CQRS Experts in Germany
matched in minutes by AIHire experts who design command and query models, integrate event-driven workflows and connect CQRS with Event Sourcing, messaging or Domain-Driven Design. FRATCH matches you quickly with vetted, available freelancers who fit your technical and delivery needs.
Meet FRATCH Experts in Germany, who have recently used CQRS
Ali A.
Last position:
Founder & Architect at Independent AI R&D
- Fully on-premises LLM document-examination platform for a compliance-critical banking domain: agentic LangGraph pipeline with deterministic verification, every AI judgment structured and source-anchored; ~960 automated tests, zero data egress
- GPU throughput engineering (quantized serving, speculative decoding, prefix caching): 9.5x extraction speed-up, 500+ multi-document case files per day on a single A100
- AI-native EDI/EDIFACT integration platform (~116k LOC Java 25 / Spring Boot 4, 1,900+ tests): LLM-drafted partner mappings machine-verified before go-live (DFDL conformance, field-coverage checks, dry runs), ~99.5% byte match on real customer files — replacing weeks of manual mapping per partner
Karen M.
Last position:
Personal AI Engineering Project — Croky AI at Crocky AI
Product:
- Built a production-ready AI platform for generating brand-aware marketing images and videos from product data, user requirements, and uploaded media.
- Own the platform architecture, technical roadmap, API design, security, deployment workflow, operational reliability, and model-provider strategy.
- Developed the core platform in .NET and built supporting AI and workflow prototypes in Python, applying language-independent API contracts and structured interfaces between services and model providers.
- Implemented reliable background processing with RabbitMQ, persisted workflow state, idempotent handling, retries, failure recovery, logging, secure storage, authorization, and credit accounting.
- Made pragmatic build-versus-buy and model-routing decisions based on reliability, latency, cost, and maintainability rather than novelty.
Agent Orchestration & RAG Systems
- Built and compared agent workflows using Microsoft Agent Framework, LangGraph, and LangChain, including tool use, conditional routing, clarification steps, state management, and hand-offs between agents.
- Implemented reusable .NET components for agents, prompts, tools, model providers, structured responses, and retrieval with pyvector, making it easier to change AI providers without rewriting the core workflow.
Yusuf C.
Last position:
Senior Software Engineer at LeiKon GmbH
- Development of scalable backend applications with C#/.NET and Java
- Design and implementation of distributed microservice architectures
- Development and integration of REST APIs for industrial applications
- Development of modern web applications with React, Angular, and TypeScript
- Implementation of MQTT-based communication solutions
- Integration of industrial protocols such as OPC UA and Modbus TCP
- Development of batch, process control, and HMI components
- Containerization and deployment of applications with Docker
- Conducting code reviews and supporting architecture decisions
- Close collaboration with product owners, QA, and interdisciplinary teams
- Analysis of business requirements and implementation of technical solutions
- Further development of existing software architectures with a focus on maintainability and performance
Technologies: C#, .NET, ASP.NET Core, Java, C++, React, Angular, TypeScript, Vue.JS, MQTT, OPC UA, Modbus TCP, Docker, GitLab, MariaDB, MySQL, Linux
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
Johannes W.
Last position:
Senior Software Engineer at EnBW
The Agent Support Interface is an internally used software that is used by all 1st- and 2nd-level customer advisors and shows information about the customer and their cases in a central and compact form.
The system provides links to other platforms and systems to improve the agent's workflow.
In an agile SCRUM team, all challenges were implemented independently and as a team.
Consulting in the areas of software architecture, DevOps strategies, and agile development processes.
Supporting the team in decision-making and introducing best practices for test automation and code reviews.
Technologies: Microsoft .NET, Microsoft Azure, C#, MVC, CQRS, Akka.Net, Angular 18, NGXS, Typescript, Cypress/Playwright, Wiremock, CI/CD, DevOps.
Waldemar B.
Last position:
Software-Architekt Produktdaten-Management Tool at Ferchau Contract GmbH
- Definition of the software architecture
- Design and development of modules
- Supporting internal employees in the learning and onboarding process
- Tools: SAP CAP / CDS, Java 21, SAP Hana, SAP Business Technology Platform (BTP)
Rizwan B.
Last position:
Software Developer/Database/Devops at Sutor Bank
Project:
- Migration of existing VB6 applications to C# (Web API, web app)
- Report development and risk management systems (C#, API interfaces, databases)
- Document archive (API interfaces, databases)
Team size: 9 people
- Reports for Risk and Credit Management Development and maintenance of report structures to support risk and credit decisions, including data modeling, validation, and automated delivery for business departments.
- Migration and maintenance of a legacy system to the latest version of .NET for the asset management system Planning and execution of the modernization of an existing asset management system, including code refactoring, performance optimization, test automation, and sustainable maintenance after migration.
