MediatR Experts in Germany
in minutes from over 15,000 CVs with the power of AI.Hire experts who use MediatR to keep application logic clean, add request and notification handling, and shape CQRS flows without heavy coupling. They also work with pipeline behaviors, validation, and integration patterns. Get fast, precise matching with vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used MediatR
Oliver Fries
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
Giuseppe Abrignani
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
Jorge Nuricumbo
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
- Architected and implemented 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.
- Designed and developed 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 the production error rate.
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
Hicham Mokhtari
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 Hock
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 Kintscher
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 Seelemeyer
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 Volkmann
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 30 Aug 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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
What MediatR does
MediatR is a small .NET library for sending requests, commands, queries, and notifications through a mediator instead of calling handlers directly. It helps teams keep business logic in focused handlers and reduce tight links between components. Searchers may also look for the full name, MediatR, or the CQRS mediator pattern.
Typical use cases
- Command and query handling in ASP.NET Core services
- Domain events and notifications between application parts
- Pipeline behaviors for logging, validation, and tracing
- Clean application layers in modular backends
It fits well in systems where requests need a clear flow and side effects should stay easy to test. Teams often use it for APIs, internal services, and event-driven workflows.
Ecosystem and skills
Strong specialists know the .NET stack around it, especially ASP.NET Core, dependency injection, and testing with unit and integration tests. They should understand handler design, request/response models, and how to keep cross-cutting concerns out of the core logic.
Good experts also know when not to overuse MediatR. They apply it where it adds structure, not as an extra layer on every call.
When companies bring in help
Companies often look for freelance expertise when an existing code base has grown hard to change or when a new .NET service needs a clean architecture from the start. In Germany, that often means work with mixed in-house teams, remote specialists, and English-first documentation.
- Refactoring a layered backend into clearer handlers
- Adding validation, authorization, or logging behaviors
- Reviewing CQRS usage and request boundaries
- Supporting delivery during a migration or new build
What strong specialists deliver
A good MediatR professional writes handlers that are small, readable, and easy to test. They keep side effects under control, choose good message boundaries, and avoid turning the mediator into a hidden service locator.
They also document conventions so the team can keep using the pattern consistently after handover.
Common pitfalls
MediatR is useful, but it can be misused. If everything becomes a request and every small action gets its own handler, the code base can become harder to follow instead of simpler.
Experienced experts watch for over-abstracted flows, unclear naming, and duplicate logic across handlers. They keep the design practical and tied to the real business process.
Frequently asked questions
What clients ask us most about MediatR — answered in short.
MediatR is used to route commands, queries, and notifications through handlers instead of direct class-to-class calls. That makes application code easier to organize, especially in ASP.NET Core systems with clear request flows. It is often chosen for CQRS-style services, domain events, and cleaner separation between layers.
A strong MediatR setup helps when a service has many use cases, shared rules, or cross-cutting steps like validation and logging. Direct service calls can be fine for very small features, but MediatR is useful when you want a clearer boundary around each request. The main question is whether the added structure reduces complexity in your code base.
MediatR is often used to implement CQRS patterns inside a .NET application, but it is not the same thing as a full event bus. CQRS is an architectural approach, while MediatR is a library that helps with request dispatch and notifications. Compared with an event bus, it stays simpler and usually fits in-process communication.
A good MediatR specialist should be comfortable with ASP.NET Core, dependency injection, and unit testing. Knowledge of Clean Architecture, CQRS, validation, and logging is also important because MediatR often sits in the middle of those patterns. For larger systems, experience with async flows and domain-driven design helps a lot.
A simple MediatR integration can be handled by someone who knows modern .NET and has used the mediator pattern before. A larger migration or a messy legacy backend needs a specialist who can design request boundaries, refactor safely, and keep behavior consistent. The more business rules and side effects you have, the more important deep experience becomes.
Yes, MediatR work is often well suited to remote collaboration because the patterns are easy to review in pull requests and design notes. In Germany, many teams mix on-site workshops with remote implementation, especially when English is the working language. Clear naming and short feedback loops matter more than location.
Look for a MediatR expert who can explain why the pattern is being used, not just how to wire it up. Good signs are small handlers, clean tests, clear pipeline behavior use, and the ability to avoid unnecessary abstraction. Ask for examples of refactoring decisions and how they kept the code base maintainable.
Yes, MediatR is still relevant when a team wants cleaner request handling inside a .NET application. It works well with current ASP.NET Core code bases, especially where CQRS, notifications, and modular design are important. The key is using it for structure, not adding it everywhere by default.
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
