Solaris Experts in Cologne
with precise AI matching and vetted, available freelancersHire experts who maintain mission-critical Solaris environments, modernize SPARC workloads, and manage Oracle Solaris Zones, ZFS, and networking. Get matched quickly with vetted, available freelancers who fit your technical and project needs.
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: 3.4 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: 74%)
Master's degree or higher
43% (Germany: 44%)
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 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 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 29 Oct 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
Solaris at a glance
Solaris is Oracle’s enterprise operating system for SPARC and x86 systems. It is used where predictable performance, long operating lifecycles, strong isolation, and dependable service management matter. Its tooling includes SMF, DTrace, ZFS, RBAC, and Solaris Zones.
Systems and workloads
Solaris supports database hosting, transaction processing, telecommunications, public-sector systems, and other back-end workloads that require controlled operations. Companies also use it for legacy applications that cannot be moved without careful testing, data migration, or changes to hardware and software dependencies.
- Run and maintain SPARC or x86 Solaris hosts
- Support Oracle Database and other enterprise workloads
- Isolate services with Solaris Zones
- Protect and recover data with ZFS
Ecosystem and skills
Strong specialists understand both the operating system and the environment around it. Relevant skills include Oracle Solaris Cluster, Logical Domains, virtualization, shell scripting, TCP/IP, storage, backup, monitoring, and enterprise identity services. Knowledge of Oracle hardware and legacy application dependencies is often essential.
When companies hire specialists
Freelance expertise helps during migrations, audits, outages, upgrades, and platform consolidation. Companies also bring in specialists when internal teams need a safe plan for moving from SPARC to x86, reducing operational risk, or connecting Solaris with Linux and cloud-based services.
- Assess an existing Solaris estate and its dependencies
- Plan patching, upgrades, and controlled cutovers
- Tune performance across compute, storage, and networks
- Document runbooks, recovery procedures, and handover steps
Collaboration in Cologne
A Solaris assignment may involve data centers, distributed operations teams, or vendors outside Cologne. Remote work is practical for analysis, documentation, monitoring, and planning, while on-site access can matter for hardware changes and controlled maintenance windows. Clear English is common; German may be useful for local stakeholders and operational documentation.
What strong professionals deliver
Experienced Solaris professionals begin with evidence: system data, service dependencies, capacity, logs, and recovery requirements. They make changes reversible, test failover paths, and explain operational impact before touching production. Look for hands-on work with the relevant Solaris release, SPARC or x86 hardware, storage layout, clustering needs, and the company’s business-critical applications.
Frequently asked questions
Before you brief your next project: the most common questions about Solaris.
Solaris is used for reliable enterprise workloads such as database systems, telecommunications, transaction processing, and long-running business applications. It is also maintained when an organization depends on SPARC hardware or applications with deep Solaris-specific integrations.
Solaris offers distinctive tools such as ZFS, DTrace, SMF, and Solaris Zones, plus close integration with Oracle systems. Linux generally offers a broader hardware and software ecosystem, so the right choice depends on application compatibility, operational skills, support requirements, and migration risk.
Solaris work often requires knowledge of SPARC, Oracle hardware, ZFS, networking, shell scripting, storage, monitoring, and backup. Experience with Oracle Database, Solaris Cluster, Logical Domains, identity services, and Linux integration is valuable for mixed environments.
Solaris projects need different levels of experience depending on risk and scope. Routine administration may suit a professional familiar with the existing runbooks, while migrations, cluster changes, performance incidents, and SPARC-to-x86 transitions require proven production experience with comparable systems.
Solaris administration can often be performed remotely through secure access, especially for assessment, monitoring, patch planning, documentation, and troubleshooting. On-site work may still be needed for physical SPARC or x86 hardware, data-center procedures, and maintenance windows that require local coordination.
Oracle Solaris is the current official name, while Solaris remains the common short form. A useful brief should also state the release, SPARC or x86 architecture, hardware model, Zones or Cluster usage, storage setup, and the applications that depend on the environment.
Solaris changes should start with service dependencies, boot and recovery behavior, storage health, cluster configuration, monitoring, and tested backups. A careful professional confirms the rollback path and validates changes in a comparable environment before applying them to production.
Solaris expertise is best assessed through specific evidence: comparable production environments, clear incident or migration examples, and an explanation of how risks were controlled. Ask how the professional would inspect SMF services, ZFS pools, Zones, performance data, and recovery procedures before recommending action.
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 
Essen 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
