IPv4 Experts in Germany
matched in minutes with vetted, available professionals and the power of AIHire experts who plan address spaces, configure routing and subnetting, secure network access and support IPv4-to-IPv6 transitions. FRATCH precisely matches you with vetted, available freelancers who fit your technical needs fast.
Meet FRATCH Experts in Germany, who have recently used IPv4
Markus B.
Last position:
Consultant, Technical Project Manager at Lanxess
- Project: ESU Windows and SQL Server Consolidation / Configuration Management in ServiceNow
- Prepared an as-is analysis of all servers worldwide
- Prepared an as-is analysis of all SQL servers worldwide
- Conducted requirements analyses for SQL and server migrations
- Coordinated requirements with partners for migrations to Hyper-V (on-premises) or Azure Cloud
- Facilitated regular status meetings (Jour Fixe)
- Developed roadmaps and solution models for server migrations
- Set up test scenarios
- Facilitated workshops for the rollout of a global admin team
- Designed data models (CMDB) in ServiceNow
- Led workshops for the CMDB data model
- Developed solution models for the CMDB
- Created end-to-end configuration documentation and work instructions for the CMDB
- Prepared reports for license management
- Defined KPIs for data quality in ServiceNow
- Created a service catalog
- Facilitated workshops to define service requests
- Acted as interface between requirements analysis and the 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
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
Björn A.
Last position:
Project Manager at DB InfraGO
Elevator emergency call reorganization project: Project to evaluate and define a new technical solution for connecting elevator emergency calls for all facilities of DB InfraGO passenger stations.
Objectives: Secure, redundant connection of all locations across Germany. Definition of the technical solution, documentation, subject-matter support and management of specialist and line organizations.
Identification and commissioning of technical solutions.
Management of documentation and approval of the technical solution in DB regulations.
Definition and tracking of the roadmap for describing the solution.
Preparation of a rollout plan to avoid shutdowns.
Coordination and implementation of decision proposals for steering committees.
Communication of the solution to all committees and regional areas.
Ljubomir O.
Last position:
Senior Software Test Engineer at Keil KTM GmbH
Temporary employment
- System black-box integration tests (BBIT, IVVQ): Execution of regression, release, confirmation and conformity tests for safety-critical braking control units in the railway 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 conformity with 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 and 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 adjustment 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): Work 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 levels (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
Matthias S.
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
Marcus B.
Last position:
Java and Quarkus Expert at Large German energy service provider
- Modernization of a large-scale Java enterprise application*
The project is modernizing a complex enterprise application that has grown over many years. The existing Spring-based legacy system runs on Java 8, OSGi, and Eclipse RCP and is being gradually migrated to a modern, maintainable architecture with Java 25 and Quarkus.
Marcus works on analysis, architecture, refactoring, and implementation. One focus is on untangling historically grown structures and dependencies and on building a clean, sustainable Java and Quarkus technology stack.
Tools & technologies: Java 8, Java 25, Quarkus, Hibernate ORM with Panache, EclipseLink, OSGi, Eclipse RCP, Maven, JUnit, Mockito, REST, JSON, Git, Eclipse IDE, IntelliJ IDEA Ultimate, Jira, Confluence
Florian K.
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
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
Maher S.
Last position:
Product Development – Test Management – Rollout at Telefónica Deutschland
Participation in various projects related to the development and introduction of new telecommunications products in the mobile communications and fixed-line sectors, with a focus on 5G, wholesale and IPv6 technologies.
- Planning, coordination and execution of product development projects, particularly in the 5G and fixed-line environments
- Support for the rollout of new offerings, including test management and quality assurance
- Participation in the development of wholesale products and eSIM solutions
- Close coordination with internal departments (technology, marketing, operations) and external partners
- Use of agile tools and methods for project management and collaboration
Tools: JIRA, MS Office, MS Project
Technologies: 5G, 5G Campus Networks, Fixed Network (FixNet), IPv6, eSIM, Wholesale product development
CS-APN 5G NSA – IPv6 / Dual-Stack for B2B Customers
Ensuring the use of CS-APNs in dual-stack mode (IPv4/IPv6) in combination with MPLS VPN and IPSEC VPN.
