
Object-Oriented Programming Expert
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Meet FRATCH Experts who have recently used Object-Oriented Programming
Wolfgang O.
Last position:
Project Manager at EnBW - Netze Südwest
- New development and further development of the existing MS Dynamics CRM
IT systems: Microsoft Dynamics Customer Service, SharePoint, DevOps, SAP IS-U
- CRM implementation / further development
- Taking over from the previous service provider
- Business process analysis
- Agile project organization
- Business analysis / requirements engineering with AI support
- Use of AI in development
- Analysis of master data processes
- CRM customer data management
- Requirements documentation
- Stakeholder management
- Workshop moderation
Khalid E.
Last position:
Lead Architect & Developer at kem-consulting
Development of an agent-based governance platform for the automated assurance of EU AI Act compliance and ODA-compliant orchestration of AI services in complex enterprise environments.
Design and implementation of an agent-based "Mission Control" framework (Aletheia Conductor) for autonomous state monitoring and process control.
Development of "Compliance-as-Code" (CaC) solutions based on OPA/Rego for system-wide enforcement of regulatory guardrails.
Integration of TM Forum ODA standards (TMF630, TMF622, TMF642) to ensure interoperability and standardization.
Building a highly available event-driven architecture using Redpanda and CloudEvents v1.0 for near-real-time event processing.
Implementation of an audit-proof "Evidence Chain" through cryptographic linking of trace logs in preparation for automated audits.
Tech Stack: Java 21 (Quarkus Native), TypeScript (Next.js), Redpanda (Kafka API), CloudEvents v1.0, OPA (Open Policy Agent) & Rego, TimescaleDB, ZincSearch, Redis, TM Forum ODA, Git, GitHub, Clean Code Development, Like-C4.
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
Muhammad Tanveer B.
Last position:
Embedded Systems Consultant / Architect | Integration and Validation Engineer / Manager at Ingenieurbüro Baig
Led the hardware development and validation of a safety-critical 400-V battery management system (BMS) for the TOGG SUV program; performed system architecture reviews, schematic validations, EMC and reliability tests, and root cause analyses in compliance with relevant automotive standards (ECE-R10, CISPR25, ISO-26262). Coordinated cross-country EU engineering teams, customer reviews, and technical documentation to deliver a production-ready, validated system.
Architected and integrated 22 state-of-the-art ADAS validation vehicles for BMW ADCAM and LIDAR programs at Magna Electronics; synchronized up to 26 heterogeneous sensors (LIDAR, RADAR, cameras, GNSS/INS) using PTP-based timing architectures. Defined the system architecture, HW/SW interfaces for hardware-in-the-loop (HIL) rework, sensor integration strategies, and data acquisition frameworks. This enabled scalable vehicle-level validation, improved validation efficiency by 25%, and reduced project costs by €1.45 million.
End-to-end validation and integration of automotive radar platforms for a Daimler project at Continental. Developed automated open-loop hardware-in-the-loop (HIL) environments to accurately test target tracking KPIs, field-of-view limits, and thermal and voltage-related ECU state machines. Skilled use of a highly complex toolchain consisting of CANoe, Lauterbach Trace32, RADAR target simulators, and EMC shielding chambers for RF and system validation. Synchronized global, interdisciplinary teams to speed up troubleshooting and close critical technical gaps.
Reconstructed and validated the product architecture of an electromechanical e-bike by integrating and troubleshooting critical subsystems (BMS, motor control, sensors, HMI, electronic locking systems). Built a comprehensive system-level test bench for functional testing, fault reproduction, and performance analysis; coordinated suppliers and implemented corrective actions to improve reliability and traceability.
Defined the system architecture and validation strategy for a LIDAR platform developed in cooperation with Elmos Semiconductor; evaluated optical measurement concepts, SPAD detector integration, and system requirements, and created technical recommendations for product development and verification.
Developed LabVIEW-based automation and verification software for a high-precision hydraulic and electromechanical test system for FTE Automotive; integrated NI DAQ hardware for high-frequency real-time capture of physical measurements. Developed automated test sequences, programmable endurance tests, troubleshooting routines, data logging, and analysis tools to improve test efficiency and traceability.
