Object-Oriented Programming Experts in Dortmund
matched in minutesHire experts who design maintainable class hierarchies, domain models and reusable components across Java, C#, C++, Python and other object-oriented ecosystems. FRATCH matches you quickly and precisely with vetted, available freelancers for your project.
Meet FRATCH Experts in Dortmund, who have recently used Object-Oriented Programming
Yasin Y.
Last position:
Enterprise Architect at Bundesagentur für Arbeit
Task:
- Design and build a proof of concept (PoC) for a future-proof virtualization platform, taking secure system architectures into account
- Assess the current state of existing infrastructures and develop selection and evaluation criteria for the right OS virtualization platform
- Carry out the requirements analysis and then create and prioritize tickets in the ticket system
- Complete and continuously update a tool evaluation matrix based on PoC results
- Support team knowledge building through clear documentation of the approach and results in Confluence
- Enterprise analysis of existing hardware (creating different BoMs)
Technologies: Vmware, Vmware Aria Operations, Osism, Canonical OpenStack, FishOs, Linux, Terraform, Ansible, Confluence, Alma
Patrik G.
Last position:
Technical Lead Conversational AI at CANCOM
- Technical lead of a team developing agentic chatbot solutions (React, TypeScript, Python, FastAPI)
- Architecture design for multi-LLM dialog systems - focus on maintainability, UX, and autonomous execution
- Stakeholder alignment, CI/CD processes, and AI integration at enterprise level
Diego E.
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.
Andreas N.
Last position:
Freelancer at Freelance work
Hamza S.
Last position:
Software Developer at WaslSign
- Designed and implemented the system architecture for scalable document workflows, improving stability and performance.
- Optimized the login flow with TOTP-based MFA, reducing complexity and login time by 35%.
- Built secure backend APIs for document upload, signing, and management.
- Developed encrypted file handling with AWS S3 pre-signed URLs, ensuring GDPR-compliant data protection.
- Implemented JWT-based role authentication, strengthening access control and overall platform security and reducing code and database complexity.
- Optimized database queries and caching using ORM, reducing API response time by 40%.
- Integrated real-time webhook updates, enhancing workflow transparency and user experience.
Yoav N.
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.
Ilja L.
Last position:
Software Engineer/Architect (Tech Lead) at Mercedes-Benz Tech Innovation GmbH
- Implementation of various interfaces for subsystems and connection to external devices (cameras, scanners, digital lockers)
- Development of various interfaces in the used cars area
- Realization of various prototypes
- Support in UI/UX and data analytics
- Development of frontend and backend solutions
- Kubernetes migration
- Building CI/CD pipelines
- Communication with the business unit and technical design of new solutions
- Cross-team alignment and coordination within the team
- Overview of the entire technology stack and related systems
- Documentation, preparation, and conducting of reviews
- Supporting the team and coordinating releases and key milestones
Discover over 15,000 top freelancers
Statistics of experts using Object-Oriented Programming
Aggregated from the professional profiles of matched freelancers.
Experience
22 years
Position duration
2.7 years (Germany: 3.2 years)
Positions per freelancer
13 (Germany: 15)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Healthcare
Certification focus areas
Information Technology, Product Development, Business Intelligence
Bachelor's degree or higher
67% (Germany: 89%)
Master's degree or higher
17% (Germany: 61%)
Certifications per freelancer
3
Most common languages
German, English, Spanish
Speak two or more languages
100% (Germany: 95%)
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 Dortmund 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 Dortmund 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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Object-Oriented Programming 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%)
- Banking and Finance (57%)
- Healthcare (57%)
- Telecommunication (57%)
- Retail (43%)
- Aerospace and Defense (29%)
- Automotive (29%)
- Insurance (29%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Core concept
Object-Oriented Programming, often called OOP, structures software around objects that combine data with the behavior that acts on it. Classes define reusable blueprints, while encapsulation protects internal state and clear interfaces control how components interact. Inheritance and polymorphism can support variation without duplicating core logic.