- Project management including test planning, test coordination and go-live management
- Technical coordination for activating IPv6 functionality for B2B connections
eSIM Manager – Product Development for B2B Customers
Development of a tool for the fast and scalable provision of eSIM profiles for business customers.
- Product design and process definition for activating eSIMs on different device types (smartphones, IoT, laptops)
- Collaboration with partners to integrate the solution into existing infrastructures
eSIM Handling B2B – Blanco eSIM Process Integration
Optimization of the eSIM provisioning process through the introduction of dynamic Blanco eSIM processes.
- Definition of new processes for issuing non-activated eSIMs (Blanco) via the frontend and partner community
- Design of the integration into service and IT systems
All-IP 5G NSA – Mobile Access for B2B Internet/Voice Services
Expansion of the All-IP portfolio with mobile 5G access offering higher bandwidth for business customers. (5G Indoor Coverage).
- Project management including test management and go-live preparation
- Interface coordination for introducing Local-SIM-based solutions
5G PN – Campus Roaming / Private Networks
Development and introduction of 5G Private Network (PN) solutions with a focus on industrial applications (IIoT).
- Design and definition of business use cases
- Development of SIM/eSIM processes for 5GPN, including roaming between private and public networks
IPv6 for B2B – Introduction in Mobile and Fixed-Line Products
Introduction of IPv6 support for All-IP products and M2M services in the B2B environment.
- Product and process development for integrating IPv6 (in accordance with RIPE-554)
- Implementation for large customers such as retail chains with several thousand branches in Germany and abroad
Ulf H.
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
Christian E.
Last position:
IT Consulting / IT Rebuild at IT Rebuild (PF)
- Analysis of requirements and the current situation
- Migration of an old domain structure and Tobit to Exchange 2019 with connection to MS365
- Review of implementation options and planning for the protection of sensitive data
- Planning with regard to BSI Grundschutz, BDSG, and DSGVO
- 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 policies (GPO), SIEM, remote work, home office, high availability, failover, VLAN, PRTG
Uwe S.
Last position:
Software Developer Embedded Systems at Self-employed
Nicole F.
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
Minh Duc V.
Last position:
Senior System Engineer Network & Security at F.S. Fehrer GmbH & Co. KG
- Responsible for the configuration, maintenance, monitoring, troubleshooting, and optimization of the IT infrastructure, including Extreme Networks, SD-WAN, and Fortinet security solutions, at all international company locations in Europe and North America
- Development of a comprehensive strategic roadmap to optimize the network architecture, including VLANS, NAC, QoS, firewall configurations, VPNs, DPI, NGFW, threat intelligence, and SSL/TLS inspection
- Implementation of the OneIT strategy through the introduction of new technologies such as Cisco DNA Center, ExtremeCloud IQ, FortiOS, FortiManager, and FortiAnalyzer, which increased employee skills and the efficiency of the IT systems
- Integration of IT and OT systems to optimize the network and security architecture and improve operational efficiency
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, Quality Assurance
Top industries
Information Technology, Manufacturing, Telecommunication
Certification focus areas
Information Technology, Quality Assurance, Project Management
Bachelor's degree or higher
72%
Master's degree or higher
56%
Doctorate
6%
Certifications per freelancer
5
Most common languages
German, English, Spanish
Speak two or more languages
96%
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 Germany 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 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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
IPv4 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 (96%)
- Manufacturing (65%)
- Telecommunication (58%)
- Automotive (46%)
- Healthcare (46%)
- Banking and Finance (42%)
- Insurance (35%)
- Government and Administration (35%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Addressing basics
IPv4 is the Internet Protocol version used to identify devices and route packets across local and wide area networks. It uses 32-bit addresses, commonly written in dotted-decimal notation, and relies on subnetting, routing tables and gateways to move traffic between networks. Companies use it in office networks, data centers, cloud environments, industrial systems and Internet-facing services.
