Debian Experts in Cologne
matched in minutes from over 15,000 CVsHire experts who manage Debian servers, automate Linux operations and secure production environments across cloud, web and enterprise systems. FRATCH matches you precisely with vetted, available freelancers who can start quickly.
Meet FRATCH Experts in Cologne, who have recently used Debian
Matthias S.
Last position:
Overall Project Coordinator at Bundeswehr Informatik (BWI GmbH)
- PMO Lead Security Clearance 2 (SÜ2) verified
- Reporting to the GMN sub-program management
- System maintenance 25+
- Functional management and coordination of the Jira setup
- Preparation of decision papers (e.g. project planning, governance model, communication plans, controlling models, roles and responsibilities matrices)
- Development of program-wide knowledge management using Confluence, creation of Jira concept
- Development of an access concept for all project tools
- Analysis of existing processes, identification of improvement potential, and design of solutions to increase efficiency and effectiveness
- Development of a concept for introducing automation approaches into existing tools
- Creation of intranet articles for project marketing
- Responsible for project governance through reporting and resource planning in the sub-program
- Agile development of the project methodology
- Gathering customer requirements (Requirements Engineering)
- Preparation and support of contract negotiations (7-year term, 500+ million budget)
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
Markus B.
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
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
René K.
Last position:
Freelancer at Freelance work
- Business analysis
- Requirements management
- Project management
- Stakeholder management
- Team leadership
Andreas K.
Last position:
Backend Developer at Univention GmbH
- Developed a SCIM-compliant Python interface to connect external systems
- Expanded and enhanced UCS modules in Python
- Extended and newly developed Helm charts for container orchestration in Kubernetes
- Maintained and further developed CI/CD pipelines in GitLab
- Implemented automated tests with Pytest and Playwright
'Nubus' is based on a microservice architecture, relies on open source technologies, and runs in Docker containers.
UCS is an IAM complete solution based on Debian, used as an alternative to Microsoft's Active Directory. The work was characterized by the close integration of infrastructure and application logic.
Alexander V.
Last position:
Senior DevOps / Platform Engineer at Kaufland e-commerce / real.digital (ex hitmeister.de)
- Evolved the platform from bare-metal infrastructure with a monolithic PHP application to a hybrid Google Cloud architecture with Go microservices on Kubernetes
- Managed and scaled a production infrastructure with 300+ VMs and dozens of clusters, including MySQL, PostgreSQL, MongoDB, RabbitMQ, Redis and Elasticsearch clusters
- Designed architecture, deployment, monitoring, performance analysis, and upgrades for all platform services using Terraform and Ansible
- Migrated observability systems from ELK and Prometheus to Datadog, managed with Terraform
- Introduced Jenkins CI/CD with SonarQube integration and automated tests to speed up feedback cycles
- Containerized the testing environment and implemented GitLab CI pipelines for Docker image builds, static code analysis, and infrastructure tests
- Performed zero-downtime migrations of MySQL and MongoDB clusters to Google Cloud
- Developed reusable Ansible roles for database clusters and automated data obfuscation for staging environments
- Decomposed monolithic databases and migrated to microservice architectures
- Built tools to detect and optimize slow queries in MySQL and MongoDB
- Conducted online schema migrations with pt-online-schema-change without downtime windows
- Developed internal Go applications for batch queries, GitLab-Jira integration, and MongoDB backup recovery
- Technologies: Debian, Ubuntu, Alpine, Go, Bash, Python, PHP, SQL, GitLab CI, Jenkins, Drone CI, MySQL, MongoDB, PostgreSQL, Redis, Elasticsearch, RabbitMQ, Kafka, Docker, Kubernetes, Nomad, Ansible, Terraform, Grafana, ELK, Prometheus, Datadog, Nagios, Zabbix, Nginx, HAProxy, Vault, Helm, SonarQube, Filebeat, Auditbeat, Google Cloud, AWS
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
Sebastian T.
Last position:
Software Engineer / Cloud Engineer at OC Fulfillment GmbH
- Hybrid role as the first software engineer in the company to bootstrap the organization, laying out technical foundation and advising management on organizational aspects.
- Set up the SaaS platform architecture, selected languages and tools, and designed processes to deliver customer value quickly and reliably.
