IPv4 Experts in Germany
in minutes from over 15,000 CVs with the power of AI.Hire experts who plan IPv4 addressing, design subnets and NAT, and support routing, DHCP, and legacy network migrations. Get fast, precise matching with vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used IPv4
Matthias Spiller
Last position:
Software Developer and Consultant at CLADE GmbH
- Analysis of the existing CAN communication between microcontrollers
- Analysis of the sensors used and the measured values collected
- Planning the CAN messages for transmitting the measured values
- Iterative adjustment of the microcontroller code to the new CAN messages
- Cross-compilation from x64 to arm64
Markus Blohm
Last position:
Consultant, Technical Project Manager at Lanxess
- Project: ESU Windows and SQL Server consolidation / Configuration Management in ServiceNow
- Creation of an as-is analysis of all servers worldwide
- Creation of an as-is analysis of all SQL servers worldwide
- Creation of requirements analyses for SQL and server migrations
- Coordination of requirements with partners for migrations to Hyper-V (on-premises) or Azure Cloud
- Moderation of jour fixe meetings
- Creation of roadmaps and solution models for server migrations
- Setup of test scenarios
- Moderation of workshops for the introduction of a Global Admin Team
- Creation of data models (CMDB) in ServiceNow
- Conducting workshops for the CMDB data model
- Creation of solution models for the CMDB
- Creation of seamless configuration and work documentation for the CMDB
- Creation of reports for license management
- Creation of KPIs for data quality in ServiceNow
- Creation of a service catalog
- Moderation of workshops for creating service requests
- Interface between needs analysis and ServiceNow development team
- Systems used: Windows 7, Windows 10, Microsoft Office 365/2010, Windows Server 20xx, SQL Server 20xx, SharePoint, Azure Cloud, Hyper-V, ServiceNow, various tools
Ljubomir Obrenovic
Last position:
Senior Software Test Engineer at Keil KTM GmbH
Temporary employment
- System black-box integration tests (BBIT, IVVQ): Execution of regression, release, acceptance, and compliance tests for safety-critical brake control units in the rail industry
- Software test application & integration: Runtime configuration of software components and libraries, validation of interfaces, configuration dependencies, and component interactions
- Test automation (FEAT framework): Co-development and further development of an automated test framework for test execution, reporting, and result analysis
- Functional safety (SiL4, FuSi): Ensuring compliance with safety requirements, traceability and coverage, as well as standards compliance according to EN50126/28/29
- Test automation for communication components: Configuration and validation of fieldbus (CAN) and Ethernet-based TCMS data communication interfaces (TRDP and CIP)
- Requirements analysis & shift-left (PTC Windchill ALM): Analysis of software and system artifacts to identify gaps, ambiguities, and redundancies early in the SDLC
- Test design & test case development: Derivation of test conditions, coverage strategies, and implementation of data-driven test cases (DDT), including reusable test data fixtures
- CI/CD & automation (Python, PowerShell, Jenkins, SVN): Automation of build, test, and HIL deployment processes as well as integration into CI/CD pipelines
- Test data & configuration management (XML): Maintenance and adaptation of XML test vectors and system configurations with automated integration into test environments
- Non-functional testing: Execution of performance and load tests to assess stability and system behavior
- Agile development & defect management (JIRA, Confluence): Participation in Scrum teams, test coordination, review of test artifacts, as well as defect tracking and root-cause analysis
- Error analysis & debugging (CANoe, CANalyzer): Analysis of errors and message flows across multiple system layers (application to bus)
- Model-based analysis (UML, Enterprise Architect): Specification of SUT/SOW and support for systematic test control
- Process & test documentation: Creation of integration and test documentation according to internal quality and certification requirements
Christian Enderle
Last position:
IT Consulting / IT Rebuild at IT-Neuaufbau (PF)
- Analysis of requirements and the current situation
- Migration of an old domain structure and Tobit to Exchange 2019 with integration to MS365
- Evaluation of implementation paths and planning for securing sensitive data
- Planning regarding BSI basic protection, the German Federal Data Protection Act (BDSG), and GDPR
- IT governance and IT security backtests
- Support with ERP setup and securing mail transfer