Network design
Effective IPv4 work starts with a clear address plan. Specialists divide networks into suitable subnets, reserve ranges for infrastructure, define gateway paths and prevent overlapping private address spaces. They also account for DHCP, DNS, NAT, VLANs, VPNs and firewall zones so that the design remains manageable as sites, users and workloads change.
Routing and tools
IPv4 environments often combine switches, routers, firewalls, operating systems and cloud networking services. Relevant work may include static routes, OSPF or BGP, DHCP scopes, access control lists, NAT policies and packet analysis with tools such as Wireshark. Strong professionals understand how these components interact rather than treating addressing as an isolated configuration task.
Typical projects
- Design or revise an IPv4 address and subnetting scheme
- Connect offices, data centers, cloud networks or production sites
- Troubleshoot duplicate addresses, routing failures and unreachable services
- Configure DHCP, NAT, VLANs, VPNs and firewall rules
- Prepare a controlled migration from IPv4 to IPv6
When to bring expertise
Companies typically seek freelance support during network expansion, cloud migration, acquisitions, infrastructure consolidation or serious connectivity incidents. In Germany, professionals may need to coordinate with distributed teams, local operations and regulated industries while balancing remote work with on-site access to physical equipment. Clear documentation is essential when external specialists hand over address plans, diagrams and operating procedures.
Quality signals
A strong IPv4 professional can explain why an address plan fits the traffic, security and growth requirements instead of simply assigning addresses. Look for practical knowledge of CIDR, private and public ranges, routing, NAT, DNS, DHCP, monitoring and IPv6 coexistence. Careful specialists test changes, document dependencies, limit disruption and leave repeatable configurations that internal teams can maintain.
Frequently asked questions
Everything clients usually want to know about IPv4, in one place.
IPv4 provides addressing and packet routing for devices, services and network segments. Companies use it across offices, data centers, cloud workloads, industrial environments and public-facing systems, often together with NAT when private networks access the Internet.
IPv4 uses 32-bit addresses and is supported by nearly every network environment, but address scarcity often requires NAT and careful planning. IPv6 offers a much larger address space, yet many organizations still need dual-stack operation, translation or staged migration because existing systems depend on IPv4.
A capable IPv4 specialist should also understand subnetting, CIDR, routing protocols, DNS, DHCP, VLANs, VPNs, firewalls and network monitoring. Cloud networking and IPv6 knowledge are valuable when infrastructure spans providers, offices and data centers.
The right level depends on the risk and scope of the work. A small subnetting task may need focused configuration experience, while a multi-site redesign calls for a IPv4 professional who can assess dependencies, plan migration steps, test changes and document the result.
Many IPv4 tasks can be completed remotely through secure access to routers, firewalls, cloud consoles and monitoring systems. On-site work may still be needed for cabling, hardware replacement or restricted environments, so access rules, German or English communication and maintenance windows should be agreed early.
Bring in an IPv4 freelancer when address conflicts persist, a network is expanding, sites are being connected, cloud resources are moving or an IPv6 transition needs a practical coexistence plan. External expertise is also useful when internal teams lack time for design documentation and controlled implementation.
Ask the IPv4 professional to explain the address plan, routing decisions, failure scenarios and rollback steps in clear terms. Quality work includes tested configurations, accurate diagrams, security boundaries, monitoring recommendations and documentation that another specialist can operate.
A IPv4 freelancer should confirm the current topology, address inventory, routing protocols, security controls, cloud connections and change process. In Germany, it is also important to clarify remote access, on-site requirements, language expectations and whether the assignment includes IPv6 planning or only existing IPv4 operations.
The average hourly rate of freelancers in Germany who have used IPv4 in their recent projects is 105 €, which corresponds to a daily rate of about 840 € based on an 8-hour working day.
Of the freelancers in Germany who have used IPv4 in their recent projects, 72% hold at least a Bachelor's degree, 56% hold at least a Master's degree, and 6% 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 Spanish (12%).
The most common industries among freelancers in Germany who have used IPv4 in their recent projects are Information Technology (96%), Manufacturing (65%), and Telecommunication (58%).
The most common business areas among freelancers in Germany who have used IPv4 in their recent projects are Information Technology (100%), Project Management (73%), and Quality Assurance (65%).
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 
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