Linux Experts in Dortmund
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Meet FRATCH Experts in Dortmund, who have recently used Linux
Nemanja Milenković
Last position:
AI Engineer / Senior Backend Engineer at Intelycx
Manufacturing intelligence platform with enterprise workflows, RAG, real-time AI assistant features, and multi-repository backend architecture.
- Built and extended production AI/backend services with Django, DRF, FastAPI, GraphQL, Celery, PostgreSQL, MySQL, Redis, and WebSockets across a modular multi-repository platform.
- Contributed to ARIS V2, a real-time manufacturing AI assistant using LangChain, LangGraph, MCP tool orchestration, planning/execution flows, OpenAI, AWS Bedrock, Qdrant, and Elasticsearch/OpenSearch-backed retrieval.
- Supported rollout expansion from ARIS V1 in 4 of 17 client production plants to ARIS V2 currently active in 13 of 17 plants, increasing real-world deployment coverage to more than 50% of the client footprint.
- Worked on document-grounded RAG functionality including ingestion, OCR, chunking, embeddings, indexing, retrieval, reranking, and grounded answer generation for industrial workflows.
Stack: Python, Django, DRF, FastAPI, LangChain, LangGraph, GraphQL, Celery, WebSockets, OpenAI, AWS Bedrock, Qdrant, Elasticsearch/OpenSearch, PostgreSQL, MySQL, Redis, Docker.
Laurin Hagemann
Last position:
Software Architect (Freelance) at Care4Sure
- Delivered MVP-focused full-stack architecture for a health-sector client: Vite/React frontend, backend services on Google Cloud Run, and Supabase for database plus IAM/authentication.
- Supported product requirements engineering and prioritized cost-aware workload placement, implementing browser-side/edge computation where feasible before moving logic to backend services.
Ashwin Parthasarathy
Last position:
Freelance Data Scientist at Mercor Intelligence
- Architected and deployed end-to-end machine learning pipelines across classification and prediction datasets, ensuring robustness and reproducibility through MLOps best practices.
- Contributed directly to LLM model output accuracy improvement by designing and engineering specialised prompts grounded in end-to-end ML and SciML pipeline logic.
- Developed training data for large language models by formulating coding problems that models could not resolve and subsequently documenting the correct solutions.
Diego Espinoza
Last position:
RPG Software Developer from RPG III to Free Format
- Development of software and system support for RPG development.
- Development, optimization and maintenance of programs in RPG (RPG II to ILE Free Format).
- Performing integration tasks, data management as well as applying and managing system updates.
- User support and training to ensure smooth system operation.
Jens Schneeweiß
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
Tarek El Idrisi
Last position:
Associate GRC at Egerer Consulting
Carve-out project: Development of certification strategy, implementation and requirement plans across multiple standards — ISO/IEC 27001, ISO 9001, ISO 14001, ISO 22301, ISO/IEC 20000-1, BSI IT-Grundschutz, and BSI TR-RESISCAN
- Cross-standard inventory and risk assessment
- Coordination with cross-department stakeholders: ISB, executive management, certification bodies, legal and data protection
- Consulting in information security, GRC, and IT auditing
Arkadius Sikora
Last position:
Architect; Senior Developer; Full Stack Developer; DevOps Lead at Bitmarck Holding GmbH
- Requirement engineering for Ombudsstelle and creation of technical user stories for EPA V3
- Handling of objections and revocations via mail and letter with high transaction mail volume
- Coordination with other teams on interfaces
- Design of a highly available, high-throughput solution on OpenShift with Java backend microservices
- Implementation and extension of microservices
- Infrastructure setup for deployment on OpenShift/Kubernetes including Jenkins pipelines
- Integration with BitIAM, TI-M Fachdienst, Consent Keeper and FDV
- Capture of requirements from DevOps operations and business units
- Continuous integration and Scrum practices
- Use cases: Kassenfusion, Opt-Out, Last Test, Widerspruchsmanagement
- Integration test automation and feature extensions including Spring Boot 3 updates
Aladdin Alzoubi
Last position:
Technical Consultant at NFON
- Presentations and workshops regarding different VOIP products and technologies
- Design of VOIP and network solutions from core to premium solutions and necessary non-standard solutions
- Processing of tenders
- Development of VOIP and network technical implementation of customer requirements
- Implement and configure different UC products on cloud
Mesut Yilmaz
Last position:
Solution Architect Computer Vision Store at Schwarz IT (Lidl/Kaufland)
- Expansion and support of the product portfolio for video analytics and computer vision
- Requirements gathering and engineering
- Consulting, project management and coordination of the pilot and international rollout
- Tools: IP-based camera and video systems, Citrix administration, OneNote, Microsoft Teams, Node-RED, Office 365, Age Verification, Qognify Umbrella, ThingsBoard, Xovis 3D sensors, AXIS cameras, GK checkout software, Atlassian JIRA
Mohamad Alosman
Last position:
Systems Engineer for Network Security at Bechtle AG
- SD-WAN solution by Aruba – Swiss energy company (330 sites): design and implementation of an SD-WAN branch solution with Aruba 9004 gateways, encrypted overlay, policy-based routing, WAN load balancing, and centralized management via Aruba Central.
