Solaris Experts in Cologne
matched in minutes with the power of AIWork with specialists who maintain SPARC hardware, configure ZFS pools, automate Zones virtualization, and modernize legacy Unix environments, swiftly matched with vetted professionals.
Meet FRATCH Experts in Cologne, who have recently used Solaris
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
Burhan D.
Last position:
Enterprise Architect & Solution Architect at DB Netz AG
With project PRIZMA, DB will modernize its infrastructure on the one hand, and develop a fail-safe IT landscape on the other hand, which can be restored quickly and securely in case of a disaster.
- Capture current architectures of existing systems as well as methodical consulting and development of target architectures
- Deepen and maintain the building plan / target IT landscape
- Implement technical architecture concepts & architecture descriptions
- Implement migration concepts for updating and further developing the platform and information systems
- Assess submitted improvement suggestions as part of the project
- Capability management: identify capability gaps, develop target visions, and support transformation planning within the enterprise architecture.
- Create a compatibility matrix of the components in use and compare dependencies of specific versions
- Create an IT concept for extending the platform with the following topics: hardware and software requirements, security, licensing, high availability, load balancing, backup & recovery, update strategy, monitoring integration, etc.
- Coordinate with business architects as well as technical architects from the cross-functional architecture area of the PRISMA program for the topics (backup, Active Directory, monitoring, Citrix, and business applications ...)
- Status meetings and alignment of project planning with the Release Train Engineer / Project Manager
- Advise the Release Train Engineer / Project Manager in identifying project risks
- Advise the System Architect Engineers in steering the implementation of the concept
- Implement the IT concept
- Document the infrastructure
Label: MS Project, LINUX, Windows, ORACLE, Java, REST, SharePoint, Microsoft Exchange, UML, Enterprise Architect, BPMN, AZURE, AWS, V-MODEL, Micro Service, VisualStudio, SAP S/4HANA, SCRUM(SAFE), ESB (TIBCO), Python, Innovator, LeanIX (TOGAF), Ansible, Ansible Tower, Ansible Automation, ROBOT, SpringBoot
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
Eberhart N.
Last position:
Service and Change Manager; Project Manager at Uniper-Energy
- Project manager for transition and migration of IPC Trader Telephony to 3CX-based dispatcher and Cloud9-based trader telephony
- Planned and managed company-wide replacement of IPC Trader Telephony with 3CX and Cloud9 solutions
- Continuous improvement of implementation processes and development and execution of optimization measures
- Planned, coordinated and tracked delivery of IT equipment and service provision at all sites
- Led a team of IT site managers to ensure IT services were delivered on time, within budget and with required quality
- Defined project scope in coordination with all business resources
- Planned and executed software and hardware rollouts, including user support during implementation
- Communicated with key customers and service organizations and collaborated with traders, telephony architects, app owners, testers and technical IPC teams
- Conducted stakeholder analysis for creation and maintenance of change management processes
- Managed full change process: prepared change requests, defended them in change board, communicated at company and user level, and supported change implementation
René K.
Last position:
Freelancer at Freelance work
- Business analysis
- Requirements management
- Project management
- Stakeholder management
- Team leadership
Vladimir M.
Last position:
Developer at Financial services provider
- Support and further development of a framework for developing applications in a banking association: DynS/OSPE
- Migration of the framework to Java 11 and Java 17
- Java8, Java11 and Java17, Spring, Spring-Batch, Spring WebServices, Spring-Security, Spring-Data, JPA, Hibernate, OpenSource libraries etc.
- XML, JAXB, JSON, REST and SOAP services, DB2, Oracle, WebSphere or Liberty AS, FreeMaker, Junit, mock libraries, JaCoCo, Maven, IntelliJ, Eclipse, GitHub, SVN, Jira
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.
Robert M.
Last position:
Air traffic tax German Customs Administration SOAP Webservices Client Requests at Team GmbH
In the citizens' and business customer portal of the Customs Administration, airlines submit applications for departures and landings every month
These applications are forwarded to the caseworkers via SOAP web service and, after review and processing, any queries or notifications are returned via SOAP web service
PL/SQL programming of SOAP webservices client requests for HTTP/XML message exchange between the BuG portal and the caseworkers
New creation and change requests for Forms and Reports 12 modules
Forms applications start and read SOAP webservice requests via PL/SQL packages, process them and send Reports 12 documents to the airlines
Last position:
Rewe Digital
- Creation of Spring Boot integration tests
- Creation of JUnit tests for the coupon system
- Creation of component tests for Kafka topics
- Creation of CI/CD pipeline scripts
- Creation of UI tests with Playwright
- Creation of UI tests with Cypress
- Review of developer unit tests
- Planning the test architecture for integration tests
- Creation of the test automation concept
- Evaluation and creation of test reports
Discover over 15,000 top freelancers
Statistics of experts using Solaris
Aggregated from the professional profiles of matched freelancers.
Experience
24 years (Germany: 30 years)
Position duration
2.2 years (Germany: 3.5 years)
Positions per freelancer
20 (Germany: 21)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Telecommunication, Banking and Finance
Certification focus areas
Information Technology, Project Management, Operations
Bachelor's degree or higher
86% (Germany: 73%)
Master's degree or higher
43% (Germany: 42%)
Doctorate
14% (Germany: 5%)
Certifications per freelancer
7 (Germany: 4)
Most common languages
German, English, Russian
Speak two or more languages
90% (Germany: 98%)
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 Solaris
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.
