OData Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used OData
Joaquim L.
Last position:
SAP Senior ABAP Developer
SAP Data Migration Greenfield QM
In the QM module project, the focus was on migrating inspection plans and transferring Dynpro applications from the ECC system to the HANA system while adhering to development guidelines and clean code principles. The project involved the use of technologies and concepts such as ABAP Objects (ABAP OO), Clean Code practices, SMOD/CMOD enhancements, User Exits, Function Exits, BAdIs, interfaces, and classes. Writing complex reports for download and upload of change pointer information of inspection plan header.
Thorsten H.
Last position:
Product Owner, Software Developer, AI Manager, Technical Consultant at crazyALEX.de GmbH
AI-supported document processing and inventory management integration
Design and development of an AI-supported application for the automated processing of delivery and invoice documents, connected to SelectLine ERP. Documents are analyzed using AI, matched with orders and line items, and prepared for posting goods receipts.
IMPACT:
- Automated extraction of structured order, delivery and invoice data from PDF and image documents
- Automatic and manual mapping of documents to orders and order line items
- Integration with SelectLine ERP for order import, status synchronization and goods receipt postings
- Traceable processing through separate analysis, mapping and posting processes as well as technical logging
- Development of a containerized end-to-end architecture with AI analysis, workflow automation and relational data storage
KEYWORDS: AI, document analysis, OpenAI, n8n, SelectLine ERP, FastAPI, Python, JavaScript, MariaDB, Docker, REST API, PDF, OCR, mapping, inventory management, goods receipt, workflow automation
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.
Giuseppe A.
Last position:
Embedded Software Development at Inheco
- AI Integration (LLM & RAG): Designed and built an internal intelligent RAG system (Retrieval-Augmented Generation) based on LLMs, n8n, and vector data to automatically analyze technical documents and error logs.
- Design & Implementation: Designed a robust RS-232/UART communication interface for an SBC-based embedded device used to control medical shaker systems.
- Architecture & Protocol Design: Built a highly maintainable software structure (OOP, SOLID) and defined resilient, hardware-level communication protocols, including multithreading and advanced error handling.
- Quality Assurance & DevOps: Automated testing with xUnit, ran integration tests directly on the hardware target, and maintained technical documentation to strict medical technology standards via Azure DevOps.
Label: C#, .NET, LLMs, RAG, n8n, RS-232, UART, Multithreading, async/await, xUnit, gRPC/protobuf, Blazor, MudBlazor, EF Core, Visual Studio 2026, Azure DevOps
Sabahattin K.
Last position:
Sole responsibility (design, development, infrastructure, operations) at Own project busik.ch
- Ride-sharing and bus platform, live and fully functional. Backend with Spring Boot 4.1 on Java 21, PostgreSQL with Flyway, and Testcontainers integration tests. Hosted in my own AWS account (ECS Fargate, ALB, ECR, IAM Least-Privilege) with CI/CD via GitHub Actions and OIDC federation without static credentials. Development fully AI-supported with Claude Code, including custom skills and project-specific memory. Spring Boot · Java 21 · PostgreSQL · Flyway · Docker · AWS ECS/ALB/ECR · CI/CD · GitHub Actions · Claude Code
Michael K.
Last position:
Salesforce Architect
- Responsible as architect for the entire Service Cloud
- Technical translation of business requirements into User Stories
- Technical design of service processes (After Sales, Complaint, Return Order, Email-to-Case, Case Routing, Sharing)
- Designed and implemented data models for service processes
- Bidirectional integration with SAP S/4HANA for service processes
- Solution Design Reviews across the entire team (Service & Sales)
- Functional leadership of consultants in the sprints, support for junior consultants
- Deployment with Git and SFDX (CI/CD), training of juniors (Naming Conventions, Quality Gate, Flows)
- Support and consulting for administrators (Security, Releases, Bugs)
- Key-user training for rollout countries (Switzerland, Sweden)
- Development of LWC, Flows (Screen, Record-Triggered, Platform Event), APEX Callouts, Batch Jobs
- Proof of Concepts (Knowledge Base, Entitlement, Omnichannel)
- Test setup, execution, and bug analysis of implementations
Andre F.
Last position:
.NET Consultant (Fullstack) at AFri Consulting
Software development with C#
IT infrastructure development and maintenance with Microsoft Azure
Integration of 3rd-party systems
Planning and setting up DevOps CI/CD processes
C# (.net8)
Azure Cloud Services
DevOps
Jira
Dynamics
Odata
Api Management
Key Vaults
ServiceBus
Azure Functions
Blazor
Patrick D.
Last position:
Fullstack Developer
- SPA for automated communication of medical findings with role-based access (Sanctum)
- Server-side LLM integration (OpenRouter) with structured processing
- Automated sending via SMS/voice call (Twilio, ElevenLabs) with queue + status retry
- Full test coverage with 80+ documented test cases
Technologies: PHP, Laravel, LLM API (OpenRouter), Twilio, ElevenLabs, Laravel Sanctum, PHPUnit, Playwright, Docker, REST
Maurice K.
