MediatR Experts in Germany
for clean application workflows, matched in minutes with vetted specialistsHire experts who structure request handling with MediatR, design commands and queries through CQRS, and connect application logic with ASP.NET Core services. Get precise access to vetted, available freelancers who match your project quickly.
Meet FRATCH Experts in Germany, who have recently used MediatR
Jorge N.
Last position:
Senior Developer at SafeXSmart KI Solutions UG
AI Platform Backend – Senior Developer
Brought in to design and build a backend for an AI platform from scratch, including multi-provider LLM orchestration and real-time infrastructure for AI influencer personas at scale.
Tasks and responsibilities
- Architecture and implementation of a multi-LLM orchestration layer with Semantic Kernel to integrate GPT-4 and other providers for core platform logic and AI influencer personas, reducing model-switching overhead by abstracting provider APIs behind a single interface.
- Design and development of a backend from scratch in C# / .NET 10, including domain modeling with DDD, a versioned RESTful API layer, and cloud infrastructure setup on Azure.
- Built a real-time chat infrastructure with Server-Sent Events (SSE), message persistence, and delivery guarantees for live operation of AI influencer personas at scale.
- Developed a media management service with integration of cloud object storage for upload and retrieval of influencer-generated content.
- Created an integration and unit test suite with data seeding for reliable regression testing across all core platform flows, significantly reducing production error rates.
Tools and technologies: C#, .NET, ASP.NET Core, Python, TypeScript, MySQL, Semantic Kernel, EF Core, Minimal APIs, LLM Orchestration, Prompt Engineering, Agentic AI, Generative AI, AI-Assisted Engineering, Claude Code, GitHub Copilot, Google Gemini, OpenAI API, Ollama, Redis, Azure, Azure Container Apps, Azure Database for MySQL, Docker, GitHub Actions, Clean Architecture, Vertical Slice Architecture, CQRS, Domain-Driven Design, REST API, xUnit, Integration Testing, Unit Testing, Jira, Confluence, Scrum
Giuseppe A.
Last position:
Embedded Software Developer at Inheco
- AI Integration (LLM & RAG): Design and build of an internal intelligent RAG system (Retrieval-Augmented Generation) based on LLMs, n8n, and vector data for the automated analysis of technical documents and error logs.
- Design & Implementation: Design of a robust RS-232/UART communication interface for an SBC-based embedded device to control medical shaker systems.
- Architecture & Protocol Design: Implementation of a highly maintainable software structure (OOP, SOLID) and definition of hardware-close, resilient communication protocols including multithreading and advanced error handling.
- Quality Assurance & DevOps: Test automation using xUnit, integration tests directly on the hardware target, and maintenance of technical documentation according 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
Oliver F.
Last position:
Modernization of a multi-company backend system at Energy utility company
Enhancement and modernization of a mature Aspire backend application in the environment of a utility company, focusing on new business requirements, testing, legacy code cleanup, and stable backend delivery.
Core contributions & results Implemented new business requirements in the context of customer orders, subcontractors, and cross-company backend processes, and ensured consistent workflows in a distributed system landscape. Modernized existing backend components step by step and reduced technical debt through targeted legacy code cleanup, refactoring, and structured code reviews. Improved the testability of business-critical services by expanding automated tests with xUnit, AutoFixture, and clearer validation structures. Supported the further development of workflow automations and integration processes via microservices, messaging, and API-based communication. Took over source code from external firms, systematically checked code quality, and derived technical improvements for maintainability, stability, and integration. Worked in agile development processes with Jira, Confluence, and Azure DevOps and supported cross-team alignment on architecture, quality, and implementation. Technical metrics Technologies & methods C#, .NET, ASP.NET, ASP.NET Core, Aspire, Docker, RabbitMQ, gRPC, REST API, Swagger, Microservices, NServiceBus, AutoMapper, Autofac, xUnit, AutoFixture, FluentValidation, Entity Framework Core, MediatR, Redis, Consul, Serilog, SonarQube, Azure DevOps, Azure Monitor, GitLab, Google Protocol Buffers, IronPDF, Mailjet, Jira, Confluence, Miro, agile development, Scrum, code reviews, refactoring, legacy code cleanup, workflow automation, power grids
Hicham M.