- LAN/WLAN & security – schools in Germany (9 sites): deployment of Aruba switches & AP-505, FortiGate 80F firewalls; setup of Checkmk monitoring, incident and change management, and secure admin access (BeyondTrust).
- Multi-site security – energy billing company (20 sites): deployment of a complete Fortinet solution (FortiGate HA cluster, FortiSwitch PoE, FortiAP), IPsec remote-access VPN via FortiClient, centralized management via FortiCloud, IntraID authentication, operations and incident management.
- Data center migration – German client: migration of data center switches (Mellanox), firewall cluster, and OfficeConnect switches to a new data center; securing configurations, implementing HA designs, testing, monitoring, and coordinated change and incident processes. Setup of two new 6300 M VSX clustered switches.
- Data center security – university hospital: implementation of a high-availability FortiGate 400F firewall cluster across three data centers; security policy design, operational support, and change/incident management.
- Enterprise campus & network access control – manufacturing company in Germany: introduction of Aruba ClearPass NAC, setup of a VSX-based switching architecture, secure WLAN access with MPSK, and integration into existing networks.
- EU client (Germany & Poland) – Sophos firewalls: operations, incident and change management of Sophos firewalls including IPsec VPN; troubleshooting and ongoing optimization of security configurations.
- Network modernization – pharmacy client in Germany: design and rollout of core and access switching (Mellanox, Aruba Instant On), migration from Sophos to Fortinet firewalls, network segmentation, and security hardening.
Jean Erge Ekeu Tcheumeni
Last position:
Engineer - Automation Technology at Ravensburg Milchwerke GmbH
- Plan and design complex production systems as part of a team
- Develop and modify electrical circuit diagrams
- Design electrical machine controls and drive technology
- Troubleshoot electronic assemblies
- Develop PLC and visualization software as well as process control software
- Identify and implement optimization measures
- Create operating instructions
- Ensure IT security of all operational technology
- Support building services
- Technologies: Eplan P8, PCS7, ProLeiT, PlantiT, TIA, S7
Yoav Netzer
Last position:
Freelance Software Architect at Freelance Consultant
- Various small consultations, e.g. concepts and arcitectures.
- Updating my Matlab, Linux, IPv6, Cyber-Security, C++ (up to 23) and Python skills.
Hendrik Belitz
Last position:
Lecturer at Front and Fullstack Development Lecturer
- Teaching JavaScript, HTML, CSS, React, NodeJS, MongoDB, MariaDB, and Express
- Designing and preparing lessons
- Classroom teaching and one-on-one coaching
Rosemarie Fryzowicz
Last position:
Freelance Management Consultant in the Construction Industry at Freelance Management Consultant
- Implemented Agile methodologies to drive AI-enabled process optimization
- Integration of AI-driven solutions with SAP S/4 HANA
- Facilitated the adoption of advanced analytics tools to enhance decision-making
Yasin Yildiz
Last position:
DevOps Architect & Backend Developer at Schweizerische National Bank
- Architecting and enhancing the DevOps infrastructure in a regulated environment
- Migration, planning, and development from a monolith to microservices (ASP.NET Core)
- Building and maintaining CI/CD pipelines (GitLab, Jenkins) to support agile development
- Managing artifact repositories with JFrog Artifactory and security scans via Xray
- Migrating and integrating source code repositories (SVN → GitLab)
- Operating and configuring a container platform with OpenShift
- Automating deployments with Ansible, Helm, and the Ansible Automation Platform
- Implementing monitoring and alerting solutions with Prometheus
- Collaborating closely with the frontend development team to optimize build, test, and release processes
- Supporting the establishment of secure and scalable infrastructure processes (Secure SDLC)
- Documenting and sharing knowledge within the team
- Leading refinements and designing the backend architecture
Discover over 15,000 top freelancers
Statistics of experts using Linux
Aggregated from the professional profiles of matched freelancers.