- Designed and implemented build and continuous deployment pipeline with multi-tenant approach enabling extreme scaling of the SaaS platform.
- Established initial ITSM and support processes, provided monitoring and alarming, and participated in the on-call team.
- Proposed new approaches to scale the platform and improve backend interfaces to mitigate bugs and communication overhead.
- Mentored new employees and served as a trustful team member and lateral leader.
- Conducted interviews for technical roles.
- Used technologies: Typescript, Node.js, Bash, Google Cloud Platform (App Engine, Cloud Run, Cloud Functions, Google Endpoints, Firebase), GitHub Actions, Docker, Terraform, MongoDB, Firebase, REST APIs, GraphQL.
Gazi B.
Last position:
Senior IT Architect, SAP, SAP BTP Architect, CPI Senior Consultant and Architect at Uniper Corporate IT
Developing and implementing IT architectures for business-critical applications, BCM/ITSCM, SAP, BTP and S/4HANA, Azure, interfaces and IT infrastructure according to Uniper security guidelines and compliance policies
IT cloud infrastructure management: Requirements management and SLA definition for critical SAP and non-SAP applications and infrastructures based on the Key Production Environment algorithm; creating a conceptual target architecture; creating agile project plans for migration; risk management and vulnerability analysis; developing training content and e-learnings; establishing and optimizing risk management processes; creating action catalogs, architectures and ITSCM/emergency plans; identifying and managing internal and external partners
Developing BCM/ITSCM concepts and IT infrastructure architectures for business-critical applications according to Azure Cloud, SAP BTP and Uniper governance frameworks; documenting and implementing ITSCM/emergency plans in line with disaster recovery patterns; creating training materials and coordinating training sessions; testing, simulating and optimizing BCM/ITSCM plans and IT architectures; ongoing training of management and staff on IT architectures, operating models, SAP BTP as well as BCM and emergency plans
Technical lead of the SAP services team: Managing and coordinating external vendors, service owners and application managers; developing and implementing ITSM processes (incident, problem, change, SLM, IT security, provider management, ITSCM, asset and configuration management); training internal and external service providers and service managers; optimizing IT service contracts and OLAs; updating the service catalog; communicating and escalating issues; defining responsibilities and monitoring SLA criteria; conducting root cause analysis; partly acting as release manager for SAP ERP releases
Migration: Requirements management, budget and financial planning; risk management; defining and implementing transformation and migration plans; weekly reporting to Uniper vice presidents and senior management; maintaining project plans and backlogs in Jira and Azure DevOps; managing up to 50 internal and external stakeholders; workshops and meetings; quality assurance: defining quality gateways and monitoring
Test management: Creating and documenting test plans; evaluating test risks; identifying stakeholders for test plans; documenting test scenarios; defining error categories and quality gateways; coordinating and executing tests
Discover over 15,000 top freelancers
Statistics of experts using Debian
Aggregated from the professional profiles of matched freelancers.
Experience
21 years (Germany: 22 years)
Position duration
2.7 years (Germany: 3.1 years)
Positions per freelancer
18 (Germany: 15)
Top business areas
Information Technology, Operations, Project Management
Top industries
Information Technology, Telecommunication, Manufacturing
Certification focus areas
Information Technology, Project Management, Operations
Bachelor's degree or higher
83% (Germany: 75%)
Master's degree or higher
67% (Germany: 41%)
Doctorate
17% (Germany: 12%)
Certifications per freelancer
8 (Germany: 3)
Most common languages
German, English, Russian
Speak two or more languages
100% (Germany: 99%)
Based on our profile pool as of 19 Sep 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 Debian
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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Debian 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%)
- Telecommunication (90%)
- Manufacturing (60%)
- Automotive (40%)
- Energy (40%)
- Professional Services (40%)
- Government and Administration (40%)
- Retail (40%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Debian at a glance
Debian is a free, open-source GNU/Linux distribution known for its stable package base, careful release process and broad hardware support. Companies use it for web servers, databases, network services, development environments and embedded systems. Its APT package management and extensive repositories make repeatable system maintenance practical.
