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CQRS Experts in Berlin

in minutes with the power of AI and vetted, available specialists.

Hire experts who split command and query flows cleanly, design event-driven services, and shape read models, projections, and message handling for demanding systems. They also support event sourcing setups, integration work, and performance tuning, with fast, precise matching to vetted, available freelancers.

Meet FRATCH Experts in Berlin, who have recently used CQRS

Verified expert

Fady K.

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Senior Software Developer / Tech Lead

Berlin
Fady K.

Last position:

Senior Software Developer / Tech Lead at Specific Objects Technologies GmbH

  • Project 1: Multi-Tenant SaaS Platform: Data Integration & Pricing Management
  • Objective: New development of ELT pipeline (replacement for Java 6 legacy), integration of heterogeneous source systems (CSV, Excel, Email, external DBs), event-sourcing for complete auditability, multi-tenant architecture for tenant-capable data processing
  • Challenge: Processing millions of records daily, audit compliance, data isolation between different tenants
  • Solution: Stakeholder workshops for requirements analysis, event-driven architecture with Axon Framework and Apache Kafka, AWS services (EC2, S3, Lambda, SQS, API Gateway) for cloud integration, PostgreSQL with tenant-specific schemas for multi-tenant data isolation, REST API design with Spring Boot for external system integrations, comprehensive testing strategy (JUnit, Spring Test, Postman, PACT, ArchUnit)
  • Results: ELT performance improved from 30+ min to 1-5 min; 2-3 hours daily saved through workflow automation; 10-20 hours/week saved through event-sourcing auditability; 100% audit compliance; secure multi-tenant data isolation for 10+ tenants
  • Project 2: Multi-tenant CRM System Modernization
  • Objective: Migration of CRM system (20+ years PHP/MySQL) to Java microservices, Domain-Driven Design implementation, establishment of Test-Driven Development, multi-tenant-capable SaaS architecture for multiple customer tenants
  • Challenge: Remodeling complex business logic, no existing test culture, scalable tenant management with data isolation
  • Solution: Comprehensive testing strategy (JUnit, Spring Test, Postman, PACT, ArchUnit), multi-tenant architecture with tenant-specific databases, REST API design with Spring Boot for cross-tenant integration, Kubernetes and Docker for container orchestration
  • Results: 2× performance improvement; deployment time reduced from 40+ min to 5-7 min; migration without production outages; scalable multi-tenant solution for 15+ customer tenants
  • Technologies: Java, Spring Boot 3.x, Angular, Apache Kafka, AWS (EC2, S3, Lambda, SQS, API Gateway), PostgreSQL, Axon Framework, Kubernetes, Docker, GitLab CI, REST API
Verified expert

Khaled M.

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Senior/Staff Backend Engineer

Berlin
Khaled M.

Last position:

Senior/Staff Backend Engineer at Heycar (Mobility Trader GmbH)

  • Heycar is a leading automotive platform redefining the used car market through intelligent data pipelines, multi-tenant services, and dealer-focused tooling. I led initiatives across backend architecture, data ingestion, and identity management to enhance scalability, reliability, and developer productivity.
  • Ingestion Platform: Designed a unified ingestion platform with YAML-based configuration, enabling new dealer data pipelines to be onboarded without code changes, cutting setup time from ~2 months to 2-3 days and improving scalability by 40%.
  • Keycloak Leadership: Acted as the company's Keycloak expert, scaling it for multi-tenant identity management and extending functionality with custom plugins and delegated admin APIs.
  • Back-Office Tooling: Developed a back-office application integrated with Salesforce, enabling dealers to manage inventory, convert leads, and handle support requests in real time.
  • Multi-Tenant Migration: Collaborated across backend teams to migrate Heycar's core services into a unified multi-tenant cluster, ensuring high availability.
  • Frontend CI Optimization: Optimized monorepo delivery by implementing CircleCI dynamic config with NX, deploying only affected UI projects and drastically cutting build times.
  • Observability & Mentorship: Enhanced monitoring and release reliability while mentoring backend engineers and improving code review standards.
Verified expert

Jan H.

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Technical Co-Founder

Berlin
Jan H.

