TCP/IP Experts in Dusseldorf
matched in minutes by AIHire experts who design resilient network communication, troubleshoot complex connectivity issues and secure IP-based infrastructure across cloud, enterprise and industrial environments. FRATCH matches you quickly with vetted, available freelance professionals whose skills fit your exact requirements.
Meet FRATCH Experts in Dusseldorf, who have recently used TCP/IP
Timo T.
Last position:
Gronic Ident & Sign at Gronic Systems GmbH
Gronic Ident & Sign
Core technologies: Android, Jetpack Compose, Retrofit, Regula Document Reader, Adobe Sign
Android app on dedicated devices for identifications and electronic signatures at the PoS
Andreas W.
Last position:
Freelancer at Infrafibre Networks GmbH
- Determining the current status (planning status / expansion status) of the so-called interpolygon routes
- Preparing an end-to-end project plan for the individual routes, taking active and passive components and activities into account
- Monitoring and controlling plan implementation
- Optimizing the selected network architecture
- Creating network and splice plans
Jürgen S.
Last position:
IT – Consultant / Analyst / Developer / Tester / Support at Automotive manufacturer
- Analysis, software development/adaptation and testing of various transaction and batch objects
- Execution of specialist integration and regression tests on TEST and QA platforms under z/OS for subsequent implementation in production
- Hardware / software / tools: IBM-MVS, z/OS, JES2/3, TSO-ISPF, JCL, DB2, SQL, SQL/PL, QMF, QMF for Work-Stations, SPUFI, FileAid, IMS-DB/DC, MFS, XPEDITER, COBOL, REXX, Windows-10, MS-Office-365, MS-Teams, batch job management via OPC, BETA92, RVS, BVB, ABL, DIALOGplus, PROBA, PRODPR (VW internal systems), JIRA, CONFLUENCE
Andreas G.
Last position:
Senior Fullstack .NET (Core) & Angular Developer at IT Service Provider
- Supporting several agile teams in the new product development of an enterprise CRM and ERP application
- Web frontend development with Angular 17–21 (microfrontends, Domain-Driven Design, MDB-Bootstrap)
- Backend development with C# and .NET 7–10, MongoDB, MassTransit, RabbitMQ, Entity Framework Core, ElasticSearch (microservices, DDD)
- Technical feature design for assigned tasks
- Technical architecture design including forward-looking planning of AI-supported extension options
- Proof-of-concept implementation of AI-supported workflows with n8n and a locally hosted LLM (Ollama)
- Coordination with stakeholders and Product Owners, support with sprint planning
Result: Delivery of production-ready microservices and frontend modules in agile sprint cycles.
Environment: .NET 7–10 · Angular 17–21 · C# · TypeScript · OpenAPI · Microfrontends · DDD · Kubernetes · Docker · Helm · MS SQL Server · PostgreSQL · MongoDB · MassTransit · RabbitMQ · EF Core · ElasticSearch · Kibana · Azure DevOps · KeyCloak · n8n · Ollama
Daniel P.
Last position:
Freelance specialist in industrial automation technology at dPSolutions
- Self-employed PLC and software specialist focusing on automation and special-purpose machinery
- Programming, modernization, expansion and optimization of production systems, focusing on increased efficiency, 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)
- Integration of external systems such as reading devices, printers, scales, scanners and cameras, as well as various bus systems (Ethernet, Profinet, Profibus, EtherCAT, CAN bus, RS232, TCP/IP)
- Creation of visualizations and HMI applications with Siemens WinCC flexible, Beckhoff HMI and .NET frontends
- Planning, development and integration of machine vision solutions (Keyence, Cognex, AVS Alfavision, camera systems) in PLC and PC environments
- Design and implementation of process data collection 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
- Planning and programming of conveyor, inspection, assembly, packaging and grinding systems in industries such as automotive, chemical, food, electronics, machinery and systems engineering
- Conducting workshops and training on Siemens TIA Portal, STEP7 Classic, Beckhoff TwinCAT (including TwinSAFE), as well as topics such as 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 requirements analysis through planning, concept development and supplier coordination to commissioning, production support and customer support
Hisham E.
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)
Yan O.
Last position:
Software Developer (C++, Python) at Vaillant Heizsysteme
- Implementation of communication between heating system modules via the SOME/IP interface in C++
- Development of additional software components in C++
- Execution of unit tests and integration tests in the GitLab CI workflow
- Development of desktop publishing functionality
- Tools: C++, Python, Linux, Robot Framework
Alois G.
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
Esmail S.
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
Jonas S.
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
Humayun S.
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 L.
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 S.
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
28 years (Germany: 26 years)
Position duration
2.7 years (Germany: 3.2 years)
Positions per freelancer
19
Top business areas
Information Technology, Project Management, Product Development
Top industries
Information Technology, Telecommunication, Automotive
Certification focus areas
Information Technology, Project Management, Quality Assurance
Bachelor's degree or higher
57% (Germany: 87%)
Master's degree or higher
29% (Germany: 55%)
Certifications per freelancer
5 (Germany: 3)
Most common languages
German, English, Arabic
Speak two or more languages
85% (Germany: 99%)
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 Dusseldorf 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 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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
TCP/IP 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 (77%)
- Telecommunication (69%)
- Automotive (46%)
- Energy (46%)
- Transportation (46%)
- Manufacturing (46%)
- Professional Services (46%)
- Government and Administration (46%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What TCP/IP covers
TCP/IP is the core communication model behind the internet and most modern networks. It defines how data is addressed, divided into packets, transmitted, routed and delivered between systems. The suite includes Internet Protocol, TCP, UDP, ICMP and application protocols such as DNS, HTTP and TLS that run across its layers.
