OSI Model Experts in Germany
matched in minutes with the power of AIWork with specialists who isolate complex networking bottlenecks across physical to application layers, design resilient communication architectures, and secure distributed infrastructure across German enterprises.
Meet FRATCH Experts in Germany, who have recently used OSI Model
Silvia B.
Last position:
Business Consultant - Product Management Banking at Aareal Bank AG
- Focus on optimizing and further developing the internal customer EBICS application
- Functional and technical consulting for Aareal First Financial Solutions AG on EBICS standard products and applications in the areas of operations and further development, as well as project-related communication with external development partners and the product manufacturer to implement the corresponding technical optimizations
- As the functional coordinator, providing advice on content-related and regulatory requirements as well as technical prerequisites and requirements, and bringing these together at the functional level
- Consulting on the use of EBICS formats
- Reviewing the current EBICS standard for optimization and further development potential
- Analyzing the current state to identify development potential and deriving appropriate recommendations for action while considering regulatory requirements
- Conducting EBICS tests throughout the project
- Functional responsibility for requirements management and, in this context, recording and documenting requirements for such tests
- Designing a functional and sustainable test management system
- Conducting and evaluating tests
- Consulting on sustainable quality assurance and audits
- Project language: German and English
- Tools/Methods: MS Project, MS Office, MS Visio, TestRail, Confluence, Jira, Business Logics Bankkrecher, Business Logics Test Data Generator, Business Logics Banking Tool, Business Logics Test System, DBEAVER, Squirrel, Unix Virtual Machines, WinSCP, Kitty, Putty, various Aareal Bank products, Online Banking Portal, Aareal Sign, core banking system, SAP Blue Eagle, SAP RE-FX, Aareon Wodis Sigma, Haufe Real Estate Wowinex, GAP Group Immotion, UTS Karthago, SAP IS-U/Waste, SIV kVASy, various EBICS clients
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.
Andreas Z.
Last position:
Transformation Architect / Business Analyst at IT Consulting
- Development of a comprehensive transformation model for IT departments and ITSM organizations, from operational stabilization through structuring and optimization to strategic advancement
- Design of a transformation matrix that connects development phases with the implementation activities Position, Focus, Model, Enable, Anchor and Develop
- Development of assessment, maturity and decision-making logic to determine the operational starting point, the appropriate entry point and the prioritized areas of action
- Structuring of an end-to-end approach from current-state assessment and target vision through operating model, roadmap and service modules to implementation and integration into steady-state operations
- Derivation of combinable consulting and implementation modules, including methods, deliverables, role models, governance structures and transformation paths
- Collection, structuring and prioritization of business requirements from the perspectives of IT management, service management and operational roles
- Translation of requirements into target visions, process and role models, decision criteria and traceable deliverables
Environment / Tools: ITIL 4, IT4IT, Operating Model Canvas, SIAM, maturity models Kanban
Andre K.
Last position:
Nearshore Engagement Manager at EnBW AG
- Building strong awareness within the company around nearshoring
- Engagement Manager in the Nearshore Competence Center
- Responsible for nearshore consulting, partner screening and technical onboarding, designing and implementing cooperation scenarios, change management, stakeholder management, participation in steering committees, and collaboration with IT and business units
- Tools used: Microsoft Office 365, Microsoft Teams, Azure Devops, Microsoft Sharepoint, Conceptboard
- Key results: Establishment of a nearshoring strategy, successful identification and implementation of outsourcing partnerships, delivery of change management and stakeholder management at the highest level
Sven R.
Last position:
Software Developer - Building Automation
- Test controller unit
- Implement test environment
- Implement virtual nodes
- Commission CANopen network
- Define and automate test cases
- Design and implement LSS state machine
- Implement data exchange between tools
- Port requirements to vTestStudio in XML format
- Products: CANoe, vTestStudio, Playwright, Cypress, Robot, .NET
- Knowledge: CAPL, C++, CANopen, concept development, Python, JavaScript, XML, C#
Christoph N.