- Hyper-V 2016/2022, Microsoft Terminal Services Cluster, Microsoft Exchange 2019
- Office 365, Microsoft 365, Azure AD, Teams, Salesforce
- Cisco, Zyxel, and HP switches, Sophos firewalls/UTMs, SecurePoint
- Microsoft IIS 2022, IPv4/IPv6, Veeam, Wortmann online backup, NextCloud
- Services: DNS, DHCP, TCP/IP, subnetting, firewalling, routing, VoIP, Group Policy (GPO), SIEM, remote work, home office, high availability, failover, VLAN, PRTG
Florian Krebs
Last position:
LAN Planner at Global Network AG
- As-is assessment of the current network infrastructure and its documentation, including on-site inspections
- Independent planning of new distribution and main distribution rooms in the individual district offices (components used, rack layout, connectivity), considering the BSI IT-Grundschutz and InfoSic requirements
- Planning of new copper and fiber optic cabling, including patch panels
- Coordination with building services engineering (TGA) to ensure compliance with relevant on-site requirements
- Development of detailed execution plans and high-level concepts for the rollout of the new infrastructure
- Additional support after the components go live (hypercare phase)
- Regular communication with project management and client stakeholders
Ulf Haase
Last position:
Configuration Manager (Interim) at In-house Development
- Requirements analysis and replacement of local SharePoint as CMDB with open source NetBox to prepare for deploying Cisco ACI (SD-WAN) with Microsoft Azure
- Coordination with systems like Checkmk and Grasp
- Introduction and coordination of cmdbsyncer as CMDB data hub; further development of the syncer with Kuhn & Ruess GmbH
- Implementation of SNMPv3 on AIX LPAR/VIO, Linux, Windows, SAN/storage, network components (Cisco switches, F5 load balancers, Palo Alto and CheckPoint firewalls, iLO boards)
- Deployment and further development of the network scanner JDisc in cooperation with the vendor (Utimaco HSMs, Linux detection)
- Integration of NetBox, JDisc, and cmdbsyncer into the infrastructure using Docker containers
- End-user training: preparation, creation of materials, and delivery
- Creation of data flow and network diagrams
- Population and planning of IPv4/IPv6 with NetBox including VLAN import
- Dual-stack setup of servers and clients with IPv4 and IPv6
- Connection of REST interfaces for Checkmk, JDisc, vSphere, HMC, i-doit, NetBox Software: Confluence, Jira, MS Office 365, Teams, i-doit, NetBox, JDisc, cmdbsyncer, DB Visualizer, vSphere, HMC
Nicole Fotso
Last position:
SAP FI Consultant & Test at DZB Bank
- Analysis and optimization of business processes in financial accounting
- Customizing in SAP FI (e.g. company codes, chart of accounts, payments)
- Integration with other modules such as CO, MM, SD
- Consulting on legal requirements (e.g. GoBD, UStG)
- Support with month-end and year-end closing
- Creation of test plans (system test, integration test, UAT)
- Definition of test cases (e.g. postings, payment runs, dunning runs)
- Selection of suitable test data and scenarios
- Manual testing of posting processes (e.g. customer invoice, payment run)
- Validation of automatic postings (e.g. for MM credit memo)
- Checking interfaces (e.g. to subsystems or non-SAP solutions)
- Documentation of defects in the test tool (e.g. Jira, ALM)
- Analysis and feedback to developers or the customizing team
- Retest after bug fixes
- E2E tests with SAP Solution Manager (SOLMAN)
- Use of tools such as SAP CBTA or Micro Focus UFT
Konstantinos Metaxas
Last position:
IT-Fly Specialist – Global Rollout at Lufthansa Group
Plan & Prepare (Site Design & Readiness): Inventory & Design: Dell PowerEdge R-Series, Aruba switches (L2/L3), notebooks/peripherals; serials/asset tags, IPv4/IPv6 addressing, VLAN-/DHCP-/DNS plan
Runbooks/MOPs: site rollout runbook, backout strategy (<15–30 min), risk register, communication matrix; approvals via CAB/change
Images/Packages: Golden Image (Win10/11), driver packs, BIOS/UEFI baseline; O365/Teams/OneDrive KFM; BitLocker policies; MECM/SCCM, Intune/Autopilot, MDT/WinPE
Logistics: shipping/customs clearance, RMA/DOA, on-site spares; tools (barcode scanner, label printer), "Go-Bag" (cables, SFPs, console cables)
Deliver (on-site implementation): End devices: swap & migration (USMT/OneDrive KFM), peripherals (ATB/BT printers, scanners, boarding gate hardware); domain join, compliance checks, O365 activation, printers/queues, network drives
Acceptance: functional tests for DCS/CUTE/CUPPS/CUSS stations, ticketing/check-in workflows, boarding gates
Server (R-Series): rack & stack, cabling (PDU redundancy, fiber/copper), labeling/naming; firmware/RAID (PERC), Lifecycle Controller, iDRAC network; Windows Server 2022/2025 + CIS/BSI hardening; agents (backup/AV/EDR/monitoring), time service/NTP auth, Syslog/SNMPv3
