Object-Oriented Programming Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used Object-Oriented Programming
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
Louis Nguenkam
Last position:
Specialist in Adobe Experience Manager & Microservices at Nguenkam Consulting & Engineering
Java 11/21
Springboot
Swagger/OpenApi
Azure Pipelines
Trivy Integration
Apache Sling
OSGI
Java Content Repository (JCR)
Apache Jackrabbit Oak
Adobe HTL
GraphQL
Maven
GitLab
IntelliJ
Azure Cloud
Azure DevOps
Terraform
AEM specialist in the Scrum team
Development and deployment of microservices via Open API interfaces
Operation of microservices in the Azure Cloud
Implementation of AEM modules and integration with microservices
Member of the knowledge transfer team and a backend coordination team
Dirk Hesse
Last position:
Owner at Soorce GmbH
- On secondment to REWE digital GmbH
- Agile team coach for a brick-and-mortar retail team
- Coaching, lateral leadership and facilitation
- Establishing agile values and applying agile methods
- Team development and conflict moderation
- Facilitating company-wide strategy workshops
- Technologies: Kanban, Scrum, Microsoft Teams, Liberating Structures, Jira, Confluence, Concept Board, Miro, Test-Driven Development, OOP, DBMS (SQL, MySQL, MariaDB, PostgreSQL)
Ingo Cousin
Last position:
Founder, freelance CMS expert at CMS Consulting Cousin
- Freelance work as a CMS expert
Muhammet Tasci
Last position:
Head of IT at Audit Association of German Banks
- Overall responsibility for the strategic and operational realignment and management, further development of IT with direct reporting to the executive board
- Cloud transformation projects: MS365, Exchange Online, SharePoint Cloud, infrastructure cloud migration
- Leading an IT organization with around 20 employees
- Realigning IT as a strategic enabler for the entire organization
- Developing and implementing a holistic IT strategy ("Cloud First") including governance, security, and operational models
- Building a modern service management framework (ITIL) and effective control mechanisms
- Strategically managing software development and delivery (DevOps, CI/CD)
- Implementing cloud and digitization strategies
- Strategic planning and IT roadmap
- Optimizing IT infrastructure
- Budget and cost management
- Infrastructure migration: on-premise to on-premise (colocation)
- Overall responsibility for budget, cost optimization, resource and staff development
- Managing central digitization and transformation initiatives as well as board-level processes
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
René Pelzer
Last position:
CIO at clics GmbH
- Software development
- Team management
- Project management
Discover over 15,000 top freelancers
Statistics of experts using Object-Oriented Programming
Aggregated from the professional profiles of matched freelancers.
Experience
26 years (Germany: 21 years)
Position duration
4.6 years (Germany: 3.1 years)
Positions per freelancer
12 (Germany: 15)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Insurance
Certification focus areas
Information Technology, Product Development, Project Management
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 97%)
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 Object-Oriented Programming
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
Core idea
Object-Oriented Programming, often called OOP, is a way to structure software around objects, classes, and their responsibilities. It is used to build business applications, APIs, internal tools, and systems that need clear boundaries and reusable logic. Strong OOP work keeps code easier to extend and test.
Where it fits
Companies use OOP in many mature stacks, especially Java, C#, Python, PHP, and C++. It shows up in backend services, desktop software, enterprise systems, and long-lived products that need steady change without constant rewrites.
Typical work
- Design class hierarchies and domain models
- Refactor legacy code toward clearer structure
- Improve testability and reduce tight coupling
- Review APIs, interfaces, and inheritance use
- Support migrations between old and modern code patterns
Tooling and practices
Strong specialists work with IDEs, unit test frameworks, static analysis, dependency injection, and version control. They know when to use inheritance, composition, encapsulation, and polymorphism, and when simpler code is better. They also read existing code well, which matters in large systems with years of history.
When to bring in help
Freelance expertise helps when a codebase has grown hard to change, when teams need a design review before a release, or when a new module must fit into an existing architecture. In Cologne, companies often look for support that can work with local teams on site or collaborate smoothly in English and German.
What good looks like
- Clear naming and clean object boundaries
- Practical use of design patterns, not pattern overload
- Code that is easy to test and extend
- Solid understanding of the language and runtime
- Decisions that balance flexibility, readability, and delivery speed
Frequently asked questions
Not sure where to start with Object-Oriented Programming? These answers cover the essentials.
Object-Oriented Programming is used to build software that stays organized as it grows. It is common in business apps, backend services, desktop tools, and systems with many related entities and rules. Teams use it when they need reusable logic, clear responsibilities, and code that can be maintained over time.
OOP organizes software around objects with state and behavior, while functional programming focuses more on functions and immutability. In practice, many systems use both styles where they fit best. A good specialist knows when object models help and when a lighter approach is cleaner.
Object-Oriented Programming is common in Java, C#, Python, PHP, C++, and many enterprise stacks. In those ecosystems, specialists often work with frameworks, testing tools, dependency injection, and ORM layers. The exact stack matters, but the same core skills carry across most OOP-based codebases.
Ask what kind of code the Object-Oriented Programming specialist has worked on, whether they have handled legacy refactoring, and how they approach design trade-offs. You should also ask how they test changes and how they keep existing behavior stable. Good answers are concrete and tied to real project work.
Not every OOP task needs deep architecture work, but hard codebases often do. If the goal is a small feature in a stable module, a capable generalist may be enough. If the task involves redesign, inheritance problems, or long-term maintainability, stronger experience usually pays off.
Yes. Many Object-Oriented Programming projects can be done remotely because the work centers on code, reviews, and collaboration tools. For Cologne teams, on-site time can still help during discovery, workshop sessions, or when working closely with local stakeholders.
A strong Object-Oriented Programming specialist usually also understands testing, design patterns, APIs, databases, and version control. In many projects, knowledge of refactoring, code review, and the surrounding framework is just as important as the object model itself. Communication matters too, especially in larger teams.
Look for code that is easy to read, easy to test, and easy to change. A strong OOP expert explains why a design fits the problem and avoids unnecessary abstraction. The best sign is not fancy terminology, but practical decisions that make the codebase healthier.
The average hourly rate of freelancers in Cologne, Germany who have used Object-Oriented Programming in their recent projects is 88 €, which corresponds to a daily rate of about 704 € based on an 8-hour working day.
On average, freelancers in Cologne, Germany who have used Object-Oriented Programming in their recent projects have 26 years of professional experience, with a single engagement typically lasting around 4.6 years.
The most common languages among freelancers in Cologne, Germany who have used Object-Oriented Programming in their recent projects are German (100%), English (100%), and French (43%).
The most common industries among freelancers in Cologne, Germany who have used Object-Oriented Programming in their recent projects are Information Technology (100%), Banking and Finance (43%), and Insurance (43%).
The most common business areas among freelancers in Cologne, Germany who have used Object-Oriented Programming in their recent projects are Information Technology (100%), Product Development (71%), and Project Management (71%).
Main locations of FRATCH Experts, who have recently used Object-Oriented Programming
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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FRATCH CEO