What it builds
OOP is used for long-lived software where a clear domain model and controlled change matter. It supports business applications, desktop software, embedded systems, games, APIs and service-based backends. Typical deliverables include:
- Domain models for complex business processes
- Reusable libraries, frameworks and application components
- Testable services with clear interfaces
- Refactoring plans for growing codebases
Ecosystem and tooling
Strong OOP practice appears in Java, C#, C++, Python, Ruby, Kotlin, Swift and PHP, with language-specific conventions and type systems. Specialists commonly work with IDEs, package managers, build pipelines, version control, automated testing and static analysis. Design patterns, UML, dependency injection and SOLID principles help keep larger systems understandable.
When companies need it
Companies often bring in freelance expertise when a codebase has become difficult to extend, a new product needs a stable domain model, or several teams must share components. External specialists can also support migrations from procedural code, modernize legacy applications and establish testing or review practices. In Dortmund, this can suit projects that combine local product teams with remote professionals across Germany.
Signs of strong expertise
Quality is visible in the structure and behavior of the delivered software, not in the number of patterns used. Look for specialists who explain trade-offs, keep abstractions proportionate and make dependencies easy to replace. Useful signals include:
- Clear boundaries between domain, application and infrastructure concerns
- Focused classes with explicit responsibilities
- Tests that cover behavior rather than implementation details
- Practical refactoring supported by readable documentation
Working with specialists
A productive engagement starts with the language, runtime, existing architecture and business constraints. Share representative code, expected interfaces, release conditions and technical risks before defining the deliverable. Remote collaboration works well when reviews, decisions and ownership are documented; on-site work may help when specialists must pair closely with a Dortmund team or understand physical systems.
Frequently asked questions
Need clarity? These are the questions we hear most often about Object-Oriented Programming.
Object-Oriented Programming is used to organize software around objects that hold state and behavior. It is common in business applications, APIs, games, desktop tools, embedded software and systems that need to evolve over time.
Object-Oriented Programming groups behavior with the data it operates on, while functional programming emphasizes pure functions and immutable data. Many modern languages support both approaches, so the right choice depends on the domain, team skills and complexity of the system.
A strong OOP specialist should understand software architecture, automated testing, version control and code review. Experience with APIs, databases, design patterns, dependency injection and continuous delivery is also useful when the work involves a production system.
The required depth of Object-Oriented Programming depends on the codebase and the risks involved. A small feature may need solid language knowledge, while a legacy migration or complex domain model calls for someone comfortable with architecture, refactoring and technical decision-making.
Object-Oriented Programming work is often well suited to remote collaboration because code, tests and design decisions can be reviewed online. Regular technical discussions, shared documentation and clear ownership are important, especially when a Dortmund team works with specialists elsewhere.
Object-oriented design can add unnecessary structure to small scripts, data transformations or highly mathematical workloads. A specialist should be able to recommend procedural or functional techniques when they make the system simpler and easier to verify.
Ask an OOP freelancer to explain the boundaries, dependencies and trade-offs in a representative project. Review how they handle testing, changing requirements and failure cases, rather than judging quality by the number of patterns or abstractions they use.
Object-Oriented Programming is central to ecosystems such as Java, C#, C++, Python, Kotlin, Swift, Ruby and PHP. The best language match depends on the existing runtime, libraries, deployment environment and skills already present in the team.
The average hourly rate of freelancers in Dortmund, Germany who have used Object-Oriented Programming in their recent projects is 82 €, which corresponds to a daily rate of about 656 € based on an 8-hour working day.
Of the freelancers in Dortmund, Germany who have used Object-Oriented Programming in their recent projects, 67% hold at least a Bachelor's degree and 17% hold at least a Master's degree.
On average, freelancers in Dortmund, Germany who have used Object-Oriented Programming in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 2.7 years.
The most common languages among freelancers in Dortmund, Germany who have used Object-Oriented Programming in their recent projects are German (100%), English (100%), and Spanish (14%).
The most common industries among freelancers in Dortmund, Germany who have used Object-Oriented Programming in their recent projects are Information Technology (100%), Banking and Finance (57%), and Healthcare (57%).
The most common business areas among freelancers in Dortmund, Germany who have used Object-Oriented Programming in their recent projects are Information Technology (100%), Product Development (86%), and Project Management (57%).
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.
Berlin 
Hamburg 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Dusseldorf 
Nuremberg 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
