TCP/IP Experts in Cologne
matched in minutes by AIWork with specialists who design resilient network communication, troubleshoot complex connectivity issues and connect cloud, enterprise and industrial systems through TCP/IP, with fast, precise matching to vetted, available freelancers.
Meet FRATCH Experts in Cologne, who have recently used TCP/IP
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
Pierre G.
Last position:
Ansible Automation, Windows Third Level Support at DB InfraGO AG
- PRISMA project
- Ansible automation
- Windows third-level support for Windows NT, Windows 2000, Windows 2013, Windows 2016, Windows 2019
Muhammad J.
Last position:
Embedded Linux Intern – IoT Sensor Prototype Development at DHL
- Built a modular C++ 20 embedded Linux acquisition system on a Raspberry Pi, synchronizing IMU and dual-camera data streams to sub-millisecond accuracy.
- Integrated retro-reflective and contrast sensors to trigger acquisition and detect gaps between sorter rails.
- Implemented SPI & I2C sensor communication, GPIO interrupt handling with libgpiod, and CSV & JSON output.
- Designed a multi-threaded acquisition pipeline and an SPSC queue between acquisition and writer threads.
- Built a Python/HTML/CSS based web-server and validated the prototype in a DHL warehouse for defect detection.
- Documented software behavior, configuration, and results for maintainable handover and further development.
Stefan M.
Last position:
Bundesrechtsanwaltskammer
- Design, planning and execution of complex acceptance tests for a document exchange platform for the German justice authorities.
- Validation of decrypted and certificate-based message exchange via web platform, mobile app, and Java API.
- Documentation of test cases, execution steps, and test results.
- Technologies: Windows 11/10, Ubuntu, iOS, Android, Bash for Windows, Java 17, IntelliJ, Git, Jira, Confluence, Citrix Server, xJustiz standard implementation, specific justice software.
Sebastian H.
Last position:
Overall Project Manager; Turnaround Manager & Coach at Statutory Health Insurance Fund
- Taking over the troubled project from the internal project management and successful turnaround of project phase 1 (cutover of approx. 1000 servers (VMs)/standard desktops, specialized desktops)
- Responsible project management for the successful phase 1 transition (planning in the shortest possible time followed by implementation (very successful with low ticket volume))
- Stakeholder management – taking over direct (daily before cutover) communication with the client from the Chief Operation Manager in the format of regular meetings in taskforce mode. Rapid rebuilding of the previously lost trust base and restoration of the client relationship for optimal satisfaction
- Taskforce mode to eliminate all existing issues/showstoppers before cutover
- Scope clarification, setup, and scheduling of phase 2 activities (e.g. silo/admin servers)
- Kick-off of phase 2 / handing the project back to the success line for the internal project management/line to handle the remaining defined topics
- Establishing, preparing, and conducting steering committees with V-1 management to align the guardrails
- Moderation of various regular meetings and operational workshops
- Participation in the lessons learned with the client to address dissatisfaction related to the internal project management (before my start! They are extremely satisfied with my work)
- Tools: Atlassian Suite (Confluence/JIRA), MIRO, Sharepoint; MS Office (PowerPoint, Excel, MS Project)
René K.
Last position:
Freelancer at Freelance work
- Business analysis
- Requirements management
- Project management
- Stakeholder management
- Team leadership
Andreas W.
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
Vladimir M.
Last position:
Developer at Financial services provider
- Support and further development of a framework for developing applications in a banking association: DynS/OSPE
- Migration of the framework to Java 11 and Java 17
- Java8, Java11 and Java17, Spring, Spring-Batch, Spring WebServices, Spring-Security, Spring-Data, JPA, Hibernate, OpenSource libraries etc.
- XML, JAXB, JSON, REST and SOAP services, DB2, Oracle, WebSphere or Liberty AS, FreeMaker, Junit, mock libraries, JaCoCo, Maven, IntelliJ, Eclipse, GitHub, SVN, Jira
Peter B.