- Replacement of the COM-based archive connection with a REST API Redevelopment of the connection of the document archive (HYPARCHIV) to a REST API based on OpenAPI/Swagger, including archiving with index and stamp fields as well as PDF export into the customer portal.
- Redesign of payment receipt processing Replacement of an existing Oracle PL/SQL process with a new implementation in C# based on a business concept, including business alignment, data modeling, and test coverage.
- Design and implementation of tests, creation of deployment pipelines, and documentation
- Further development and implementation of change requests.
- Regular code reviews within the team as well as optimization of application scalability and stability
Technologies: C#, .NET 10, ASP.NET, Unit of Work, IoC, Three-Tier Architecture, Entity Framework Core, DB First, Web API, Swagger, OpenAPI, Python, Oracle, HYPARCHIV, Azure, PowerBI, DevOps, AKS (Azure Kubernetes Service), GIT, xUnit, NSubstitute, TypeScript, Vue.js, Pinia,
Methods: agile development using Scrum
Klajdo F.
Last position:
Independent Product Developer / Software Architect at rastr.eu
- Architected and deployed a live B2B geocoding and demographic-data platform for Germany, combining address lookup with census-based population statistics through a web application and REST API.
Reginald L.
Last position:
ERP System Redesign (web-based)
PHP and React redesign of a web-based ERP system.
- Development of the header and parts of the navigation
- Development of various modules in React, e.g. calendar, chat, and various tables
Tobias N.
Last position:
Enterprise & Solutions Architect
- Building an independent enterprise IT setup — cloud strategy, network, AWS landing zone, security requirements, contract negotiations.
- Migration of all applications; avoiding high contractual penalties for the client.
- Onboarding and coordination o...
Wadim L.
Last position:
Software Engineer & Consultant at Abat+ GmbH | Daimler Trucks AG
New development of the vehicle planning and delivery system (FAPS)
As part of the modernization of a central backend application, the existing monolithic COBOL-based system was replaced by a service-oriented architecture with Spring Boot. The goal of the project is to make the digital mapping of vehicle planning and delivery future-proof and scalable.
Work on the technical architecture and interface design
Development of a service based on Spring Boot for migrating existing data into a new data model
Development of REST APIs and the related service layer
Development of middleware for integrating the new backend into an existing client
Creation of unit and end-to-end tests
Adaptation of build pipelines
Developer training for customer staff (Java, Azure DevOps, general support)
Support for testers and other project members
Upgrade of the Spring Boot version (& Hibernate)
Creation of documentation
Java 8 and 17, Spring Boot, Spring JPA, Hibernate, Optimistic Locking (entity versioning), JUnit, Cucumber, PostgreSQL, Azure Cloud, Microservices, Azure Storage, Azure DevOps, Azure Kubernetes Service, RESTful web services, JSON, Scrum, Confluence, ArchUnit
Robin S.
Last position:
Senior Cloud & Backend Engineer at Media-Saturn-Holding GmbH
- Implementing applications with Kotlin and Ktor as microservices
- Using MongoDB in the MongoDB Atlas cloud
- Asynchronous communication of services via Google Pub/Sub
- Using Kotest and MockK for unit tests
- Developing an administration frontend with TypeScript, React and Express.js
- Provisioning environments in GCP using Terraform
- Implementing CI/CD processes with GitHub Actions
- Operating scalable production and test environments in GCP with Kubernetes, Helm and Flux CD
- Monitoring environments with Prometheus and Grafana
- Providing BI data in the Google BigQuery data warehouse
Stefan J.
Last position:
PHP / Symfony Fullstack Developer via temporary staffing at N.V.L. Group
- PHP legacy and Symfony 5+ development of N.V.L. Group's own ERP from PHP 7.4 onward including Oracle SQL, RabbitMQ, React and ExtJS
- Use of Docker and GitLab to manage containers and source code
- Implementation of unit, integration and functional tests
- Frontend development with React and ExtJS in Docker containers via GitLab
Manuel R.
Last position:
Cloud Architect & Lead Developer
- Responsible for the 5-head development team and Scrum + DevOps approach
- Designed and implemented the cloud architecture for the application landscape
- Lead development for the user management on Azure Cloud using .NET 8/C#
- Development for the user management frontend using React (TypeScript)
- Technologies: Azure AD, Functions, Storage, CosmosDB, Service Bus, AKS, Monitor, Pipelines, Key Vault, MSSQL, Bicep, App Service, Log Analytics, Application Insights, Cost Management
- Backend: .NET/C#; Frontend: Angular (TypeScript)
- Unit testing: NUnit, xUnit, Moq
- CI & CD: Azure DevOps, GitHub Actions, GitLab CI
- DevOps & IaC: Bicep, Terraform, Docker, Kubernetes
- Security & Compliance: ISO 27001, DevSecOps
- Software development approach: Scrum, SAFe, Kanban
Discover over 15,000 top freelancers
Statistics of experts using CQRS
Aggregated from the professional profiles of matched freelancers.
