Firewall Experts in Cologne
matched in minutes by AIHire experts who design network boundaries, tune next-generation firewall policies and connect secure access with cloud environments. FRATCH matches you quickly with vetted, available freelancers who fit your technical scope.
Meet FRATCH Experts in Cologne, who have recently used Firewall
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
Halil O.
Last position:
Senior Cloud Operations & DevSecOps Engineer (Azure / Terraform / CI-CD) at KfW Bankengruppe
Regulated environment within a German banking group (approx. 8,500 employees, hybrid cloud strategy).
Responsible for operating, provisioning, and continuously securing business-critical platforms – including a GenAI chat application, a big data/AI platform, and data science workspaces based on Azure Virtual Desktops and VMs. Ownership of Azure DevOps projects for ShaiHulud and React2Shell, as well as BSI alerts – Security Operations improvements across the SDLC.
Deployment responsibility for the GenAI chat application, big data/AI platform (BDAI), and data science workspaces (AVD/VM-based) in the respective landing zones.
Deployment & release management: end-to-end responsibility for deploying portal and service applications across multiple Azure landing zones, including technical approvals, compliance with development team deployment guidelines, and ensuring ITIL-based change and release processes via ServiceNow.
Azure landing zones & network architecture: design, provisioning, and operation of Azure landing zones for 3-tier web applications with enhanced network segmentation, VNet peering, hub-and-spoke architectures, private endpoints, and firewall integration across separate subscriptions and tenants.
Azure DevOps governance & operations: ownership of the Azure DevOps organization, including projects, repositories, and CI/CD pipelines; implementation of governance requirements such as branch policies, approval gates, permission models, and audit-ready operating structures.
Infrastructure as Code (Terraform): design, implementation, and operation of a modular Terraform architecture for standardized cloud infrastructure deployment, including state management, provider versioning, reusability, and policy-as-code approaches.
CI/CD pipeline engineering: design, operation, and optimization of complex YAML-based CI/CD pipelines with multi-stage deployments, template standardization, self-hosted agents, integrated secret management, and automated quality and security checks.
Git migration & platform consolidation: planning and execution of repository and pipeline migration from Azure DevOps to GitLab CI/CD, including automated scripts, full Git history transfer, pipeline porting, and platform consolidation.
Container & platform operations (AKS): operation and security assessment of containerized workloads on Azure Kubernetes Service, centralization of on-premises container registries for ACR.
OpenShift (OCP) security reviews: security assessment of code baselines, build pipelines, and deployment processes for on-premises OpenShift clusters with critical applications, and derivation of specific hardening recommendations.
Shift-left security & DevSecOps transformation: introduction of a company-wide shift-left approach for early security integration in development and deployment processes, enabling developers to perform self-led security checks and sustainably reduce vulnerabilities before production (IDE integrations, pre-commit hooks, local scanners).
Software supply chain security: analysis and mitigation of supply chain risks in NPM- and Yarn-based applications through dependency audits, CI/CD pipeline hardening, token rotation, and restriction of risky build and lifecycle mechanisms.
Frontend & framework security (React / Next.js): security assessment and coordination of critical vulnerability remediation across platform applications and web frameworks, including coordination and complementary technical mitigations with all teams following BSI alerts.
Software composition analysis (SCA): introduction and operation of automated vulnerability scans for container images, pipelines/artifacts, and third-party dependencies, including SBOM exports within CI/CD pipelines.
SAST/DAST integration: design and piloting of static and dynamic application security tests in close collaboration with security architecture and development teams, for continuous improvement of code and runtime security, and establishing operational acceptance tests.
Artifact & registry consolidation: analysis and consolidation of all package and container repositories for service applications and AKS workloads, aiming for a centralized, secured registry strategy with centralized vulnerability scanning and governance.
Dependency-Track & SBOM strategy: advising the compliance board on introducing a central SBOM and vulnerability management platform to increase enterprise-wide dependency transparency and accelerate CVE response capability.
CI/CD pipeline hardening: security analysis and cleanup of the existing pipeline landscape by removing unused pipelines, improving secrets hygiene, implementing least-privilege principles, and isolating build agent environments.
Azure Web Application Firewall (WAF) optimization: analysis and tuning of existing Azure WAF rules (OWASP Top 10 Core Rule Set, DSR/SDC, custom rules) to defend against known vulnerabilities and exploit patterns, including reducing false positives and improving threat detection.
Documentation & stakeholder communication: creating and maintaining technical documentation, runbooks, and architecture overviews in Jira and Confluence, as well as active knowledge transfer between operations, development, security, and compliance stakeholders.
Ralph K.