Last position:
Data Warehouse Consultant (Development and Analysis) at Atruvia AG
- Developed and enhanced ETL loading jobs with IBM DataStage and optimized SQL in an IBM DB2 environment as part of the Agree21 data migration
- Analyzed data quality and developed test procedures
- Created PowerShell scripts and documented GIT deployment processes
- Technologies: RedHat Linux, IBM DB2 with DBVisualizer, IBM InfoSphere DataStage 11.7, JIRA, TortoiseGIT, TortoiseSVN, PowerShell scripts
Miroslav P.
Last position:
Managing Consultant at ICTT Digital Networks
TSI customer project data center migration (since 2024-07-01)
Inventory of active IT/OT components
Creation / management of the migration concept
Planning / execution of migration tests
Execution of the IoT migration (network, VPN gateway, firewall adjustments)
Service migrations (mobile services)
Re-design of outdated technologies / services
Integration into operations
Logistics Bus project at Daimler Truck and Mercedes Benz (2024-01-01 – 2024-06-30)
Development Lead / Technical Consultant for the Logistics Bus
Coaching of customers / TSI development teams and Product Owners
Creation / review of architecture designs and documentation
Project planning / customer meetings
Support for migrations from Java/WebSphere/JBoss to Kubernetes
Service Design Performance Visibility (2022-06-01 – 2023-10-31)
Performance Visibility service development, network monitoring service for internal Telekom customers
Planning/integration/expansion of PV monitoring for cloud environments (AWS, Microsoft Azure)
Design/planning/implementation of Performance Visibility services based on NetScout / Kadiska software in customer environments
Agile project management / execution of PoCs (Proof of Concepts)
Design / architecture / concept creation
Diagnosis of network problems
Packet capturing / debugging
Creation of customer and training documentation
Finesa S.
Last position:
AWS Grocery App
- Designed and deployed a cloud-based grocery list app using AWS EC2 for hosting and RDS for persistent data storage, achieving 99.9% uptime across all test environments
- Reduced average response time by 2× through efficient deployment logic and optimized database queries, resulting in a smoother user experience across devices
- Utilized AWS (EC2, S3, RDS, IAM), Azure basics, Terraform, CloudFormation, Docker, Kubernetes basics, Jenkins, GitHub Actions, TCP/IP, DNS, Python, Bash scripting
Fabian Z.
Last position:
Freelance IT Specialist
IT specialist Application Engineering / Software Development since 2012
Discover over 15,000 top freelancers
Statistics of experts using TCP/IP
Aggregated from the professional profiles of matched freelancers.
Experience
25 years (Germany: 26 years)
Position duration
3 years (Germany: 3.2 years)
Positions per freelancer
21 (Germany: 19)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Telecommunication, Automotive
Certification focus areas
Information Technology, Operations, Project Management
Bachelor's degree or higher
70% (Germany: 87%)
Master's degree or higher
50% (Germany: 54%)
Doctorate
10%
Certifications per freelancer
5 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 99%)
Based on our profile pool as of 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Cologne 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 Cologne 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 19 Sep 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 (92%)
- Telecommunication (58%)
- Automotive (50%)
- Transportation (50%)
- Manufacturing (50%)
- Banking and Finance (42%)
- Insurance (42%)
- Government and Administration (42%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Core protocol
TCP/IP is the foundational communication suite behind the internet, enterprise networks, cloud services and connected devices. It defines how data is addressed, routed, transported and delivered between systems, from local networks to global services.
Network layers
Specialists work across the TCP/IP layers, including IP addressing and routing, TCP and UDP transport, DNS name resolution, DHCP configuration and application protocols such as HTTP, TLS, SSH and SMTP. They connect protocol behavior with firewalls, load balancers, proxies and operating systems.
Typical delivery
- Design IPv4 and IPv6 addressing plans
- Configure routing, subnets, VLANs and network segmentation
- Diagnose packet loss, latency, retransmissions and MTU issues
- Connect on-premises networks with cloud and hybrid environments
- Document interfaces, dependencies and operational procedures
TCP/IP expertise supports web platforms, APIs, enterprise applications, industrial control networks, telecommunications services and IoT systems. The right design helps systems communicate predictably under normal load and during failures.