Network (Aruba): VLANs, LACP trunks, MSTP root; PortFast + BPDU Guard at the edge; QoS (EF/AF); dual stack (v4/v6), DHCP relay. NAC/802.1X with ClearPass/Radius/TACACS+, roles + MAB fallback; guest isolation, ACLs (Guest→Mgmt deny). Telemetry: sFlow, SNMPv3, Syslog→SIEM; LLDP→inventory/CMDB
Airport specifics: CUTE/CUPPS/CUSS terminals; DCS/Amadeus/SITA connectivity; FIDS (read-only); bag tag/boarding pass printing; changes in off-peak/night windows
Stabilize (hypercare): first-day support, KPI tracking (login times, ticket volume, error classes), QoS fine-tuning
Troubleshooting: Wireshark/iperf, event logs, switch counters, sFlow flows; fast incident handling as SPOC
Knowledge transfer: short training sessions for station teams, mini-runbooks (fault/recovery)
Close (documentation & handover): docs & CMDB: final configs (switch/server), topology/patch plans, IP tables, serial/asset lists, before/after photos
Acceptance & sign-off: UAT protocols, functional evidence (use cases), return/reuse of old hardware
Lessons learned: risks, standard packages, driver freeze, "known issues"
Interfaces/communication: station IT, airport IT, SOC/NOC, ground ops/ramp/check-in, provider (SITA/Amadeus). ITSM: ServiceNow (Inc/Req/Change/KB), handover to BAU
Tom Heinrich
Last position:
Network Architect / System Engineer at Teleperformance
Professional focus: Fortinet rollout / site standardization / cloud / ISP migration
- Network analysis, design and optimization, change
- ISP changes
- Commissioning of service providers and decentralized IT support teams
- Setting up a central management platform
- Routing optimization for dynamic routing
- Optimizing and creating firewall rules
- AWS connection / design
- MS Azure connection / design
Technologies / tools: Fortigate, Palo Alto, WAN, SDN WAN, VPN, BGP, OSFP, Fortimanager, Panorama, Meraki, Alcatel, AWS, MS Azure, Network Architecture
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
Björn Auel
Last position:
Project Manager at DB InfraGO
Project Elevator Emergency Call Reorganization: Project to evaluate and define a new technical solution for connecting elevator emergency calls across all DB InfraGO passenger station facilities.
Objectives: Secure redundant connectivity for all sites nationwide. Define the technical solution, document it, and provide thematic oversight and control of specialist and line organizations.
Identify and commission the technical solutions.
Manage the documentation and approval of the technical solution within DB regulations.
Define and follow up on the roadmap for the solution description.
Develop a rollout plan to prevent shutdowns.
Prepare, align, and implement decision proposals for steering committees.
Communicate the solution in all committees and regional departments.
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
Minh Duc Vu
Last position:
Senior System Engineer Network & Security at F.S. Fehrer GmbH & Co. KG
- Responsible for configuring, maintaining, monitoring, troubleshooting, and optimizing the IT infrastructure, including Extreme Networks, SD-WAN, and Fortinet security solutions, at all international company locations in Europe and North America
- Developed a comprehensive strategic roadmap to optimize network architecture, including VLANs, NAC, QoS, firewall configurations, VPNs, DPI, NGFW, threat intelligence, and SSL/TLS inspection
- Implemented the OneIT strategy by introducing new technologies such as Cisco DNA Center, ExtremeCloud IQ, FortiOS, FortiManager, and FortiAnalyzer, boosting staff expertise and IT system efficiency
- Integrated IT and OT systems to optimize network and security architecture and improve operational efficiency
Rick Grassmann
Last position:
Interim IT Security Analyst at GLS IT Services GmbH
- Risk Management
- Incident Management
- Security Analysis
- Secure Coding
- Information Security Management System (ISMS)
Marco Fischer
Last position:
System Engineer–Vmware, Veeam at DCSO
- About 800 different server VMs, operation and lifecycle/asset management of about 40 ESXi hosts (Lenovo)
- Upgrade of all clusters to ESXi/VCSA 7.0U3 and 8. Planning patch management for all hosts
- Cleaning up the AD – many different domains that all needed to be migrated into the main environment. Planning/execution
- Veeam – check the configuration and migrate to a newer, partly virtual infrastructure to make the setup leaner and faster
- VMware – upgrades/updates, general maintenance
- Proxmox POC – evaluate if an alternative to VMware
- Documentation for Veeam/VMware/storage
- Implementation of the uniflow cloud solution
- NetApp migration to new storage, CIFS maintenance and administration of SVMs
Discover over 15,000 top freelancers
Statistics of experts using IPv4
Aggregated from the professional profiles of matched freelancers.