Last position:
Project Manager at Zentraler Beitragsservice
- The goal of the project is to build a Greenfield FailSafe data center (FSRZ) as an emergency measure in accordance with BSI 200/4 against a cyberattack.
- Recovery of a project that had been running for several years. Re-initialization of the project: adjustment of the project organization, initiation of regular meetings, establishment of project controlling and project reporting, introduction of project risk management and consolidation of project documentation. Establishment of project governance and introduction of decision-making structures based on decision papers. Definition of deliverables and derivation of phase plans and the project plan. Personnel and resource planning. Coordination with “neighboring projects”, initiation of concept development and implementation. Management of the project with 8 subprojects and PMO. Budget planning and controlling (14,8 Mio). Support and coaching of the subprojects in their methodological approach. Coordination with suppliers and support of EU tenders. Coordination and processing of change requests. Coordination with line management regarding the economically viable operation of the FSRZ. Technical support for IT architecture in the areas of zOS, Windows and Linux, networking and IT security, for designing interim operations and extended regular operations for the FSRZ, planning emergency processes and emergency communication internally and externally.
Ola V.
Last position:
IT Lecturer
- IT training in theory and practice for IT specialists in application development and system integration
Luca P.
Last position:
ERP Program Manager at Fiserv
The customer is undergoing a comprehensive transformation. All SAP ECC landscapes worldwide are being migrated to SAP S/4HANA, with the goal of introducing a standard template worldwide.
The program also includes the “RISE with SAP” migration and modernization program, which may involve migrating the landscapes of selected country installations to the SAP Private Cloud.
On the stakeholder side, the program reporting line extends to the company’s executive board and that of the implementation partner.
Fiserv Germany’s ERP landscape currently includes several non-standard SAP tools and applications that extend the functionality of the ECC environment and can often be integrated into downstream systems. As part of the transition to SAP S/4HANA, it is essential to assess the core functionality, integration points and future viability of these applications in order to determine their alignment with the target architecture.
The focus of the work is on providing expert advice and assessment to define the scope, strategy and roadmap for transitioning Fiserv Germany’s SAP ECC system to SAP S/4HANA.
The recommended best practices from SAP are followed and a structured approach is used to ensure a smooth transition with minimal disruption while maximizing business value.
This assessment forms the basis for a successful SAP S/4HANA transformation and ensures alignment with industry best practices, regulatory compliance and future scalability.
Migration Strategy Definition – assessment of available transition approaches based on business objectives, technical feasibility and SAP Best Practices.
Technical Readiness Assessment – conducting a system analysis to assess compatibility, custom code impact, data volume management, integration points and infrastructure readiness for SAP S/4HANA.
Business Process Impact Analysis – reviewing the latest business process documentation to define the scope and effort required to implement the necessary functions in SAP S/4HANA and to identify opportunities for process optimization.
Roadmap for Non-SAP Systems and Applications – assessment of third-party and legacy applications regarding their integration with SAP S/4HANA and recommendation of consolidation, migration or replacement strategies.
Deployment & Implementation Planning – defining a phased approach for implementation, including project schedules, risk mitigation strategies and key milestones aligned with business priorities.
This transformation takes place in phases: the Discovery phase leads to the Explore phase, which is followed by the Design phase and finally implementation.
Program management
Change management
Requirements management
Transition management
Stakeholder management
Risk management
Comprehensive coordination
Uwe S.
Last position:
Software Developer Embedded Systems at Self-employed
Jens S.
Last position:
Network Technology at ISP, Internet Service Provider, BGP Peering
- Optimization of the transmission media of the data links in the Ruhr area
- Configuration/expansion of switches and routers for an autonomous system AS
- Improve the network protocols used Layer 2/3 (OSI model), RSTP, broadcast, etc.