Successfully delivered full engineering life cycles for well-known industrial customers (Magna, Continental, Farasis, FTE Automotive, BMW, Daimler, TOGG) – from requirements engineering and proof of concept to system integration and validation, technical documentation, supplier coordination, and user training.
Hans-Dieter G.
Last position:
Training as an AI Expert
I continuously expand my expertise in AI and automation. I work with ChatGPT, OpenAI, Manus, Gemini, MS CoPilot, APIs, LangChain, Hugging Face, Manus, TensorFlow, and Auto-GPT, as well as Python-based ML frameworks and MLOps tools, to intelligently transform traditional software development, analysis, and testing processes.
Harold T.
Last position:
CPU Watcher — Cloud-Native Monitoring Application at SEUYTEL
- Planned and developed a CPU monitoring application for monitoring system performance and resource utilization.
- Designed and implemented a Spring Boot backend providing a REST API for processing and exposing monitoring data.
- Developed the React frontend for presenting monitoring information in a clear and user-friendly interface.
- Integrated PostgreSQL for persistent storage and management of application data.
- Containerized the application and its services using Docker Compose.
- Automated infrastructure provisioning and deployment using Terraform on AWS.
- Structured the application as a modern, maintainable system using REST-based communication between frontend and backend.
- Designed and developed a secure, scalable CPU monitoring architecture (cpu-watcher) with a dedicated collector application that streams monitoring data to the backend, reducing direct exposure of system resources.
- Designed a secure cloud infrastructure with the database isolated within a private network and OIDC-based authentication.
- Implemented Infrastructure as Code with Terraform and integrated version-controlled CI/CD pipelines to automate testing, infrastructure changes, and application deployments.
- Designed and implemented the frontend delivery architecture using AWS CloudFront.
Stack: Spring Boot · React · PostgreSQL · REST API · Docker Compose · Terraform · AWS
Fadi S.
Last position:
Development of a production-ready Enterprise Document AI & Recommendation Platform at Freelancer
- Development of a production-ready Enterprise AI solution for the automated processing of invoices and business documents
- Integration of Azure AI Document Intelligence and LLM technologies into existing business processes
- Development of robust REST APIs for automated document processing and system integration
- Extraction, validation, and storage of structured invoice data in Azure SQL as a base for analytics and machine learning models
- Development of an AI-based recommendation engine with machine learning and deep learning to generate personalized product recommendations based on historical purchase data
- Implementation of logging, monitoring, error handling, and validation mechanisms for stable production use
- Collaboration with business teams to define business rules and integrate the solution into existing enterprise processes
Technologies: Python, Azure AI Document Intelligence, Azure OpenAI, Azure SQL Database, REST APIs, Machine Learning, Deep Learning, OCR, Pandas, JSON, Workflow Automation
Christian P.
Last position:
Project Manager at Kreis Segeberg
- WiNOWiG enhancements (digitalization & organization)
- Project management for the WiNOWiG project (regulatory offenses)
- Process optimization and coordination
Michael N.
Last position:
Senior AI Engineer | Forward Deployed Engineer at Tiefbau
- Development of an AI-powered project organization tool for a civil engineering company that intelligently links project, task, tender, schedule, and document data through a knowledge graph.
- Implementation of AI features for document analysis, information extraction, context-based assistance, and voice-based data capture based on Microsoft Azure AI, reducing administrative effort, making information available faster, and supporting project teams in decision-making.
- Tech stack: Python, React, TypeScript, FastAPI, Claude Code, Codex, Graphify, PostgreSQL, Microsoft Azure AI Foundry, Azure OpenAI, Azure AI Speech, Azure AI Document Intelligence, Microsoft Graph, Microsoft Entra ID, Docker, Git, CI/CD.
Maciej S.
Last position:
Product Owner at Bundesagentur für Arbeit