Experience
16 years
Position duration
1.9 years
Positions per freelancer
11
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Transportation, Banking and Finance
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
92%
Master's degree or higher
63%
Certifications per freelancer
2
Most common languages
English, German, 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 CQRS
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.
CQRS 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 (94%)
- Transportation (47%)
- Banking and Finance (44%)
- Automotive (42%)
- Manufacturing (39%)
- Education (33%)
- Government and Administration (31%)
- Retail (31%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What CQRS does
CQRS, short for Command Query Responsibility Segregation, separates operations that change state from operations that read state. Commands handle business decisions and validation, while queries return data shaped for a specific user or process. This separation helps teams model complex domains without forcing one data model to serve every purpose.
Where it fits
CQRS is used in order management, payments, inventory, logistics, customer platforms and other systems with demanding business rules. It can support modular monoliths, microservices and event-driven applications. The pattern is especially useful when read traffic, write logic and consistency needs differ sharply.
- Separate transactional workflows from reporting views
- Create read models for dashboards and search
- Isolate complex business commands
- Scale query and command paths independently
Ecosystem and tooling
CQRS often works alongside Domain-Driven Design, Event Sourcing and integration messaging, but none of these is mandatory. Professionals may use Kafka, RabbitMQ or cloud messaging for event distribution, with relational databases, document stores or dedicated search indexes for read models. Framework choices depend on the domain, consistency rules and operational environment.
When to bring in expertise
Companies usually seek freelance CQRS expertise when a domain has outgrown a simple CRUD model, when reporting slows transactional work or when services need clearer ownership. Specialists can assess whether the pattern is justified, define boundaries and plan a safe transition from an existing architecture. In Germany, remote delivery can work well when workshops, documentation and communication routines are explicit; some regulated or collaborative teams may still prefer on-site sessions.
- Review an architecture for unnecessary CQRS complexity
- Define commands, queries, events and ownership
- Design migration steps from a shared data model
- Establish consistency and failure-handling rules
Skills that matter
Strong professionals understand domain modeling, distributed systems, APIs, databases and messaging rather than treating CQRS as a framework feature. They can explain eventual consistency, idempotency, retries, ordering, versioning and projection rebuilding in practical terms. They also connect technical choices to user workflows, operational support and compliance requirements.
What quality looks like
Good CQRS work starts with a clear reason for separating reads and writes. A capable specialist keeps command models focused, makes read projections observable and documents how data becomes consistent. They test duplicate messages, partial failures and replay scenarios, then leave maintainable code, useful runbooks and a design the internal team can operate confidently.
Frequently asked questions
What clients ask us most about CQRS — answered in short.
CQRS is used to separate business actions from data retrieval. It suits domains such as orders, payments, inventory and case management where commands need strict rules while queries need fast, purpose-built views.
CQRS separates command and query responsibilities, while CRUD commonly uses one model for creating, reading, updating and deleting data. CQRS can clarify complex domains and scale read workloads, but CRUD is often simpler for straightforward applications.
CQRS and Event Sourcing are related but distinct patterns. CQRS separates reads from writes; Event Sourcing stores state changes as events, and a system can use either pattern without requiring the other.
CQRS work benefits from knowledge of Domain-Driven Design, distributed systems, messaging and database design. Experience with Kafka, RabbitMQ, API design, observability and eventual consistency is also valuable when the architecture spans services.
A CQRS project needs a specialist who has handled the specific risks involved, not simply someone familiar with the acronym. The right level depends on domain complexity, service boundaries, data volume and whether the work includes migration, event replay or production operations.
CQRS can be designed and delivered remotely when the team shares clear domain language, decision records and interface contracts. German and English are both common in international delivery, but language expectations should be agreed before workshops and stakeholder sessions.
A strong CQRS professional can explain why separation is needed and where it should stop. Review how they handle consistency, duplicate messages, failed projections, retries, observability and the operational burden created by additional models.
CQRS may be a poor fit for a small application with simple business rules and limited differences between reads and writes. Its extra models, synchronization concerns and operational tooling can add unnecessary complexity when a conventional design already meets the requirements.
The average hourly rate of freelancers in Germany who have used CQRS in their recent projects is 94 €, which corresponds to a daily rate of about 753 € based on an 8-hour working day.
Of the freelancers in Germany who have used CQRS in their recent projects, 92% hold at least a Bachelor's degree and 63% hold at least a Master's degree.
On average, freelancers in Germany who have used CQRS in their recent projects have 16 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Germany who have used CQRS in their recent projects are English (100%), German (97%), and Spanish (14%).
The most common industries among freelancers in Germany who have used CQRS in their recent projects are Information Technology (94%), Transportation (47%), and Banking and Finance (44%).
The most common business areas among freelancers in Germany who have used CQRS in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (58%).
Main locations of FRATCH Experts, who have recently used CQRS
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 
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FRATCH CEO