Last position:
Freelance Software Developer at Buhl Data Service GmbH
- Backend development: .Net 8, C#, PostgreSQL, Entity Framework Core, REST Web APIs, Docker, Kubernetes, Kafka, Open API Swagger, Apache Airflow, Resharper, Git, Microservices, SOAP, gRPC, Hangfire, OAuth 2, GraphQL
- Interface development for document processing with SmartFix, Softexpansion and Natif.ai: C#, REST API, Resharper, Git
- Deployment: Azure DevOps YAML, Vanilla Helmchart, Rancher, Kubernetes Cluster, Linux Docker, Windows VM, Python
- Unit tests and integration tests
- Telemetry, Kibana, Grafana, Elastic Search
- Work in a Kanban team of 8 developers, 1 tester and one Product Owner
Martin H.
Last position:
Software Architect at Hays AG
- C# development in .NET 8.0
- Technical responsibility for architecture decisions (DDD, Clean Architecture, microservices)
- Introduction and systematic evaluation of GitHub Copilot, analyzing efficiency benefits, identifying suitable use cases, assessing code quality
- Developing best practices for using Copilot in the team, supporting rollout and coaching individual developers
- Conducting code reviews, architecture documentation according to Arc42
- Building stable CI/CD pipelines with Azure DevOps, introducing automated quality checks with SonarQube and .editorconfig
- Collaborating with stakeholders for continuous improvement of technical concepts
- Technologies used: Azure DevOps Server, Git, SonarQube, Visual Studio 2022, Sparx EA 17, Nagios LS, Nagios XI, C#, ReSharper 2.24.3, Clean Architecture, DDD, EF Core, Arc24, microservices, Angular, MediatR, SignalR, Copilot, OpenAI
Glenn K.
Last position:
Lead Software Architect at knowledgepark GmbH
- Leading an eight-member team with a focus on actively promoting an agile mindset
- Supporting the introduction of Scrum within the team
- Planning, designing, and implementing the macro architecture of a distributed system landscape
- Documenting self-contained systems, microservices, and legacy applications
- Integrating third-party software components
- Special attention to scalability and reliability
- Ensuring traceable processes through event sourcing
- Developing multiple ASP.NET and Blazor applications in C# using .NET 5 to 8
- Applying strategic methods from Domain-Driven Design (DDD)
- Decoupling modules using the Mediator pattern (MediatR) and CQRS
- Continuously ensuring code quality through Test-Driven Development (TDD)
- Conducting code reviews via pull requests and pair programming
- Optimizing data storage and access with MS SQL Server, Redis, and EF Core
- Reducing costs and wait times through caching and automatic scaling
- Implementing background jobs using Hangfire
- Developing and integrating REST APIs
- Integrating RabbitMQ and NServiceBus for communication between systems
- Securing various REST APIs and web UIs with OAuth2/SAML/SSO and JWTs
- Developing cross-team technology standards
- Introducing architecture methods in agile teams
- Applying software craftsmanship and Extreme Programming (XP) principles
- Ensuring software quality according to ISO 25010 standards
- Implementing DevSecOps practices
- Migrating various legacy on-premises applications (Azure Stack & IIS) to Azure Cloud
- Modernizing existing application (from .NET Framework 3 & 4)
- Leading containerization with Docker and subsequent migration to Kubernetes
- Introducing and optimizing CI/CD pipelines
- Monitoring production systems using Serilog, Prometheus, Grafana, and Application Insights
- On-call duty and implementing automated error detection
- Analyzing and fixing issues in production as 3rd level support
- Coaching and upskilling working students, interns, and other developers
- Designing and delivering internal training sessions
- Conducting event storming and user story mapping sessions
- Supporting the product owner with technical matters
- Optimizing workflows in Azure DevOps Services
- Requirements engineering in cooperation with relevant business units and domain experts
Patrick S.