- As part of the project, the further development of the identity management system was driven forward. This included a comprehensive refactoring of the interfaces to the connected target systems. In addition, several special systems were successfully connected to the IAM to ensure end-to-end identity and authorization management.
- Technical design and solution proposals for IAM system development
- Requirements analysis and requirements management (IREB, BABOK)
- Alignment of the strategy with the future target architecture (TOGAF)
- Prototyping of solutions
- Documentation of requirements (Innovator)
- Analysis and documentation of requirements and creation of process models (UML, BPMN, ArchiMate)
- Modeling of requirements and system functionalities (OOA/OOD, UML)
- Further development of interfaces (SOAP, REST)
- Carrying out architecture reviews
Tobias S.
Last position:
Project Manager SAP S/4 HANA Public Cloud at TIMETOACT Group
To achieve savings and optimize compliance, apps were restructured in line with the mappings in identity management, restrictions were defined and, above all, costs resulting from overuse were reduced. Communication with stakeholders, validation of authorizations with users and technical implementation in the SAP FI/CO and Sourcing & Procurement modules created significant added value for the group. This also included the corresponding documentation for the auditors.
Dorin L.
Last position:
Release Train Engineer, Program Lead & Transformation Consultant - Freelancer at Telefónica Germany
- Transformation Consultant, Release Train Engineer and Program Lead – responsible for the new Way of Working in the Open Gateway Program; optimizing the flow of value by ensuring the ART events and artifacts function correctly, including the Open Gateway Release Train Kanban, Inspect & Adapt (I&A) workshop, ART Sync Meetings, and PI Planning to ensure stakeholder alignment;
- Coaching and guiding the Product Owners, Business Owners, Product Management, Program Managers, Leaders, Tribe Architect
- Coaching the OGW Core Team (cross functional) within the OGW Program and developing optimization measures in their transformation process;
- Facilitating and working actively towards the creation of the Definition of Ready (DoR) and the product Definition of Done (DoD);
- Introducing knowledge sharing workshops and grow the agile engineering practices;
- Hold Team lift-off workshops;
- Help the group to become a team by providing system team coaching and multifunctional learning;
- Facilitate, decision making, feedback loops for learning new skills and practices
Tools: JIRA, Confluence, MS Teams, Miro
Mladen B.
Last position:
Senior SAP BW/4HANA / BPC / SAC Consultant – Freelancer at Company in Berlin and Belgium in the utilities sector
- Implementation of data models in BW/4HANA, ABAP CDS Views, HANA Calculation Views, AMDP Scripts, OData Services, object-oriented ABAP in BW, SAC.
- Adjustments in BPC for BW/4HANA.
Peter F.
Last position:
Subproject Manager and Solution Architect - Microsoft 365 Transformation at Automotive Industry
Integration of highly regulated countries such as China and South Korea into a company-wide M365 tenant.
Technical contact for integrating special requirements for the executive board and German subsidiaries that are subject to BaFin compliance requirements.
Subproject management.
Coordination of requirements within the overall architecture.
Design of the use of DLP features from Microsoft Purview.
Design of special access restrictions via Entra ID Conditional Access.
Support in designing the provisioning of Teams teams and SharePoint sites with higher compliance requirements.
Technical support for implementing information classification with sensitivity labels for SharePoint Online and Teams.
Technical support for the subproject introducing CoPilot for M365.
Skills: M365, Purview, DLP, Entra ID, Sensitivity Labels, CoPilot, Teams, SharePoint Online.
Volker F.
Last position:
Technical Lead | Software Architect | Embedded Software Engineer at Hydac
- Development of safety-related embedded software for a mobile machine on a Hydac TTC 2390 controller.
- Implementation in C with consideration of SIL 3 / ASIL D and MISRA-C:2025.
- Implementation of communication via CAN, CANopen, and J1939.
Standards, guidelines and norms: ISO 26262, IEC 61508, MISRA-C:2025
Technologies: C99, Hydac TTC 2390, Infineon TriCore Aurix TC397, Hightec C/C++ Compiler, PC-lint Plus, CAN, CANopen, J1939, MISRA-C:2025
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
3.2 years

