TCP/IP Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used TCP/IP
Muhammad Jamshaid Iqbal
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 Marx
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 Hefczyk
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 Karges
Last position:
Freelancer at Freelance work
- Business analysis
- Requirements management
- Project management
- Stakeholder management
- Team leadership
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
Pierre Gronau
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
Vladimir Maznicenko
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 Brungs
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 Shala
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 Pavlovic
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 and management of the migration concept
Planning and execution of migration tests
Carrying out 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 manager/technical consultant for the logistics bus
Coaching 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 for performance visibility (2022-06-01 – 2023-10-31)
Performance visibility service development, network monitoring service for Telekom internal customers
Planning/integration/expansion of PV monitoring in 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 issues
Packet capturing/debugging
Preparation of customer and training documentation
Fabian Zur Heide
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
27 years (Germany: 26 years)
Position duration
3.2 years (Germany: 3.3 years)
Positions per freelancer
22 (Germany: 19)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Telecommunication, Automotive
Certification focus areas
Information Technology, Operations, Project Management
Bachelor's degree or higher
78% (Germany: 87%)
Master's degree or higher
56% (Germany: 53%)
Doctorate
11% (Germany: 10%)
Certifications per freelancer
5 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
100% (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 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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
Network basics
TCP/IP is the core protocol suite behind most modern networks. It defines how data is addressed, routed, sent, and received across local networks and the internet. Companies use TCP/IP specialists to keep services reachable, stable, and easy to integrate.
What they handle
- IPv4 and IPv6 addressing
- Routing, subnets, and gateways
- DNS, DHCP, and port access
- Packet flow and connectivity checks
- Network behavior across servers, cloud, and office sites
Typical use cases
Strong TCP/IP work shows up in secure remote access, internal business systems, VoIP, monitoring, and hybrid cloud setups. It also matters when applications must communicate across firewalls, VPNs, or segmented networks. In Cologne, this often comes up in operations that connect office, data center, and remote teams.
Ecosystem skills
TCP/IP experts usually work with packet capture tools, firewalls, routers, switches, and Linux or Windows networking settings. They read traces, confirm handshakes, inspect headers, and adjust routes or rules. Knowledge of DNS, TLS, load balancers, and cloud networking is often part of the job.
When to bring help
Bring in freelance support when services cannot reach each other, traffic is slow, or an environment is being redesigned. The same applies during migrations, VPN rollouts, cloud moves, and incident response. Companies in Cologne often want specialists who can work remotely, then join on-site when network changes need local coordination.
What good specialists do
- Find the real cause, not just the symptom
- Explain routing, ports, and packet loss clearly
- Work well with infrastructure and application teams
- Document changes so the setup stays supportable
- Leave the network easier to operate than before
Frequently asked questions
Not sure where to start with TCP/IP? These answers cover the essentials.
A strong TCP/IP specialist helps keep systems connected across LANs, VPNs, cloud networks, and the internet. They diagnose address, routing, DNS, and firewall problems, then verify that data flows the way the application expects. This is often the fastest path when services can reach some systems but not others.
TCP/IP is the common name for the Internet protocol suite. In practice, people use it to mean the full stack of protocols that move traffic across networks, not just TCP and IP themselves. That usually includes related pieces such as UDP, ICMP, DNS, and DHCP.
Bring in TCP/IP help when network issues block a release, a migration, or a business process. It is also useful during cloud moves, VPN changes, segmentation projects, and post-incident recovery. Freelance specialists are a good fit when you need focused troubleshooting without adding a long internal ramp-up.
A good TCP/IP specialist usually understands routing, subnetting, firewalls, DNS, DHCP, and packet capture tools. Linux or Windows networking, cloud network design, and basic security knowledge are also valuable. For application-heavy environments, they should be able to talk to software teams about ports, timeouts, and connection behavior.
TCP/IP is the practical model people use to run real networks, while OSI is mainly a reference model for discussing layers. In projects, teams often use OSI terms to explain problems, but they solve them with TCP/IP tools and settings. A strong specialist should be comfortable with both ways of thinking.
The right level of TCP/IP expertise depends on the task. Basic address planning or simple connectivity checks may need only focused support, while routing redesigns, multi-site VPNs, or production outages need a deeper specialist. The key is proof of similar work, not just general networking knowledge.
Many TCP/IP tasks can be done remotely, especially analysis, configuration review, and incident troubleshooting. On-site time helps when hardware, cabling, local firewall changes, or cross-team workshops are involved. In Cologne, mixed remote and on-site collaboration is often the most practical setup.
Look for clear diagnosis steps, solid notes, and examples of fixing real network issues end to end. A strong TCP/IP freelancer should explain packet flow, identify likely root causes, and confirm the result after changes are made. Good specialists also avoid guesswork and document the network state before and after their work.
The average hourly rate of freelancers in Cologne, Germany who have used TCP/IP in their recent projects is 88 €, which corresponds to a daily rate of about 703 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used TCP/IP in their recent projects, 78% hold at least a Bachelor's degree, 56% hold at least a Master's degree, and 11% hold a doctorate.
On average, freelancers in Cologne, Germany who have used TCP/IP in their recent projects have 27 years of professional experience, with a single engagement typically lasting around 3.2 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 (18%).
The most common industries among freelancers in Cologne, Germany who have used TCP/IP in their recent projects are Information Technology (91%), Telecommunication (64%), and Automotive (55%).
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 (91%), and Operations (73%).
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 Request a free demo
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Philipp Thomaschewski
FRATCH CEO