Where it runs
Debian supports workloads from small virtual machines to large production estates. It commonly hosts reverse proxies, application services, mail systems, containers, monitoring tools and internal platforms. In Cologne, companies across media, logistics, manufacturing and digital services may rely on Debian for dependable infrastructure behind customer-facing and business-critical systems.
Ecosystem and tooling
Debian expertise includes more than installing the operating system. Specialists work with systemd, APT, SSH, Bash, Python, Nginx, Apache, PostgreSQL, Docker and virtualization technologies. They also connect Debian environments with Ansible, Terraform, Git-based delivery pipelines, backup systems, observability stacks and cloud services.
When companies need help
- Migrate services from another Linux distribution or an aging server estate
- Harden Debian hosts, permissions, SSH access and network exposure
- Automate provisioning, patching, backups and configuration management
- Stabilize web, database, container or virtualization workloads
- Prepare reliable development, staging and production environments
Freelance expertise is useful during migrations, audits, incident recovery and periods of rapid infrastructure change. A specialist can also document operational knowledge before an internal handover.
What strong specialists deliver
Strong Debian professionals begin with the workload, threat model and recovery requirements rather than applying a generic server template. They use version-controlled configuration, least-privilege access, tested backups and clear rollback plans. They can explain trade-offs between Debian Stable, newer repositories and containerized services without compromising maintainability.
Working together effectively
Debian work often suits remote collaboration because access, documentation and automation can be handled securely online. On-site sessions in Cologne can still help with hardware, private networks or data-centre transitions. Before engagement, define the service inventory, access boundaries, maintenance window, expected handover and success criteria so the specialist can work safely and independently.
Frequently asked questions
Everything clients usually want to know about Debian, in one place.
Debian is used to run web servers, databases, mail services, network components, containers, virtual machines and development environments. Its stable packages and strong community ecosystem suit systems that need predictable maintenance and long operating periods.
Debian is often chosen for its conservative release approach, broad architecture support and close alignment with upstream open-source projects. Ubuntu can offer a more guided commercial ecosystem and faster access to selected packages, while the right choice depends on support needs, workload constraints and operational preferences.
Debian work often connects with Bash or Python scripting, networking, systemd, SSH, Nginx, databases, containers and virtualization. Infrastructure as code, Ansible, monitoring, backup design and security hardening are also valuable when the specialist owns a production environment.
The required depth depends on the risk and scope of the work. Debian specialists handling a basic server setup need different experience from someone migrating critical services, designing high availability or recovering a compromised host. Ask for examples that match your workload and operational constraints.
Debian administration is commonly performed remotely through controlled SSH access, bastion hosts, automation and shared documentation. On-site collaboration in Cologne may be useful for physical servers, restricted networks or infrastructure transitions, while clear access rules and German or English communication should be agreed in advance.
A strong Debian professional should provide working configuration, automation where appropriate, security decisions, backup and recovery procedures, monitoring guidance and concise documentation. A handover should explain routine operations, known risks, escalation paths and how to roll back changes.
Ask how the specialist approaches patching, least-privilege access, logging, backups and failed deployments. A capable Debian professional will ask about recovery objectives, traffic, dependencies and change control before proposing commands or architecture.
Debian is a solid base for container hosts, cloud instances and automated infrastructure when the image, kernel, packages and update process are managed carefully. The specialist should also understand the surrounding container runtime, orchestration, networking, secrets and observability rather than treating the host in isolation.
The average hourly rate of freelancers in Cologne, Germany who have used Debian in their recent projects is 114 €, which corresponds to a daily rate of about 908 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Debian in their recent projects, 83% hold at least a Bachelor's degree, 67% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers in Cologne, Germany who have used Debian in their recent projects have 21 years of professional experience, with a single engagement typically lasting around 2.7 years.
The most common languages among freelancers in Cologne, Germany who have used Debian in their recent projects are German (100%), English (100%), and Russian (20%).
The most common industries among freelancers in Cologne, Germany who have used Debian in their recent projects are Information Technology (100%), Telecommunication (90%), and Manufacturing (60%).
The most common business areas among freelancers in Cologne, Germany who have used Debian in their recent projects are Information Technology (100%), Operations (80%), and Project Management (80%).
Main locations of FRATCH Experts, who have recently used Debian
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 
Dortmund Request a free demo
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