Last position:

Technical Co-Founder at Telemarie UG

  • Technical Leadership & SW Architecture: Conducting trade-off analyses for technology stacks and leading the design and implementation of the software architecture, including mobile and backend solutions. Facilitating Event Storming workshops for DDD and software architecture.
  • Strategic Direction & Organizational Development: Playing a key role in defining the strategic direction of the product and organization, exploring new models such as steward ownership.
  • Lean Startup & Agile Development: Introducing Lean and Agile principles, implementing lean prototypes, and ensuring adherence to Lean Startup processes, iterative development from product/solution fit to product/market fit.
  • Team Building & Collaboration: Facilitating workshops, retrospectives and future workshops to collaboratively develop tactics and strategies.
  • Technologies: Flutter, JS/TS, React, Google Cloud, Firebase, Android, iOS.
  • Organizational Methods: Lean startup, lean canvas, lean agile, event storming, retrospectives.
Verified expert

Muhammad A.

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Senior Software Engineer

Berlin
Muhammad A.

Last position:

Senior Software Engineer at Verbund Pflegehilfe

  • Own Azure-hosted ASP.NET Core microservices for chronic-care workflows, sustaining 99.8% uptime across 3,000+ patient interactions.

  • Shape HL7 FHIR-based patient, encounter, and observation profiles delivering a unified source of truth for clinical teams and integrations.

  • Implement SignalR telemetry, Application Insights alerting, and automated pipelines that surface deteriorating vitals in under three seconds.

  • Automated consultant outreach by orchestrating Twilio voice campaigns via n8n workflows and VAPI AI assistants, boosting successful client contacts by 55%.

  • Entlass Manager: Led the end-to-end build of the chronic-care coordination platform, standing up Azure-native microservices, clinical data flows, and patient-facing tooling from initial requirements through production release.

  • Power Dialer: Built the Twilio-driven consultancy auto-dialer and n8n workflows, raising client reachability to 85%.

Discover over 15,000 top freelancers

Statistics of experts using CQRS

Aggregated from the professional profiles of matched freelancers.

Experience

18 years

CQRS experts in Berlin have 18 years of professional experience on average.

Position duration

3.3 years

CQRS experts in Berlin stay in a single position for 3.3 years on average.

Positions per freelancer

6

CQRS experts in Berlin have completed 6 positions on average over the course of their careers.

Top business areas

Information Technology, Product Development, Research and Development

CQRS experts in Berlin have gathered most of their hands-on project experience in Information Technology, Product Development, and Research and Development.

Top industries

Information Technology, Education, Transportation

CQRS experts in Berlin are most in demand in Information Technology, Education, and Transportation.

Bachelor's degree or higher

100%

100% of CQRS experts in Berlin hold at least a Bachelor's degree.

Master's degree or higher

60%

60% of CQRS experts in Berlin hold at least a Master's degree.

Certifications per freelancer

1

CQRS experts in Berlin hold 1 professional certification on average.

Most common languages

German, English, Spanish

CQRS experts in Berlin most often speak German, English, and Spanish.

Speak two or more languages

100%

100% of CQRS experts in Berlin speak two or more languages.

Based on our profile pool as of 19 Sep 2026.

Daily rate distribution

0 2 4 6 8
One of the CQRS experts in Berlin charges less than €480 per day.
One of the CQRS experts in Berlin charges between €640 and €720 per day.
4 of the CQRS experts in Berlin charge €720 or more per day.
<€480 €640-​720 €720+

The chart shows how the daily rates of freelancers in this technology in Berlin 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 Berlin using CQRS

Rates are based on recent contracts and do not include FRATCH margin.

800
600
400
200
Rate comparison chart
Daily rate avg. 718 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

800
600
400
200
Rate comparison chart
Median rate 736 €

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 (100%)
  • Education (67%)
  • Transportation (67%)
  • Healthcare (33%)
  • Telecommunication (33%)
  • Automotive (17%)
  • Biotechnology (17%)
  • Energy (17%)

Please note that freelancers can work across multiple industries, so percentages overlap.

About the technology

CQRS in practice

CQRS, short for Command Query Responsibility Segregation, separates write actions from read access. That split helps teams model business rules clearly and keep reporting, search, or dashboards independent from transactional updates. It is common in systems where reads and writes need very different shapes.

