Service-Oriented Architecture Experts in Cologne
in minutes from 15,000 CVs with the power of AIHire experts who design, review, and modernize service layers, API contracts, and integration flows with Service-Oriented Architecture. Get specialists who can work on enterprise systems, SOAP and REST interfaces, and clear service boundaries, with fast, precise matching to vetted, available freelancers.
Meet FRATCH Experts in Cologne, who have recently used Service-Oriented Architecture
Burhan Dinler
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
Christoph Sawicki
Last position:
Test Manager at Logistics
- Coordination and planning, execution, documentation, and analysis of test cases
- Development of test concepts considering best practices (e.g., test pyramid) with a focus on reliable, automatable test runs
- Implementation and maintenance of test cases according to the test concepts
- Technologies: Citrix Workspace, Shopify, Jira, Xray, MS Teams, MS SharePoint, Confluence, MS Office 365
Michael Kunz
Last position:
Enterprise Architect, Lead Architect of the transformation program and coach at Swiss Ministry
- Development of the overall architecture
- Support for the respective workstreams in developing architectures in the areas of infrastructure, data centers, security, and network topology
- Coordination of the architect pool
- Support for program management in building the transformation project based on agile methods
- Consideration of regulatory requirements for IT projects in the federal administration
Hüseyin Altuntas
Last position:
Business Analyst at Niedersächsisches Ministerium für Inneres, Sport und Digitalisierung
- Responsibility, also as rollout manager, for the successful transition of a basic OZG platform into the client's standard operations by planning and implementing measures along Service Transition and Service Operation according to ITIL, including workshops in a SAFe environment with more than 40 operational stakeholders
- Building and maintaining cross-organizational stakeholder relationships by organizing and running various information sessions on technical configurations and user guides (platform and EfA services)
- Designing and improving various operational and project documents such as the ITIL operations manual, OLA, SLA, service support concept and rollout instructions
- Modeling project-based processes according to BPMN 2.0, EPK and UML related to OZG services with the goal of integrating them into the operational e-government process landscape (SOA)
- Coordinating operational stakeholders and KPI reporting to the project management team using agile methods according to SAFe
- Tech stack / tools: Microsoft 365 (SharePoint, OneNote, Outlook, Teams), Skype for Business, Cisco Webex, ADONIS, MindManager, Jira, Confluence
Alexander Vasiliev
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
Vladimir Maznicenko
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
Sebastian Thees
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.
Discover over 15,000 top freelancers
Statistics of experts using Service-Oriented Architecture
Aggregated from the professional profiles of matched freelancers.
Experience
26 years (Germany: 22 years)
Position duration
1.8 years (Germany: 2.5 years)
Positions per freelancer
27 (Germany: 14)
Top business areas
Information Technology, Operations, Product Development
Top industries
Information Technology, Transportation, Telecommunication
Certification focus areas
Information Technology, Project Management, Marketing
Bachelor's degree or higher
100% (Germany: 96%)
Master's degree or higher
60% (Germany: 56%)
Doctorate
20% (Germany: 4%)
Certifications per freelancer
4 (Germany: 3)
Most common languages
German, English, Russian
Speak two or more languages
100% (Germany: 92%)
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 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 Service-Oriented Architecture
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
Service boundaries
Service-Oriented Architecture, or SOA, structures systems as separate services that expose clear interfaces and exchange data through defined contracts. It is used to connect business domains, reduce tight coupling, and keep large applications easier to evolve.
Typical work
- Define service contracts and message formats
- Review orchestration and choreography
- Split legacy monoliths into reusable services
- Align integration patterns across teams
- Document dependencies and ownership
Ecosystem
SOA often sits around SOAP, REST, XML, JSON, Enterprise Service Bus tools, and API gateways. Strong professionals also know message queues, schema design, identity handling, and how to keep services observable and versioned without breaking consumers.
When to bring help
Companies usually bring in freelance expertise when integration projects stall, interfaces become hard to maintain, or teams need support during platform migration. In Cologne, this often matters for larger industrial, logistics, retail, and media environments where many internal systems must work together reliably.
What good specialists do
Good specialists think in contracts, not just in code. They spot hidden coupling, design stable service ownership, and balance reuse with practical boundaries so the architecture stays supportable over time.
Delivery focus
- Service decomposition and interface review
- Legacy modernization and migration planning
- Integration troubleshooting and incident support
- Governance for naming, versioning, and reuse
- Remote collaboration with local workshop options in Cologne
Frequently asked questions
Before you brief your next project: the most common questions about Service-Oriented Architecture.
Service-Oriented Architecture is used to build systems from separate services that communicate through well-defined contracts. It helps companies connect business functions, reuse shared capabilities, and change one part of the landscape without rewriting everything else.
SOA and microservices both split systems into services, but they usually differ in scope and governance. SOA often centers on shared enterprise integration, orchestration, and broader service reuse, while microservices usually push smaller ownership boundaries and lighter communication patterns.
A Service-Oriented Architecture specialist is useful when teams must untangle legacy integrations, redesign service contracts, or recover from brittle dependencies. The right expert is also valuable during migration work, when several systems need to keep running while the architecture changes.
A strong SOA expert usually understands SOAP, REST, XML, JSON, messaging, and interface versioning. Knowledge of governance, identity, monitoring, and distributed error handling matters too, because service design is only part of the job.
Yes. Service-Oriented Architecture is often chosen precisely because it can wrap older systems with service interfaces instead of replacing everything at once. That makes it useful for gradual modernization and for exposing stable capabilities to new applications.
Look for a Service-Oriented Architecture professional who can explain service boundaries clearly and show how they prevent coupling problems. Strong evidence includes contract design, migration plans, operational thinking, and examples of systems that stayed maintainable after delivery.
Some SOA work can be done fully remote, especially interface design, documentation, and review work. On-site workshops in Cologne can help when stakeholders need to agree on boundaries, ownership, and integration rules across several teams.
Yes, Service-Oriented Architecture remains relevant wherever many enterprise systems must coordinate reliably. Even when teams use modern APIs or cloud-native services, SOA principles still help with contract discipline, integration governance, and long-term maintainability.
The average hourly rate of freelancers in Cologne, Germany who have used Service-Oriented Architecture in their recent projects is 89 €, which corresponds to a daily rate of about 712 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Service-Oriented Architecture in their recent projects, 100% hold at least a Bachelor's degree, 60% hold at least a Master's degree, and 20% hold a doctorate.
On average, freelancers in Cologne, Germany who have used Service-Oriented Architecture in their recent projects have 26 years of professional experience, with a single engagement typically lasting around 1.8 years.
The most common languages among freelancers in Cologne, Germany who have used Service-Oriented Architecture in their recent projects are German (100%), English (100%), and Russian (29%).
The most common industries among freelancers in Cologne, Germany who have used Service-Oriented Architecture in their recent projects are Information Technology (100%), Transportation (86%), and Telecommunication (86%).
The most common business areas among freelancers in Cologne, Germany who have used Service-Oriented Architecture in their recent projects are Information Technology (100%), Operations (86%), and Product Development (86%).
Main locations of FRATCH Experts, who have recently used Service-Oriented Architecture
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.
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Philipp Thomaschewski
FRATCH CEO