Solaris 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 (80%)
- Banking and Finance (60%)
- Manufacturing (60%)
- Transportation (50%)
- Automotive (40%)
- Energy (40%)
- Insurance (40%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Enterprise Unix Infrastructure on SPARC and x86
Oracle Solaris, formerly known as SunOS, remains a cornerstone operating system for mission-critical enterprise workloads. Organizations rely on its deterministic performance, advanced resource controls, and fault-tolerant architecture to host high-throughput relational databases, core financial systems, and specialized industrial applications.
Advanced Virtualization and Storage with Zones and ZFS
Modern system maintenance centers on native features that provide isolation and data integrity without significant overhead. Solaris specialists design, tune, and maintain complex production setups utilizing native primitives.
- Partitioning compute resources safely via Solaris Zones and branded containers
- Managing petabyte-scale storage, snapshots, and deduplication through ZFS pools
- Enforcing fine-grained service lifecycle policies using the Service Management Facility
- Troubleshooting real-time kernel bottlenecks with dynamic tracing via DTrace
Industrial and Telecommunications Applications in the Rhineland
Enterprises across Cologne and the surrounding Rhine-Ruhr region often run long-lived Unix infrastructure within telecommunications hubs, insurance computing centers, and logistics operations. Maintaining these legacy and modern deployments ensures zero downtime for billing engines, archive stores, and high-availability clusters.
Diagnostic Precision and Performance Observability
Top specialists distinguish themselves through deep kernel observability and low-level system profiling. By utilizing DTrace scripts, mdb, and kstat metrics, professionals isolate I/O contention, memory leaks, and network latency at the system call layer. This eliminates performance degradation before it disrupts dependent business software.
Migration, Cloud Offloading, and Modernization
Organizations frequently require outside expertise to transition workloads smoothly toward modern architectures. Freelance specialists execute delicate migrations:
- Upgrading legacy SunOS instances to modern Solaris 11 releases
- Lifting on-premises SPARC architectures into virtualized emulators or Linux targets
- Hardening network boundaries via IP Filter and automated compliance tools
- Refactoring shell automation to work with modern configuration frameworks
Core Technical Profile of a Solaris Specialist
Seasoned professionals combine comprehensive knowledge of POSIX standards with vendor-specific hardware architectures like Oracle SPARC T-Series or M-Series servers. They manage multi-pathing storage networks, orchestrate disaster recovery across remote sites, and write resilient automation scripts in KornShell, Perl, and Python.
Frequently asked questions
Before you brief your next project: the most common questions about Solaris.
A qualified Solaris specialist must demonstrate deep fluency with ZFS pool maintenance, fault management architecture, and Service Management Facility configurations. Look for proven experience with DTrace for non-invasive production debugging, as well as hands-on exposure to both SPARC firmware management and x86 server hardware.
Enterprises run Oracle Solaris because of its unmatched architectural stability, native data integrity verification through ZFS, and strict binary backward compatibility. Core banking platforms, telecommunications switches, and large ERP databases rely on these features to sustain multi-year uptimes without kernel-level disruptions.
Yes, many SunOS and Unix specialists focus specifically on workload migration, modernization, and cloud rehosting. They map filesystem hierarchies, translate zone configurations into containerized environments, rewrite automated maintenance scripts, and preserve data integrity when transferring storage from ZFS to enterprise Linux targets.
Most operational administration, system patching, and software tuning for Solaris can be delivered completely through secure remote connections. However, projects in Cologne that involve physical SPARC blade replacements, data center cable auditing, or air-gapped financial networks benefit significantly from local professionals who can attend on site on demand.
While Linux provides broader modern hardware support and a vast container ecosystem, Solaris provides tightly integrated primitives like native Zones, kernel-level DTrace, and integrated ZFS that were designed directly into the operating system core. This delivers superior process isolation and granular resource enforcement for large vertical workloads.
Proficient specialists in Solaris typically command deep knowledge of SAN fabrics, Fibre Channel multi-pathing, LDAP directory integrations, and NFS network shares. They are also adept at writing robust automation using ksh, Bash, Python, and enterprise monitoring agents.
International enterprises in the Cologne market regularly use English for their technical documentation, ticketing systems, and infrastructure design reviews. However, local utility operators, insurance carriers, and regional service providers often prefer a Solaris expert who can also communicate comfortably in German for cross-departmental coordination.
Evaluate candidates by presenting real-world scenarios involving storage degradation, locked services, or unkillable processes in Solaris. Strong professionals will outline specific diagnostic paths using mdb, dynamic tracing via DTrace, and fmadm telemetry rather than merely suggesting a system reboot or generic service restart.
The average hourly rate of freelancers in Cologne, Germany who have used Solaris in their recent projects is 101 €, which corresponds to a daily rate of about 810 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Solaris in their recent projects, 86% hold at least a Bachelor's degree, 43% hold at least a Master's degree, and 14% hold a doctorate.
On average, freelancers in Cologne, Germany who have used Solaris in their recent projects have 24 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Cologne, Germany who have used Solaris in their recent projects are German (100%), English (90%), and Russian (20%).
The most common industries among freelancers in Cologne, Germany who have used Solaris in their recent projects are Information Technology (100%), Telecommunication (80%), and Banking and Finance (60%).
The most common business areas among freelancers in Cologne, Germany who have used Solaris in their recent projects are Information Technology (100%), Product Development (80%), and Project Management (70%).
Main locations of FRATCH Experts, who have recently used Solaris
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 
Dusseldorf 
Essen Countries:
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Philipp Thomaschewski
FRATCH CEO