Last position:
Product Owner / Business Owner at AXIS Management Consulting GmbH
- Full product responsibility from a business perspective: requirement analysis, UX design, product strategy, and go-to-market implemented without an internal dev team using fully AI-supported development (Claude Code / Anthropic)
- Technical differentiation: KRITIS-compliant air-gapped deployment (Windows/NSIS), GDT interface for PVS integration, DATEV-LODAS export for payroll
- Managed pilot operation with initial external client (Dormagen medical practice): structured requirement gathering, test support, error analysis, and release management
- Developed rollout and sales strategy for market entry in the segment of private practices and small medical centers
- Human-in-the-Loop development principle: business decision → AI implementation → manual review → approval → release – each sprint documented in Jira (TIME project), every change traceable via co-authored commits
- Product outcome: Tauri/Rust desktop app with GDT watcher, multi-tier model (Starter/Professional/Enterprise), cloud mirror on Hetzner/Traefik, complete ISMS framework based on ISO 27001 and BSI basic protection as product foundation
- Direct method validation for the test manager role: hands-on experience with quality assurance of AI-generated products from a user perspective, review gate discipline, release approval under GDPR and the EU AI Act
Saood Y.
Last position:
Senior Application Owner at an international energy company
Further development of the application landscape for Planing, Forecasting and Pricing
Communication with internal stakeholders to standardize the application landscape across all companies
Optimization of vendor management
API and batch processing
Creation of operating concepts
Ensuring compliance with requirements and operating processes
Supporting solution design as well as the implementation and further development of new applications and services
ServiceNow
Virtual Machines (Windows / Linux)
M365 Products
Azure DevOps
Web Applications
Jens H.
Last position:
#52 Test Manager in Safety-Critical Infrastructure at Telecommunications Company
- Network elements, network, operational and operator-related systems
- Supporting around 20 different products (managed agile)
- Requirements analysis and management (functional and non-functional)
- Test concept and planning (scope, test phases, effort, schedule, resources, organization, etc.)
- Aligning approach with clients and service providers
- Managing and assisting in creation of test cases for system, integration and end-to-end tests
- Guiding and supporting test execution
- Defect management and planning bug fixes with external providers
- Preparing and facilitating workshops
- Regular reporting and creating automated test reports
- Further development of agile testing methodology and configuration of supporting tools
- Conceptual support in developing a quality seal for rating product and service quality of internal and external providers
- Requirements engineering based on ISO/IEC 25010, Scrum, SaFE
- BMC Remedy, Atlassian Confluence, Atlassian Jira (including plugins Xray, Structure), Microsoft Office (incl. Visio), Obsidian, doxis document management system, Gitlab, Obsidian
Banjika N.
Last position:
Freelance | AWS Authorized Instructor at Go Courses
- Delivered AWS-authorized content through AAI program
- Facilitated group and 1-on-1 mentorship sessions
- Coached non-technical learners into cloud career paths
- Created learning materials aligned with AWS Skill Builder and AWS Academy labs
Abdelhak M.
Last position:
Network Architect at Bechtle Managed Services GmbH
- Created as-is network documentation for a Bechtle customer
- Analyzed existing configurations and adjusted them
- Advised on Fortinet and Check Point products
- Troubleshot complex routing, switching and application issues
- Tools: MS Azure, FortiManager, Cisco Nexus & Catalyst, Cisco WLAN Controller, Citrix Netscaler SD-WAN, MS Visio, Checkpoint VSX, Wireshark
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
Phil E.
Last position:
Principal Cybersecurity Consultant at SC&E Advisory GmbH
- Development of compliance products
- Senior Cybersecurity Consultant: NIS2: impact assessment, obligations, action planning, roadmaps
- NIS2 · DORA · CRA
- Design of ISO 27001 ISMS implementation project on a fixed-price basis
- Governance consultancy in M&A situations
Jana B.
Last position:
Freelance Marketing Consultation at Lobster Data GmbH
- Conceptualization and project management of Lobster's first customer conference "Lobster Data Hero Summit".
- Leading into a unique event experience with +1,000 attendees, +45 speakers and 4 stages in only 14 weeks.
Sirak D.
Last position:
Cyber Security Support Engineer at Log(N) Pacific
- Implementing secure cloud configurations with Azure Private Link, Network Security Groups, Microsoft Defender for Cloud, and Azure Regulatory Compliance for NIST 800-53, PCI DSS, and HIPAA/HITRUST, resulting in an 88% reduction in security incidents over the same period.
- Troubleshooting and supporting Microsoft Azure services, including Microsoft Sentinel (SIEM), Virtual Machines, Azure Monitor, and Azure Active Directory.
- Developing KQL queries to support the Log Analytics workspace and Microsoft Sentinel, resulting in 1 new SIEM dashboard and 4 workbooks.
Discover over 15,000 top freelancers
Statistics of experts using Firewall
Aggregated from the professional profiles of matched freelancers.
Experience
18 years (Germany: 22 years)
Position duration
2 years (Germany: 2.2 years)
Positions per freelancer
16 (Germany: 15)
Top business areas
Information Technology, Operations, Project Management
Top industries
Information Technology, Telecommunication, Manufacturing
Certification focus areas
Information Technology, Business Intelligence, Operations
Bachelor's degree or higher
63% (Germany: 75%)
Master's degree or higher
38% (Germany: 43%)
Certifications per freelancer
8 (Germany: 5)
Most common languages
German, English, Spanish
Speak two or more languages
92% (Germany: 98%)
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 Firewall
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.