Last position:
Senior Software Engineer at Delivery Hero
- Led a team of 6 software engineers to develop and maintain an AI-driven healthcare platform, enabling automated diagnostics and prescriptions based on real-time ECG data analysis
- Designed and developed a robust Revenue Cycle Management (RCM) system, integrating HL7 and FHIR APIs to enable seamless interoperability, real-time data exchange, and HIPAA-compliant data handling, improving billing efficiency, claim processing, and regulatory adherence in healthcare operations
- Migrated a legacy monolithic application to a scalable microservices architecture, enhancing system modularity, scalability and maintainability while implementing key design patterns such as Strangler, Database-per-Service, API Gateway, Saga and CQRS for efficient service communication and transaction management
- Architected and led a C# 9/.NET 6 microservices ecosystem handling hotel reservations, payments, and loyalty programs, enabling 99.99% uptime across 10+ services
- Defined OpenAPI/Swagger contracts and auto-generated client SDKs, reducing front-to-backend integration time by 50%
- Containerized each service with Docker and orchestrated deployments via Kubernetes, slashing release lead time from days to hours
- Designed PostgreSQL schemas optimized for high-volume transactional workloads and implemented Redis caching layers to accelerate read-heavy endpoints by 80%
- Built Kafka streaming pipelines for real-time availability updates and audit logs, processing 2 million+ events per hour with end-to-end delivery guarantees
- Implemented unit and integration tests for React applications using Jest and React Testing Library, ensuring 80%+ test coverage, improving component reliability, and preventing regressions
- Defined and deployed AWS cloud infrastructure using Terraform, while containerizing and orchestrating microservices with Docker and Kubernetes, improving automation and system scalability
- Built a scalable full-stack booking application using React 18 and Django REST Framework, integrating Celery and Redis for asynchronous task processing, while deploying on GCP with Cloud Run and Firestore, enabling real-time scheduling, payment processing, and automated notifications
- Mentored junior developers through code reviews, pair programming, and knowledge-sharing sessions, improving team efficiency by 30% while maintaining comprehensive API documentation using Swagger/OpenAPI
Dirk V.
Last position:
Fielmann AG
- New and further development of a microservice architecture for managing eyeglass insurance and handling employee purchases
- Angular 19, .NET 9, Kubernetes, Docker, Hangfire, Redis, MediatR, PostgreSQL, Oracle
Discover over 15,000 top freelancers
Statistics of experts using MediatR
Aggregated from the professional profiles of matched freelancers.
Experience
20 years
Position duration
1.1 years
Positions per freelancer
19
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Manufacturing, Banking and Finance
Certification focus areas
Information Technology, Business Intelligence, Human Resources
Bachelor's degree or higher
67%
Master's degree or higher
50%
Certifications per freelancer
2
Most common languages
German, English, Spanish
Speak two or more languages
100%
Based on our profile pool as of 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Germany 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 Germany using MediatR
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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
MediatR 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%)
- Manufacturing (75%)
- Banking and Finance (63%)
- Healthcare (63%)
- Transportation (63%)
- Automotive (50%)
- Education (50%)
- Media and Entertainment (50%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What MediatR does
MediatR is a .NET library that implements the mediator pattern for in-process communication. It routes requests such as commands, queries and notifications to dedicated handlers, reducing direct dependencies between application components. Teams commonly use it to keep business workflows modular and easier to test.
Core application patterns
MediatR fits naturally into layered and clean architecture projects built with C# and ASP.NET Core. Specialists use it to separate write operations from read operations, coordinate domain events and apply cross-cutting behavior without placing too much logic in controllers or endpoints.