Positions per freelancer
15

Top business areas
Information Technology, Product Development, Project Management

Top industries
Information Technology, Banking and Finance, Manufacturing

Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
88%
Master's degree or higher
59%
Doctorate
8%

Certifications per freelancer
3

Most common languages
German, English, French

Speak two or more languages
95%
Based on our profile pool as of 26 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology 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 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 26 Sep 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 (95%)
- Banking and Finance (51%)
- Manufacturing (45%)
- Automotive (45%)
- Healthcare (34%)
- Education (34%)
- Telecommunication (34%)
- Professional Services (34%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Core principles
Object-Oriented Programming, often called OOP, structures software around objects that combine data with the behavior that operates on it. Classes define shared structure, while encapsulation protects internal state and inheritance or composition supports reuse. Polymorphism lets different objects respond through a common interface.
What it builds
OOP is used for business applications, desktop software, mobile apps, games, APIs and large backend systems. It is especially useful when a product has rich business rules, many related entities or a long maintenance horizon. Good object models make changing one part of a system less likely to break another.
- Model domains such as orders, accounts, products and workflows
- Build reusable application services and user interfaces
- Connect business logic to databases, APIs and messaging systems
- Refactor legacy code into clearer, testable components
Languages and tools
Experts work with OOP languages such as Java, C#, C++, Python, Ruby, Kotlin, Swift and PHP. Their tooling may include Spring, .NET, Django, Rails, Qt, Android SDKs and game engines. They also use Git, automated testing, package managers, build pipelines and code analysis tools to keep systems reliable.
When to hire specialists
Companies bring in freelance OOP specialists when a new product needs a coherent domain model, an existing codebase has become difficult to change or a team needs specific language expertise. They can establish coding standards, design interfaces, introduce testing and guide a migration from procedural or tightly coupled code. Remote collaboration works well when documentation, reviews and ownership are clear.
- A growing codebase has duplicated or tangled logic
- New features require changes across unrelated modules
- Tests are difficult to write because responsibilities are mixed
- A team needs support with Java, .NET, C++ or another OOP ecosystem
What strong experts deliver
Strong professionals choose composition over unnecessary inheritance and keep each class focused on a clear responsibility. They understand SOLID principles, design patterns, dependency injection, domain-driven design and test-driven development without applying them mechanically. Their deliverables include clear designs, readable code, useful tests and documentation that helps the team maintain the system.
Choosing the right fit
Assess how a specialist reasons about trade-offs, not how many patterns they can name. Review examples of refactoring, API or domain design, testing strategy and performance decisions. Discuss the language, framework, architecture and delivery constraints early, then use a practical technical conversation to check whether the expert can explain choices in terms of business behavior and long-term maintenance.
Frequently asked questions
Questions about Object-Oriented Programming? Start with the answers below.
Object-Oriented Programming is used to structure software around objects that represent data and behavior together. Companies use OOP for business systems, APIs, mobile and desktop applications, games and other products that need maintainable domain logic.
OOP groups state and behavior into objects, while procedural programming organizes logic mainly as procedures that operate on data. Either approach can work well; the right choice depends on domain complexity, team familiarity, performance needs and the existing codebase.
Object-Oriented Programming supports both composition and inheritance, but composition is often safer for changing systems. It combines small, focused objects without creating rigid class hierarchies, while inheritance remains useful when the subtype relationship is clear and stable.
A strong OOP specialist should also understand software architecture, relational databases, APIs, automated testing and version control. Depending on the project, useful adjacent skills include cloud services, CI/CD, messaging, security and a specific ecosystem such as .NET or Spring.
Object-Oriented Programming projects do not need a fixed level of experience because scope and risk vary widely. A small feature may need focused language knowledge, while a large domain model, legacy refactoring effort or high-availability system calls for deeper architecture and testing judgment.
OOP specialists can work remotely when the team shares clear design records, coding conventions and review practices. Regular discussions around interfaces, ownership and domain behavior are more important than being in the same location, though on-site workshops may help with complex legacy systems.
Evaluate how an Object-Oriented Programming expert explains boundaries, dependencies, testing and trade-offs. Ask them to review a small design or refactoring example and look for focused responsibilities, readable interfaces, sensible use of patterns and attention to future change.
Before starting OOP work, clarify the target language, framework, architecture, deployment model and condition of the existing codebase. Also confirm the expected deliverables, testing standards, review process and who owns domain decisions, because these factors shape the design more than terminology alone.
The average hourly rate of freelancers who have used Object-Oriented Programming in their recent projects is 94 €, which corresponds to a daily rate of about 751 € based on an 8-hour working day.
Of the freelancers who have used Object-Oriented Programming in their recent projects, 88% hold at least a Bachelor's degree, 59% hold at least a Master's degree, and 8% hold a doctorate.
On average, freelancers who have used Object-Oriented Programming in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 3.2 years.
The most common languages among freelancers who have used Object-Oriented Programming in their recent projects are German (98%), English (95%), and French (20%).
The most common industries among freelancers who have used Object-Oriented Programming in their recent projects are Information Technology (95%), Banking and Finance (51%), and Manufacturing (45%).
The most common business areas among freelancers who have used Object-Oriented Programming in their recent projects are Information Technology (99%), Product Development (92%), and Project Management (62%).
Main locations of FRATCH Experts, who have recently used Object-Oriented Programming
Our freelancers and interim experts are at home all over Germany — available on-site in Berlin, Hamburg, Munich and every major business hub, or fully remote. Choose a city to discover matched specialists, local market insights and up-to-date availability.
In Austria our freelancers and interim experts support companies from Vienna to Graz — on-site where your project needs them, or fully remote. Choose a city to discover matched specialists, local market insights and up-to-date availability.
Across Switzerland our specialists are active in Zurich, Geneva, Basel and Bern — working on-site or fully remote. Choose a city to discover matched specialists, local market insights and up-to-date availability.
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