Tools and practices
Work commonly includes packet captures with Wireshark or tcpdump, command-line diagnostics, network monitoring, firewall rules and infrastructure automation. Strong specialists understand Linux and Windows networking, routing protocols, VPNs, containers, Kubernetes networking and cloud services from AWS, Microsoft Azure or Google Cloud.
When to hire
- A migration needs dependable connectivity between sites or clouds
- Intermittent failures are difficult to reproduce
- IPv6, segmentation or firewall changes affect production systems
- A new service requires clear network interfaces and traffic paths
- Internal teams need an independent review of network architecture
Companies in Cologne may bring in freelance expertise for data-intensive services, manufacturing environments, logistics systems or distributed business applications. Remote collaboration works well when diagrams, access controls and diagnostic data are organized; on-site work can help with physical network changes and local infrastructure.
Quality signals
A strong professional starts with observable evidence rather than assumptions. They can explain packet flow clearly, separate transport problems from application faults, preserve security while troubleshooting and document decisions so the network remains maintainable after delivery.
Look for practical experience with the relevant operating systems, cloud environment and security controls. Clear change plans, rollback options, tested configurations and useful handover documentation are reliable signs of disciplined TCP/IP work.
Frequently asked questions
Not sure where to start with TCP/IP? These answers cover the essentials.
TCP/IP enables computers, services and devices to exchange data across local, private and public networks. Companies rely on it for web applications, APIs, email, cloud connectivity, remote access, industrial systems and connected products.
TCP/IP is a broad communication suite, while UDP is one of its transport protocols. TCP provides ordered, acknowledged delivery, whereas UDP reduces overhead and can suit real-time traffic where speed matters more than retransmission.
A strong TCP/IP specialist should understand DNS, DHCP, IPv4, IPv6, routing, VPNs, firewalls and network monitoring. Cloud networking, Linux, containers, Kubernetes, infrastructure automation and security knowledge are also valuable for modern systems.
A TCP/IP professional can help with a focused connectivity issue, a network redesign or a wider cloud and infrastructure migration. The required depth depends on the number of systems, the criticality of the service, the diagnostic evidence available and the production risk.
Much TCP/IP work can be completed remotely through secure access, shared diagrams, logs and packet captures. On-site collaboration in Cologne is more useful when the project involves cabling, physical equipment, local data centers or changes that require direct access.
Ask a TCP/IP specialist to explain the expected packet path, likely failure points and the evidence needed to test each hypothesis. Review the proposed controls, rollback plan, monitoring approach and handover documentation before approving production changes.
TCP/IP also supports internal enterprise networks, private cloud environments, factory systems, office services and device communication. Internet exposure changes the security requirements, but the same addressing, routing and transport principles apply inside private networks.
Before working with TCP/IP, clarify the network scope, access boundaries, maintenance windows, traffic requirements and existing documentation. Professionals should also establish how incidents are recorded and which security, privacy and change-management rules govern the environment.
The average hourly rate of freelancers in Cologne, Germany who have used TCP/IP in their recent projects is 93 €, which corresponds to a daily rate of about 742 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used TCP/IP in their recent projects, 70% hold at least a Bachelor's degree, 50% hold at least a Master's degree, and 10% hold a doctorate.
On average, freelancers in Cologne, Germany who have used TCP/IP in their recent projects have 25 years of professional experience, with a single engagement typically lasting around 3 years.
The most common languages among freelancers in Cologne, Germany who have used TCP/IP in their recent projects are German (100%), English (100%), and French (17%).
The most common industries among freelancers in Cologne, Germany who have used TCP/IP in their recent projects are Information Technology (92%), Telecommunication (58%), and Automotive (50%).
The most common business areas among freelancers in Cologne, Germany who have used TCP/IP in their recent projects are Information Technology (100%), Product Development (92%), and Project Management (75%).
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 
Frankfurt 
Stuttgart 
Dusseldorf Countries:
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FRATCH CEO