- Laying cables, crimping, antennas, routers, switches
- Maintenance, expansion, selection and prioritization of troubleshooting measures for network monitoring (PRTG, The Dude)
- Organization and new connection of another BGP peering, data center, NGN fiber optic
- VPN IPSec site connections for 6 sites with PFSense, Fritzbox
- Configuration of WLAN devices (Mikrotik, UBNT
Label: TCP/IP, VLAN, BGP, OSPF, MPLS, VPLS, routing protocols, WLAN, EoIP, PPPoE, routing, SNMP, DHCP, DNS, NAT, native IP, VLAN, Ethernet, VoIP., switches and routers from: Nortel, Cisco, MikroTik, UBNT., network management systems: The Dude, PRTG, UISP
André G.
Last position:
IT Consulting Project Management / Engineering Subproject Management at T-Systems (on assignment for government agencies)
- Projects for federal networks (NdB).
- CR management, EoL change requests, design and documentation according to ITSCM.
- Data center planning.
- Project management and engineering subproject management.
- Software development for virtual server environments according to BSI.
Charles J.
Last position:
Network Architect at RedGlobal GmbH
- Configuration of Dell switches, routers, and access points.
- Troubleshooting and issue resolution.
- Extreme, Cisco and Dell switches and routers environment, Extreme A3 NAC, Extreme CloudIQ.
Dirk E.
Last position:
Senior IT Engineer at IT service provider
- Planning, concept design, re-design
- Pre-sales support
- Project support according to PRINCE2
- Setup of a CMDB
- Implementation of communication processes
Varsha S.
Last position:
Embedded Engineer (Working Student) at Lautsprecher Teufel GmbH
- Proficient in using JIRA for sprint planning, bug reporting, and task management.
- Modified and enhanced embedded C/C++ firmware code on STM32, ESP32 and ARM-based MCUs and SoCs.
- Debugged and fixed embedded software issues; managed code with Git/GitLab (commits, merge requests, reviews).
- Created and maintained test cases and test plans using Testmo.
- Debugged and validated firmware builds; provided detailed bug reports.
- Executed manual tests across development stages.
- Familiar with RTOS concepts and implementation, including task scheduling and interprocess communication for real-time embedded systems.
- Managed planning and execution of acceptance and regression testing.
- Supported mobile app and system-level testing for audio streaming device.
- Tested communication protocols (HTTP, I2C, SPI, UART) and API interactions.
- Used terminal tools and SSH to debug embedded Linux systems.
Andreas B.
Last position:
Oracle Applications DBA at Pyur
- EBS 12.1 to 12.2.11 upgrade (DB 12 to 19)
- Cloning process automation
- HTTPS migration
- Performance analysis and performance tuning
- Error analysis
- Cloning
- Patching
- Backup and recovery concept analysis and evaluation
- Disaster recovery tests
Discover over 15,000 top freelancers
Statistics of experts using OSI Model
Aggregated from the professional profiles of matched freelancers.
Experience
28 years
Position duration
2.2 years
Positions per freelancer
24
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Manufacturing, Automotive
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
87%
Master's degree or higher
47%
Certifications per freelancer
4
Most common languages
German, English, French
Speak two or more languages
100%
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 OSI Model
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.
OSI Model 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 (100%)
- Manufacturing (78%)
- Automotive (61%)
- Banking and Finance (61%)
- Government and Administration (56%)
- Telecommunication (56%)
- Education (44%)
- Aerospace and Defense (39%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Standardized Network Architecture and the Seven Layers
The Open Systems Interconnection model provides a universal conceptual framework for network communications. It divides system interactions into seven distinct layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. This structure enables clear separation of concerns across complex distributed environments.
Practical Implementation Across Protocol Stacks
While real-world infrastructure relies heavily on the TCP/IP suite, network professionals use the reference framework to diagnose protocol mismatches and enforce protocol hygiene.
