can explain issues across operating systems and network hardware.
- Wireshark and traffic traces
- TCP, UDP, ICMP, and DNS basics
- VLANs, VPNs, and NAT
- Linux and Windows network commands
- Documentation for operations teams
When to bring in freelance help Freelancers are a good fit when internal teams need focused support for a short network task or an urgent fault. They can diagnose intermittent drops, review segmentation, prepare a migration plan, or verify that critical services stay reachable after changes. Clear logs, diagrams, and access to test systems help them move faster.
What strong specialists deliver Good TCP/IP professionals do not just name protocols. They trace packets, isolate the layer where failure starts, and turn findings into practical fixes that teams can keep using. For Dusseldorf companies, remote work is often enough for analysis and documentation, while on-site time helps when they need to test cabling, edge devices, or local network segments.
Frequently asked questions
Need clarity? These are the questions we hear most often about TCP/IP.
TCP/IP is the communication stack that lets systems exchange data across local networks, VPNs, and the internet. Companies use it for application traffic, server access, monitoring, and service-to-service communication. A good specialist helps when those paths are slow, blocked, or unstable.
TCP/IP is the common name for the protocol suite that underpins internet and private network communication. It includes IP, TCP, and related parts such as ICMP and often UDP in real-world work. People sometimes say the TCP/IP stack or Internet protocol suite when they mean the same thing.
TCP/IP is the broader network model, while TCP and UDP are transport protocols inside it. TCP is used when delivery, order, and retries matter, such as for web sessions or file transfer, while UDP fits lower-latency traffic like voice or streaming. A specialist should know how both behave under load and loss.
A strong TCP/IP specialist usually understands subnetting, routing, DNS, firewall rules, NAT, and packet capture tools. Linux and Windows network commands also matter because many issues are diagnosed from the host side. For larger environments, cloud networking and VPN setup are useful too.
TCP/IP work can be simple or deep depending on the problem. A basic address plan or VPN check may need a focused specialist, while routing failures, segmentation, or unstable application links need someone who has handled production networks before. The key is hands-on troubleshooting, not just theory.
Many TCP/IP tasks can be done remotely if the specialist has logs, packet captures, diagrams, and access to test systems. On-site help becomes useful when the problem involves switches, cabling, local edge devices, or a site that needs live verification. For Dusseldorf teams, both models are common.
Look for someone who explains network behavior clearly, not just someone who lists tools. A strong TCP/IP freelancer identifies the layer where the issue starts, shows evidence from traces or logs, and gives a fix that fits your environment. Good documentation and clean handover are a strong sign.
Typical TCP/IP problems include wrong subnet masks, routing loops, blocked ports, DNS confusion, and assumptions that the network is fine because one test worked. In production, these mistakes often surface only under real traffic or after a network change. A specialist should test the full path, not just a single host.
The average hourly rate of freelancers in Dusseldorf, Germany who have used TCP/IP in their recent projects is 92 €, which corresponds to a daily rate of about 736 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used TCP/IP in their recent projects, 57% hold at least a Bachelor's degree and 29% hold at least a Master's degree.
On average, freelancers in Dusseldorf, Germany who have used TCP/IP in their recent projects have 27 years of professional experience, with a single engagement typically lasting around 2.8 years.
The most common languages among freelancers in Dusseldorf, Germany who have used TCP/IP in their recent projects are German (100%), English (82%), and Arabic (9%).
The most common industries among freelancers in Dusseldorf, Germany who have used TCP/IP in their recent projects are Information Technology (73%), Telecommunication (73%), and Manufacturing (55%).
The most common business areas among freelancers in Dusseldorf, Germany who have used TCP/IP in their recent projects are Information Technology (91%), Project Management (73%), and Product Development (64%).
Main locations of FRATCH Experts, who have recently used TCP/IP
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 Request a free demo
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Philipp Thomaschewski
FRATCH CEO