Systems it connects
Companies use TCP/IP to connect web applications, databases, office networks, cloud services, industrial devices and customer-facing APIs. It supports communication across local networks, private infrastructure, data centres and the public internet. Strong network design keeps traffic reliable while allowing systems to grow and recover from disruption.
- Plan IP addressing and subnet structures
- Connect cloud, on-premises and hybrid environments
- Support APIs, web services and distributed applications
- Link devices, sensors and operational systems
Ecosystem and tooling
TCP/IP work spans Ethernet, Wi-Fi, IPv4, IPv6, routing, switching, VPNs, firewalls and load balancing. Specialists use tools such as Wireshark, tcpdump, ping, traceroute and netstat to inspect traffic and isolate faults. They may also work with Linux, Windows Server, DNS, DHCP, Kubernetes networking and cloud networking services.
When freelance expertise helps
Companies often bring in external specialists during migrations, outages, security reviews or major infrastructure changes. The right professional can investigate packet loss, latency, routing errors, name-resolution failures and intermittent service access without slowing internal teams. In Dusseldorf, this can support local manufacturers, logistics operations, retailers and service companies while combining on-site discovery with remote implementation.
- Diagnose hard-to-reproduce connectivity faults
- Review network segmentation and access paths
- Prepare IPv6 or cloud migration plans
- Validate performance, resilience and monitoring
What strong professionals deliver
Experienced TCP/IP professionals start with evidence: traffic captures, routing tables, logs, topology maps and clearly defined symptoms. They separate application, transport and network-layer causes instead of changing configuration at random. Their deliverables may include addressing plans, network diagrams, firewall rules, runbooks, test results and practical handover documentation.
Choosing the right specialist
Look for someone who can explain packet flow from an application to its destination and relate protocol behaviour to business impact. Ask for examples involving the relevant operating systems, cloud providers, security controls or industrial protocols. For remote collaboration, agree on access procedures, diagnostic data, working language and escalation paths; on-site work may be valuable when cabling, equipment or physical segmentation must be assessed.
Frequently asked questions
Need clarity? These are the questions we hear most often about TCP/IP.
TCP/IP is used to move data between computers, devices, applications and networks. It supports services such as websites, email, APIs, cloud workloads, remote access, industrial communication and connected devices.
TCP/IP includes both TCP and UDP, which serve different communication needs. TCP confirms delivery and preserves packet order, while UDP reduces overhead and suits time-sensitive traffic such as voice, video, DNS and telemetry where occasional loss may be acceptable.
A strong TCP/IP specialist should understand routing, switching, DNS, DHCP, firewalls, VPNs and network monitoring. Experience with Linux, cloud networking, IPv6, Wireshark and security controls is useful when the work crosses infrastructure and application boundaries.
The right level depends on the risk and scope of the work, not on the technology name alone. A contained troubleshooting task may need focused protocol knowledge, while a migration, segmented enterprise network or industrial rollout calls for broad design, security and documentation skills.
TCP/IP analysis, configuration and documentation can often be handled remotely through approved access, logs and packet captures. On-site collaboration in Dusseldorf becomes more valuable when the project involves physical cabling, network hardware, warehouse equipment or coordination with local operations teams.
Ask the professional to explain a fault using packet flow, evidence and a clear test plan. Good work distinguishes routing, transport, name-resolution and application problems, documents each change and includes validation steps rather than relying on unexplained configuration changes.
Yes. TCP/IP includes the principles and protocols used with both IPv4 and IPv6, while IPv6 changes addressing, neighbour discovery and some operational practices. A specialist should be able to assess dual-stack design, routing, firewall policy, monitoring and application compatibility.
Typical TCP/IP deliverables include topology diagrams, IP and subnet plans, routing or firewall changes, diagnostic reports and test results. For lasting value, the professional should also provide monitoring guidance, rollback steps, runbooks and a clear handover for the internal team.
The average hourly rate of freelancers in Dusseldorf, Germany who have used TCP/IP in their recent projects is 88 €, which corresponds to a daily rate of about 706 € 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 28 years of professional experience, with a single engagement typically lasting around 2.7 years.
The most common languages among freelancers in Dusseldorf, Germany who have used TCP/IP in their recent projects are German (100%), English (85%), and Arabic (8%).
The most common industries among freelancers in Dusseldorf, Germany who have used TCP/IP in their recent projects are Information Technology (77%), Telecommunication (69%), and Automotive (46%).
The most common business areas among freelancers in Dusseldorf, Germany who have used TCP/IP in their recent projects are Information Technology (92%), Project Management (69%), and Product Development (62%).
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.
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