Last position:
Solution Architect – Cloud-Native Transformation of IoT Monitoring Platform at NDA / Wind Energy Sector
- Led the end-to-end architecture and migration of a legacy on- premise IoT monitoring system to a cloud-native Azure platform within a 17-member development team
- Designed and implemented a scalable microservices architecture (Java 21, Spring Boot, Kubernetes, Azure Services), decoupling IoT data streams and eliminating legacy system bottlenecks
- Defined technology stack, mentored developers, and orchestrated cross-functional teams in 4 countries to ensure high-quality delivery and alignment with architectural standards
- Drove requirements engineering and system redesign, removing years of technical debt and introducing event-driven processing and automated workflows
- Key Achievements
- Increased system stability and uptime by ~10x, eliminating need for 24/7 DevOps intervention
- Reduced hosting costs by ~80% (5x savings) through cloud optimization
- Improved performance and scalability, enabling stable handling of high-volume IoT data streams
- Delivered successful zero-disruption migration from on-prem to cloud, with strong user satisfaction and reliability from day one
Bora D.
Last position:
Software Architect at DZ HYP AG
- Lead architect for an enterprise loan digitisation programme, coordinating 12 engineers across five workstreams and serving as final technical authority on system design.
- Cut critical application response times by 68% (display 17.3s → 5.6s; modification 11.8s → 5.0s) through targeted caching, OData query optimisation and lazy-loading refactoring; further optimisation in progress.
- Own production error triage, prioritisation and resolution across a multi-application portfolio supporting live lending operations.
- Design and implement SAP Fiori applications on SAP UI5, TypeScript and RAP, owning delivery from architecture and code through rollout and production support.
- Established C4 architecture documentation and decision records for the full programme, enabling faster onboarding and consistent cross-workstream design governance.
- Co-managed S/4HANA release cycle alongside primary responsibilities, coordinating directly with SAP support to resolve critical system issues across the portfolio.
Sebastian W.
Last position:
Senior SAP ABAP Developer / Solution Architect at Confidential Client
AI-Native S/4HANA Custom Development
Solution architecture and implementation of an extensive SAP S/4HANA custom solution replacing required retail/POS standard functionality directly in S/4HANA.
- Architecture and technical design for inbound, persistence, enrichment, validation, aggregation and outbound processing
- Modular SAP ABAP / ABAP OO implementation based on Clean Core, Clean Code and testability principles
- AI-native development workflow with AI-generated implementation and test code
- Orchestration of specialized AI roles for discovery, planning, development and independent reviews
- Decision Freeze, Build Plans and Quality Gates for controlled AI-based delivery
- Human Design Authority for architectural decisions, SAP validation, technical acceptance and release
IMPACT ACHIEVED:
- Productive use of an AI-native engineering model in a real enterprise SAP project
- Extensive modular custom solution with several hundred SAP development objects
- High maintainability and testability through modular architecture, automated tests and structured reviews
- Replacement of required standard functionality to reduce recurring licensing and operating costs
Georgi L.
Last position:
Techno-functional MM/SD consultant at GLIT Circle GmbH
- Implementation of the S/4HANA transformation (brownfield) at an agricultural equipment manufacturer
- Implementation of the new supplier evaluation in S/4HANA, including programmed technical adjustments to customer-specific processes
- Conducting workshops with business departments on technical and functional changes in S/4HANA, with a focus on P2P processes and approval processes
- Preparation of the new system incl. customizing and conversion of customer-specific ABAP developments to Clean ABAP
Florian S.
Last position:
ABAP/4, ABAP Objects Developer at Migros-Genossenschafts-Bund
- WRICEF objects (Reports, Interfaces, Conversions, Enhancements, Forms and Workflow) in the FI and CO modules of S/4HANA ECC using ABAP OO
- Use of SAP HANA Studio, AIF, SAP Solution Manager, Confluence and Jira
- Environment: SAP S/4HANA on Premise 2020
Philipp D.
Last position:
IT Architect & IT Product Manager at Dr. Ing. h.c. F. Porsche AG
- Optimization of software lifecycle processes for SAP platform apps (BTP CAP)
- Development of template MCP servers for S/4 CALM systems of Porsche AI (BTP)
- Design, development, and IT product management for two MS CoPilot custom agents supporting SAP systems (incl. MCP integration)
- Lead Center of Practice: AI-assisted ABAP development
- Initiation and coordination of the proof of concept implementation of conduct.ai
- Advising application teams on software and integration architecture, clean core principles and implementation, as well as AI use on the SAP platform
Matthias O.
Last position:
Freelance work at Etengo (für Syna AG)
Consulting in the SAP EAM module as part of the migration to EON's S/4 HANA oneERP system
Review and cost estimation of customer-specific developments (e.g. cockpit for EAM orders, document flow display)
Preparation of EAM classification data for technical objects (functional locations, equipment) for migration to new classes
Discover over 15,000 top freelancers
Statistics of experts using OData
Aggregated from the professional profiles of matched freelancers.