Experience
20 years (Germany: 21 years)
Position duration
1.9 years (Germany: 5.2 years)
Positions per freelancer
14
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Manufacturing, Healthcare
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
88% (Germany: 86%)
Master's degree or higher
38% (Germany: 55%)
Certifications per freelancer
4 (Germany: 3)
Most common languages
German, English, Spanish
Speak two or more languages
100% (Germany: 98%)
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 Dortmund 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 Dortmund using Linux
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
Linux roles
Linux powers servers, cloud workloads, containers, and embedded systems. Companies bring in specialists for system setup, access control, patching, troubleshooting, and performance tuning across Ubuntu, Debian, RHEL, and SUSE. It is a practical choice when stability and control matter.
Common tasks
- Install and configure Linux servers
- Set up users, permissions, and services
- Automate routine admin work with shell scripts
- Troubleshoot boot, storage, and network issues
- Review logs and improve system security
Ecosystem
Strong professionals work comfortably with Bash, systemd, SSH, cron, package managers, and common monitoring tools. They also understand file systems, networking, virtualization, and container runtimes such as Docker and Kubernetes. The best specialists keep systems tidy, documented, and easy to support.
When to hire
Bring in freelance help when a server setup must move fast, an old system needs cleanup, or internal teams need extra hands for operations work. In Dortmund, this often fits companies with industrial, logistics, software, and infrastructure needs that depend on reliable Linux systems. Remote support works well for most tasks; on-site help is useful for hardware, network, or recovery work.
What good experts do
- Diagnose root causes instead of treating symptoms
- Explain changes clearly before they are applied
- Write maintainable scripts and documentation
- Keep security and uptime in view together
Project fit
Linux specialists often support server migrations, environment hardening, monitoring setup, backup design, and incident response. They may also help with Alpine Linux, Red Hat Enterprise Linux, or legacy distributions where careful handling matters. Strong work shows up in stable systems, clear handover notes, and fewer repeat issues.
Frequently asked questions
What clients ask us most about Linux — answered in short.
Linux is used for servers, cloud instances, network services, containers, and many embedded or appliance systems. Companies also rely on it for file services, application hosting, automation, and secure remote access. It is often chosen when teams want control, flexibility, and predictable operations.
Linux is often preferred for command-line administration, automation, container workloads, and many web or infrastructure services. Windows Server is more common when a project depends on Microsoft-specific tools or Active Directory-heavy setups. A good specialist can tell you which stack fits your environment, not just defend one side.
A strong Linux professional usually knows shell scripting, networking, storage, and service management. Useful adjacent skills include SSH, systemd, package management, monitoring, backup design, and often Docker or Kubernetes. For some projects, cloud basics and security hardening matter just as much.
A simple server setup may only need a specialist who has handled the same distribution and service stack before. More complex work, such as migrations, security hardening, or recovery after an outage, needs someone who has seen messy systems and can work carefully. The right level depends on risk, not just task size.
Most Linux work can be done remotely through SSH, VPN, and shared tooling. On-site support in Dortmund is more useful when hardware access, local network troubleshooting, or physical recovery is involved. Many companies use a mix: remote for daily work and on-site only when needed.
In practice, Linux specialists may cover system administration, automation, security, and troubleshooting together. Companies usually care less about the label and more about whether the person can run the environment safely and explain trade-offs clearly. The best profiles have broad hands-on experience, not just one narrow focus.
Look for clear examples of systems they have supported, the distributions they know, and the problems they have solved. A strong Linux expert can describe how they handle updates, access, logging, backups, and incident recovery without vague language. Good signs are structured thinking, clean documentation, and practical security habits.
Yes, Linux remains a core choice for modern infrastructure because it fits cloud, containers, automation, and many server workloads. It also works well for long-lived systems where stability matters. The key is choosing the right distribution and keeping the setup well maintained.
The average hourly rate of freelancers in Dortmund, Germany who have used Linux in their recent projects is 85 €, which corresponds to a daily rate of about 677 € based on an 8-hour working day.
Of the freelancers in Dortmund, Germany who have used Linux in their recent projects, 88% hold at least a Bachelor's degree and 38% hold at least a Master's degree.
On average, freelancers in Dortmund, Germany who have used Linux in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Dortmund, Germany who have used Linux in their recent projects are German (100%), English (95%), and Spanish (24%).
The most common industries among freelancers in Dortmund, Germany who have used Linux in their recent projects are Information Technology (81%), Manufacturing (57%), and Healthcare (52%).
The most common business areas among freelancers in Dortmund, Germany who have used Linux in their recent projects are Information Technology (95%), Product Development (81%), and Quality Assurance (67%).
Main locations of FRATCH Experts, who have recently used Linux
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 
Essen 
Bremen 
Dresden 
Hanover 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
