TCP/IP Experts in Cologne
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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
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
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
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
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
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
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: 55%)
Doctorate
10% (Germany: 11%)
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 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Cologne 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 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 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 (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
Internet foundation
TCP/IP is the core protocol suite behind communication across private networks and the internet. Transmission Control Protocol provides reliable, ordered delivery, while Internet Protocol addresses and routes packets between systems. Together, these protocols support web services, APIs, email, cloud workloads and connected devices.
Protocol layers
The suite covers more than TCP and IP alone. Strong specialists understand DNS for name resolution, DHCP for network configuration, ARP for local delivery, ICMP for diagnostics, and HTTP, TLS, SSH and SMTP at higher layers. They connect these protocols to operating systems, firewalls, load balancers and application services.
Practical delivery
TCP/IP expertise appears in projects that require stable communication between users, services and sites:
- Plan subnets, address spaces and routing paths
- Configure VLANs, gateways, firewalls and VPN connections
- Diagnose packet loss, latency, MTU and connection failures
- Secure traffic with segmentation, filtering and encryption
- Connect cloud networks with on-premises environments
When specialists help
Companies often bring in freelance professionals during migrations, outages, acquisitions or major infrastructure changes. They can review an existing design, isolate the source of intermittent failures, prepare a clear network plan or support a live cutover. In Cologne, this expertise can support local business, logistics, media and industrial environments while still fitting remote collaboration with distributed teams.
Tools and adjacent skills
Effective work with TCP/IP includes packet analysis with Wireshark and tcpdump, command-line diagnostics, routing and firewall configuration, and monitoring of traffic and service health. Useful adjacent knowledge includes Linux or Windows networking, cloud services, Kubernetes networking, infrastructure as code, DNS management and security controls. Clear documentation makes complex paths easier to operate.
What quality looks like
Strong professionals explain network behaviour from packet flow to application impact. They test assumptions, reproduce faults, measure before changing settings and separate symptoms from root causes. Look for experience with the relevant vendors and cloud environments, disciplined change management, useful diagrams and concise incident reports. Cologne-based teams should also agree early on language, access procedures and whether site visits are needed.
Frequently asked questions
Not sure where to start with TCP/IP? These answers cover the essentials.
TCP/IP enables devices, applications and networks to exchange data. It supports services such as websites, APIs, email, remote access, cloud connectivity and communication between industrial or connected devices.
TCP/IP commonly uses TCP when data must arrive reliably and in order. UDP avoids some of TCP’s overhead and can suit streaming, voice, gaming or DNS, where speed and application-level handling matter more than guaranteed delivery.
A strong TCP/IP specialist often works with DNS, DHCP, routing, VLANs, firewalls and VPNs. Experience with Linux or Windows, cloud networking, Kubernetes, Wireshark and security practices is valuable when the work spans several layers.
The right level depends on the risk and scope of the work. A focused configuration or diagnostic task may need targeted expertise, while a migration, redesign or recurring outage calls for a professional who can analyse architecture, lead changes and document operational decisions.
TCP/IP work is often suitable for remote collaboration through secure access, monitoring data, diagrams and scheduled troubleshooting sessions. On-site support in Cologne may still help with cabling, hardware, data-centre changes or incidents that cannot be safely handled remotely.
Ask the professional to describe a comparable network problem and the evidence used to find its cause. Review their approach to packet captures, routing tables, firewall rules, testing, rollback plans and documentation rather than relying only on tool names.
A TCP/IP freelancer may deliver network diagrams, address and subnet plans, routing or firewall specifications, monitoring recommendations and incident findings. For a migration, useful outputs also include a tested change plan, rollback procedure and handover documentation.
TCP/IP remains the basic communication layer used by cloud services, containers, virtual machines and enterprise applications. Abstractions such as software-defined networks change how it is configured, but specialists still need to understand addressing, routing, transport behaviour and security.
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 743 € 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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