Experience
19 years
Position duration
2.1 years
Positions per freelancer
17
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Manufacturing, Professional Services
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
81%
Master's degree or higher
51%
Doctorate
13%
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
94%
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 Germany 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 Germany using OData
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.
OData 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 (91%)
- Manufacturing (64%)
- Professional Services (58%)
- Automotive (49%)
- Banking and Finance (48%)
- Retail (43%)
- Transportation (40%)
- Energy (39%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Standardized Enterprise API Design
Open Data Protocol defines standard practices for building and consuming RESTful APIs without custom query plumbing. It provides uniform conventions for resource filtering, pagination, sorting, and entity relationship navigation. Enterprise systems rely on this protocol to expose transactional data models safely over HTTP.
Core Ecosystem and Framework Support
The specification underpins key enterprise software platforms across international and German corporate landscapes. SAP uses it natively for SAP S/4HANA, SAP Fiori, and SAP Business Technology Platform connectivity. Microsoft integrates the standard heavily within Microsoft Graph, ASP.NET Core, Dynamics 365, and Power Platform connectors.
Typical Project Engagements
- Implementing custom SAP Gateway services using Core Data Services views
- Designing ASP.NET Core web services that expose complex entity frameworks
- Exposing S/4HANA backend business logic to custom React and Angular frontends
- Automating data pipelines between Microsoft Dynamics and third-party systems
- Migrating legacy SOAP and RFC interfaces to structured REST endpoints
When Organizations Hire External Support
Companies often lack internal capacity when modernizing core business processes or migrating on-premises SAP landscapes to the cloud. External specialists resolve complex metadata issues, streamline batch requests, and tune slow entity sets. Dedicated support helps enterprise architecture teams deliver modern integration layers without overhauling core transactional systems.
Critical Technical Capabilities
Proficient specialists understand entity data models, vocabulary annotations, and JSON payload optimizations. They design performant backend providers that translate URI query options directly into database operations without loading unnecessary rows. They also secure endpoints using OAuth, handle enterprise authentication, and manage concurrency using ETags.
Engineering Context Across Germany
German automotive, manufacturing, and logistics companies depend heavily on enterprise platforms that run on this protocol. Projects frequently require bilingual delivery in German and English, blending remote implementation sprints with strategic on-site alignment meetings. Specialists ensure strict compliance with corporate data protection standards and enterprise system governance.
Frequently asked questions
Quick answers to the questions that come up most around OData.
OData is used to create queryable RESTful APIs that provide standard URL conventions for sorting, filtering, and paging through business data. It allows client applications to request precisely the properties and related entities they need, which dramatically reduces custom backend endpoint development.
While both technologies allow clients to request selective data sets, Open Data Protocol is built strictly on REST principles and HTTP conventions. GraphQL uses its own query language over a single POST endpoint, whereas an OData implementation natively integrates with enterprise ERP systems and standard HTTP tooling.
SAP established OData as the standard communication layer between backend systems and modern SAP Fiori or UI5 frontends. Strong specialists use SAP Gateway and Core Data Services to expose transactional business objects cleanly to external systems.
The standard is widely supported by ASP.NET Core through Microsoft libraries, by SAP CAP and ABAP environments, and by Java through Apache Olingo. An experienced OData professional understands how to map these libraries directly to relational databases for high-throughput performance.
Evaluate their grasp of query optimization, batch operations, and metadata modeling. Top OData specialists ensure that operations like filter and expand are delegated directly to the database rather than processed inefficiently in application memory.
A qualified professional usually brings strong proficiency in ABAP, C#, or TypeScript, along with deep knowledge of database indexing and RESTful API security. In SAP projects, familiarity with SAP BTP and CDS views is indispensable.
Most OData integration projects across Germany run in hybrid models, where core development is fully remote while kickoff sessions and architectural sign-offs occur on site. Regulated sectors like manufacturing and financial services often value local experts who are familiar with strict corporate compliance protocols.
While source code and API metadata are written in English, enterprise teams in Germany frequently manage functional requirements in German. An Open Data Protocol professional who communicates comfortably in both languages speeds up coordination with internal business process owners.
The average hourly rate of freelancers in Germany who have used OData in their recent projects is 101 €, which corresponds to a daily rate of about 804 € based on an 8-hour working day.
Of the freelancers in Germany who have used OData in their recent projects, 81% hold at least a Bachelor's degree, 51% hold at least a Master's degree, and 13% hold a doctorate.
On average, freelancers in Germany who have used OData in their recent projects have 19 years of professional experience, with a single engagement typically lasting around 2.1 years.
The most common languages among freelancers in Germany who have used OData in their recent projects are German (99%), English (94%), and French (18%).
The most common industries among freelancers in Germany who have used OData in their recent projects are Information Technology (91%), Manufacturing (64%), and Professional Services (58%).
The most common business areas among freelancers in Germany who have used OData in their recent projects are Information Technology (100%), Product Development (79%), and Quality Assurance (61%).
Main locations of FRATCH Experts, who have recently used OData
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 
Munich Request a free demo
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Philipp Thomaschewski
FRATCH CEO