Experience
21 years
Position duration
2 years
Positions per freelancer
17
Top business areas
Information Technology, Project Management, Operations
Top industries
Information Technology, Manufacturing, Telecommunication
Certification focus areas
Information Technology, Quality Assurance, Project Management
Bachelor's degree or higher
73%
Master's degree or higher
53%
Doctorate
7%
Certifications per freelancer
5
Most common languages
German, English, French
Speak two or more languages
96%
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 Germany 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 Germany using IPv4
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
IPv4 basics
IPv4 is the core addressing scheme behind most IP networks. It assigns 32-bit addresses to devices, routers, servers, and services so traffic can move across LANs, WANs, VPNs, and internet-facing systems.
Where it is used
It still sits at the center of daily network work:
- Address plans for offices, data centers, and cloud links
- Subnetting, routing, and access control design
- NAT for public-to-private traffic flow
- DHCP scopes and static address management
- Legacy system support during IPv6 transition projects
Ecosystem and tools
Strong IPv4 specialists work across routing stacks, firewalls, switches, load balancers, DNS, and DHCP services. They know how IPv4 interacts with VLANs, VPNs, proxy layers, and cloud networking, and they can read packet traces, routing tables, and ACL rules without guesswork.
When companies bring in help
Companies hire freelance IPv4 experts when networks are being restructured, merged, or cleaned up. Typical work includes renumbering, fixing overlaps, resolving routing issues, tightening NAT rules, and documenting address ownership. In Germany, this often matters for distributed operations where local offices, remote teams, and external providers must stay aligned.
What strong experts deliver
Good professionals do more than assign addresses. They map dependencies, avoid conflicts, keep broadcast domains under control, and make sure services still resolve and route correctly after changes. They also leave clear documentation so operations teams can maintain the design.
Signs you need a specialist
- IP conflicts or duplicate ranges appear
- NAT, VPN, or firewall rules break connectivity
- A merger or site move requires renumbering
- IPv4 and IPv6 must coexist cleanly
- Documentation no longer matches the live network
Frequently asked questions
Everything clients usually want to know about IPv4, in one place.
A strong IPv4 specialist helps define address ranges, subnets, and routing paths so devices can communicate reliably. They also handle NAT, DHCP, and firewall-related changes when networks grow or move.
IPv4 is the older addressing model and is still widely used for day-to-day network connectivity. IPv6 is usually added for expansion and long-term planning, but many systems still depend on IPv4 for routing, NAT, and service access.
A good IPv4 freelancer usually understands routing, subnetting, DNS, DHCP, firewalls, and VPNs. In larger environments, they also need practical knowledge of switches, load balancers, and cloud networking.
You usually bring in IPv4 expertise during migrations, office moves, network cleanups, or incident recovery. It is also useful when address plans are unclear, overlaps exist, or different teams have changed the network over time.
Most IPv4 tasks can be done remotely if the specialist has access to diagrams, configs, and change windows. On-site work helps when physical network gear, local office cutovers, or hands-on coordination with internal teams is involved.
Look for a IPv4 specialist who explains address design clearly, documents changes, and understands the impact on routing and security. Strong experts reduce risk, avoid overlapping ranges, and leave the network easier to maintain.
Yes, IPv4 remains important in cloud, hybrid, and on-prem environments because many services, tools, and integrations still rely on it. Even when IPv6 is present, IPv4 often carries the main production traffic and needs careful management.
Typical IPv4 deliverables include address plans, subnet maps, NAT rules, DHCP scope definitions, routing notes, and updated network documentation. For larger changes, a specialist may also provide migration steps and rollback guidance.
The average hourly rate of freelancers in Germany who have used IPv4 in their recent projects is 103 €, which corresponds to a daily rate of about 826 € based on an 8-hour working day.
Of the freelancers in Germany who have used IPv4 in their recent projects, 73% hold at least a Bachelor's degree, 53% hold at least a Master's degree, and 7% hold a doctorate.
On average, freelancers in Germany who have used IPv4 in their recent projects have 21 years of professional experience, with a single engagement typically lasting around 2 years.
The most common languages among freelancers in Germany who have used IPv4 in their recent projects are German (100%), English (96%), and French (13%).
The most common industries among freelancers in Germany who have used IPv4 in their recent projects are Information Technology (96%), Manufacturing (70%), and Telecommunication (57%).
The most common business areas among freelancers in Germany who have used IPv4 in their recent projects are Information Technology (100%), Project Management (74%), and Operations (70%).
Main locations of FRATCH Experts, who have recently used IPv4
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 Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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FRATCH CEO