Firewall 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 (50%)
- Manufacturing (42%)
- Professional Services (42%)
- Government and Administration (42%)
- Energy (33%)
- Banking and Finance (33%)
- Food and Beverage (33%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Network protection
A firewall controls traffic between trusted and untrusted networks. It applies rules to allow, inspect, or block connections based on addresses, ports, applications, users, and content. Companies use firewalls to protect offices, data centres, cloud workloads, remote access services, and internet-facing applications.
Firewall types
Traditional network firewalls filter traffic at the perimeter, while next-generation firewalls add application awareness, intrusion prevention, identity controls, and encrypted traffic inspection. Web application firewalls protect HTTP services from threats such as injection and malicious requests. Cloud-native controls apply similar policies close to workloads and services.
Ecosystem and tooling
Strong specialists work across vendor appliances, open-source systems, and cloud security services. Their work may include:
- Designing zones, segments, routing paths, and high-availability pairs
- Building policies for VPN, NAT, web traffic, and administrative access
- Integrating identity providers, SIEM systems, endpoint controls, and threat feeds
- Managing rule changes through version control, APIs, and infrastructure as code
They also understand DNS, TLS, IP addressing, BGP, Kubernetes networking, and logging.
When companies need help
Freelance expertise is useful during a firewall replacement, cloud migration, office rollout, or security incident. It can also support policy clean-up, network segmentation, compliance preparation, and performance troubleshooting. In Cologne, specialists may collaborate with local teams on-site while handling configuration reviews and monitoring work remotely.
What strong specialists deliver
A capable professional begins with traffic flows, business requirements, and an inventory of existing rules. They create a clear policy model, remove unnecessary access, test failover, and document every change. They separate emergency controls from lasting architecture and make decisions traceable for operations and audits.
Choosing the right expertise
Look for practical experience with the exact firewall type, network scale, cloud providers, and authentication model in scope. Ask for examples of migrations, segmentation projects, incident response, and rule-base reviews rather than relying on product familiarity alone. Clear communication in English and, where needed, German helps Cologne teams coordinate changes safely. A strong specialist leaves usable documentation, repeatable procedures, and measurable monitoring signals.
Frequently asked questions
What clients ask us most about Firewall — answered in short.
A firewall controls traffic between networks, systems, and applications according to defined security rules. Companies use it to limit unauthorised access, separate sensitive environments, enable secure remote access, and record network activity.
A next-generation firewall combines basic traffic filtering with application recognition, user-based policies, intrusion prevention, and often encrypted traffic inspection. A traditional firewall mainly evaluates network and transport details such as addresses, ports, and protocols.
A firewall protects network paths and system access, while a web application firewall focuses on HTTP traffic reaching web applications. Many organisations use both because they address different layers and threat patterns.
A strong firewall specialist should understand routing, switching, VPNs, DNS, TLS, identity management, and network monitoring. Experience with cloud security groups, SIEM integration, endpoint controls, and infrastructure as code is also valuable.
The required background depends on the risk and scope of the work. A policy review may need focused operational knowledge, while a data-centre migration or segmentation programme calls for experience with architecture, failover, testing, and change control.
Yes, much firewall work can be completed remotely through controlled administration, configuration exports, documentation, and screen-based reviews. On-site support may still help with appliance installation, cabling, physical access, or coordinated maintenance windows in Cologne.
Good firewall work is least-privilege, documented, tested, and linked to clear business requirements. Ask the specialist to explain rule ownership, logging coverage, rollback steps, failover behaviour, and how they will prevent temporary access from becoming permanent.
Before working with a firewall, clarify the product or service, network boundaries, access process, maintenance windows, monitoring tools, and approval path for rule changes. Cologne projects may also require agreement on remote collaboration, on-site attendance, and communication in English or German.
The average hourly rate of freelancers in Cologne, Germany who have used Firewall in their recent projects is 112 €, which corresponds to a daily rate of about 892 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Firewall in their recent projects, 63% hold at least a Bachelor's degree and 38% hold at least a Master's degree.
On average, freelancers in Cologne, Germany who have used Firewall in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 2 years.
The most common languages among freelancers in Cologne, Germany who have used Firewall in their recent projects are German (100%), English (92%), and Spanish (17%).
The most common industries among freelancers in Cologne, Germany who have used Firewall in their recent projects are Information Technology (92%), Telecommunication (50%), and Manufacturing (42%).
The most common business areas among freelancers in Cologne, Germany who have used Firewall in their recent projects are Information Technology (92%), Operations (83%), and Project Management (83%).
Main locations of FRATCH Experts, who have recently used Firewall
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 
Dortmund 
Essen 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