- Define request, response and notification contracts
- Implement command and query handlers
- Add pipeline behaviors for validation, logging and transactions
- Publish in-process notifications between application components
Ecosystem and tooling
MediatR projects usually involve the .NET runtime, C#, ASP.NET Core and dependency injection. Strong professionals also work with Entity Framework Core, FluentValidation, logging abstractions, unit testing tools and serialization formats used by HTTP APIs. They understand how registration and service lifetimes affect request handling.
When companies need specialists
Companies bring in freelance expertise when an existing codebase has tightly coupled controllers, unclear application boundaries or growing command and query logic. A specialist can introduce MediatR incrementally, review an existing setup or establish conventions for a new service without forcing an unnecessary rewrite.
- Refactor controller-heavy ASP.NET Core applications
- Establish CQRS conventions across application features
- Diagnose pipeline, registration or handler resolution issues
- Improve test coverage around application behavior
What good delivery includes
A reliable implementation keeps handlers focused, dependencies explicit and request contracts meaningful. Experienced professionals distinguish useful mediation from needless indirection, document pipeline behavior and protect domain rules from being scattered across handlers. They also consider performance, cancellation, error handling and transaction boundaries.
Working with experts in Germany
MediatR work often supports backend services, internal business systems and API products used across German industries. Remote collaboration can work well when repositories, architecture decisions and acceptance criteria are clear; on-site sessions may help during a complex migration or architecture review. German or English communication should match the project team and stakeholders.
Frequently asked questions
What clients ask us most about MediatR — answered in short.
MediatR handles in-process requests and notifications through a mediator abstraction. Teams use it for commands, queries, domain events and pipeline behaviors such as validation, logging or authorization. It is especially useful when application workflows need clearer boundaries.
MediatR reduces direct references between the caller and the handler, which can make application features easier to organize and test. Direct service calls may be simpler for small workflows, while MediatR is more helpful when request types, pipelines and CQRS conventions provide real structure.
A strong MediatR specialist usually understands C#, ASP.NET Core, dependency injection and clean architecture. Experience with Entity Framework Core, CQRS, FluentValidation, automated testing and domain events is also valuable, depending on the project.
The required depth depends on the application’s size and architecture. A small API may need someone comfortable with request handlers and registration, while a larger system benefits from a professional who can design pipeline behavior, transaction boundaries, testing strategies and migration steps.
MediatR is well suited to remote collaboration because its work is expressed through code, contracts and architecture decisions. Teams in Germany should agree on repository access, review practices, documentation and whether communication will be in German or English before work begins.
A MediatR layer may add unnecessary indirection to a small application with only a few straightforward operations. A careful specialist first examines coupling, testing needs and feature growth rather than treating the library as a mandatory architectural choice.
Review whether handlers have focused responsibilities, dependencies are explicit and pipeline behaviors are applied consistently. Good MediatR work also includes meaningful request contracts, tests for application behavior, clear error handling and no hidden business rules buried in infrastructure concerns.
A MediatR professional should clarify the .NET version, application architecture, dependency injection setup and whether the team follows CQRS. They should also ask about existing handlers, domain events, testing standards, deployment constraints and the scope of any planned refactoring.
The average hourly rate of freelancers in Germany who have used MediatR in their recent projects is 84 €, which corresponds to a daily rate of about 671 € based on an 8-hour working day.
Of the freelancers in Germany who have used MediatR in their recent projects, 67% hold at least a Bachelor's degree and 50% hold at least a Master's degree.
On average, freelancers in Germany who have used MediatR in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 1.1 years.
The most common languages among freelancers in Germany who have used MediatR in their recent projects are German (88%), English (88%), and Spanish (25%).
The most common industries among freelancers in Germany who have used MediatR in their recent projects are Information Technology (100%), Manufacturing (75%), and Banking and Finance (63%).
The most common business areas among freelancers in Germany who have used MediatR in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (75%).
Main locations of FRATCH Experts, who have recently used MediatR
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 Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