Where it fits

CQRS is often used in:

  • Order and booking flows with complex validation
  • Event-driven services and workflow orchestration
  • APIs with heavy reporting or search needs
  • Systems that pair CQRS with event sourcing

It fits especially well when one model cannot serve both fast updates and flexible reads without compromise.

Tools and patterns

Strong CQRS work depends on more than a pattern name. Professionals must handle commands, queries, handlers, projections, message buses, and storage that suits each side of the system. They often work with frameworks and stacks that support asynchronous processing, events, and clear domain boundaries.

When to bring in help

Companies usually bring in freelance expertise when a system starts to blur its boundaries or slow down under mixed workloads. That often happens during a redesign, a new service rollout, or when reporting features keep breaking the transactional model. In Berlin, this is common in product teams that need clean remote collaboration and clear technical writing in English.

What strong specialists do

Good CQRS professionals do not just split code. They decide where separation adds value, keep the command side strict, and make read models practical for real users. They also watch for extra complexity, because CQRS is useful only when the business case justifies it.

What to expect

A solid engagement usually includes domain analysis, model design, handler implementation, and guidance on projections, consistency, and testing. The best specialists explain trade-offs clearly, document the flow of data, and leave the system easier to change. For Berlin teams, they can work on-site or remotely, as long as the boundaries and ownership stay clear.

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Frequently asked questions

Curious about CQRS? Here are the answers that come up again and again.

CQRS is used to separate write logic from read logic when the two have very different needs. Teams choose it for systems like order processing, booking, workflow engines, search-heavy apps, and event-driven services. It helps keep commands strict while letting queries serve users in a simpler shape.

CQRS and event sourcing are often used together, but they are not the same thing. CQRS separates command and query models, while event sourcing stores state as a stream of events. A project can use CQRS without event sourcing, but many complex systems pair them when auditability and replay matter.

CQRS can be too much if the app has simple data rules and basic read and write needs. It adds extra moving parts such as handlers, projections, and consistency handling. If a single model already works cleanly, a simpler design is often better.

A strong CQRS specialist usually knows domain-driven design, messaging, event handling, and data modeling. Experience with projections, asynchronous processing, testing of eventual consistency, and integration between services is also valuable. In many cases, the best fit also understands event sourcing and distributed system trade-offs.

CQRS makes sense when read and write paths are clearly different, or when one side needs to scale and evolve independently. It is also useful when domain rules are complex and changes keep colliding with reporting needs. For small CRUD-style systems, it may not be worth the added structure.

Yes, CQRS work often fits remote collaboration well because the pattern benefits from clear diagrams, written decisions, and precise interface contracts. Berlin teams frequently mix on-site workshops with remote implementation and review. English is usually enough for technical delivery, especially in international product teams.

A good CQRS expert can explain where the split helps and where it does not. They should talk clearly about command boundaries, read models, consistency, and failure handling, not just repeat the pattern name. Look for delivered systems, trade-off thinking, and clean communication around data flow.

No, Command Query Responsibility Segregation is a design approach, not a transport tool. A command bus or message queue may be part of the implementation, but CQRS is about how responsibilities are separated in the system. Strong specialists know when messaging helps and when it would only add noise.

The average hourly rate of freelancers in Berlin, Germany who have used CQRS in their recent projects is 90 €, which corresponds to a daily rate of about 718 € based on an 8-hour working day.

Of the freelancers in Berlin, Germany who have used CQRS in their recent projects, 100% hold at least a Bachelor's degree and 60% hold at least a Master's degree.

On average, freelancers in Berlin, Germany who have used CQRS in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 3.3 years.

The most common languages among freelancers in Berlin, Germany who have used CQRS in their recent projects are German (100%), English (100%), and Spanish (33%).

The most common industries among freelancers in Berlin, Germany who have used CQRS in their recent projects are Information Technology (100%), Education (67%), and Transportation (67%).

The most common business areas among freelancers in Berlin, Germany who have used CQRS in their recent projects are Information Technology (100%), Product Development (100%), and Research and Development (67%).

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.

Countries:

Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg

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Philipp Thomaschewski

FRATCH CEO

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