- Physical and Data Link: Ethernet frames, VLAN tagging, optical transceivers, and switching logic
- Network and Transport: IP routing, BGP, OSPF, and transport flow control via TCP and UDP
- Higher Layers: TLS handshake verification, session persistence, and HTTP/2 or gRPC parsing
Core Diagnostics and Protocol Analysis Tooling
Network specialists utilize packet sniffers and traffic analyzers to inspect data encapsulation at every boundary. Tools like Wireshark and tcpdump capture raw packet flows, exposing transmission anomalies, MTU negotiation errors, and dropped frames between internal endpoints, firewalls, and cloud gateways.
Enterprise Applications in German Infrastructure
Organizations across Germany rely on layered architectural rigor within automotive testing beds, industrial manufacturing, and hybrid cloud backbones. Clear layer separation allows engineers to segment OT environments from corporate IT networks, adhering to strict industrial isolation guidelines and national data safety mandates.
When Organizations Require Freelance Specialists
Companies hire external networking professionals when cross-layer communication fails or when rolling out critical infrastructure migrations:
- Unexplained network latency spikes defying standard monitoring alerts
- Cloud migration projects requiring hybrid routing and encapsulation
- Industrial IoT rollouts connecting low-power fieldbuses to cloud platforms
- Zero-trust architecture implementation demanding strict layer boundaries
Hallmarks of Seasoned Layer Specialists
Proficient specialists look past abstract layer definitions to map physical hardware realities directly to software behavior. They demonstrate deep familiarity with modern overlay networks, such as VXLAN and IPsec tunnels, pinpointing whether an incident stems from transport-level congestion, presentation-layer encoding, or physical connectivity.
Frequently asked questions
The facts hiring teams ask for most often when it comes to OSI Model.
The OSI Model serves as a diagnostic and architectural baseline for designing and troubleshooting network systems. It allows specialists to isolate failures methodically by distinguishing hardware faults from routing, transport, or software-level communication issues.
The OSI reference model defines seven strictly divided layers, whereas TCP/IP collapses these into four operational tiers. Engineers still use the seven-layer reference because its discrete separation between session, presentation, and application tiers provides superior granularity during deep packet inspection.
An expert working with the Open Systems Interconnection concept should possess deep packet analysis capabilities using Wireshark, alongside hands-on configuration experience with switching, BGP routing, firewall inspection, and modern software-defined networking.
German manufacturing and automotive plants frequently integrate legacy operational technology with modern IP networks. A specialist proficient in the OSI Model ensures reliable protocol translation between industrial fieldbuses and enterprise cloud infrastructure while maintaining strict network segmentation.
Applying the OSI 7-layer model allows security specialists to build defense-in-depth strategies. They can place protections at each level, from MAC filtering and 802.1X at the data link layer to deep packet inspection at the application layer.
Most transport, routing, and application analysis can be handled remotely using telemetry and remote packet captures. However, engagements in Germany that involve factory floor industrial networks or data center cutovers may require short on-site visits for physical layer validation.
A seasoned OSI Model professional typically holds advanced enterprise networking certifications, demonstrates comprehensive packet-level debugging experience, and understands modern cloud virtual private clouds alongside physical hardware.
For corporate IT and cloud environments, English is standard for documentation and daily standups. In traditional Mittelstand companies or critical infrastructure projects, working proficiency in German is often requested for collaborating with on-site operations teams.
The average hourly rate of freelancers in Germany who have used OSI Model in their recent projects is 105 €, which corresponds to a daily rate of about 842 € based on an 8-hour working day.
Of the freelancers in Germany who have used OSI Model in their recent projects, 87% hold at least a Bachelor's degree and 47% hold at least a Master's degree.
On average, freelancers in Germany who have used OSI Model in their recent projects have 28 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Germany who have used OSI Model in their recent projects are German (100%), English (100%), and French (28%).
The most common industries among freelancers in Germany who have used OSI Model in their recent projects are Information Technology (100%), Manufacturing (78%), and Automotive (61%).
The most common business areas among freelancers in Germany who have used OSI Model in their recent projects are Information Technology (100%), Product Development (78%), and Project Management (78%).
Main locations of FRATCH Experts, who have recently used OSI Model
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
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
