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World Congress 2026 Europe - Virtual Stage • Jul 2, 2026 • Session details

Microservice-Ready Without Microservices: Introducing Hexagonal Architecture in a Monolith

Matthias Kauzmann

Get the maintainability of microservices without the heavy tax of distributed deployment. Discover how hexagonal architecture enforces pristine, extractable boundaries directly inside your legacy monolith.

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#1 about 2 min

Delivering pharmaceutical compliance via the Swap monolith

An overview of the deep pharmaceutical knowledge powering product swapping and dosage validation.

#2 about 5 min

Evaluating hexagonal architecture for monolith management

Why standard diagrams fail to convey the practical value of hexagonal patterns in complex codebases.

#3 about 4 min

Modeling new bounded contexts without spinning up microservices

Hosting a new pricing subdomain within an existing monolith to defer immediate microservice scaling decisions.

#4 about 9 min

Structuring outer and inner layers in hexagonal design

How strict dependency constraints cascade from external adapters down to the inner domain core.

#5 about 5 min

Shielding business rules from volatile infrastructure shifts

Isolating integrations like message brokers and databases empowers subdomains to act as deployable independent components.

#6 about 8 min

Validating architectural boundaries using ArchUnit testing

Implementing automated testing rules to detect and manage structural violations during the CI/CD pipeline.

#7 about 5 min

Enforcing strict boundaries with Java platform module system

Utilizing module-info files and parent POM structures to enforce compile-time dependency isolation.

#8 about 2 min

Reviewing the long-term impact of hexagonal restructuring

Concluding outcomes reflecting enhanced domain clarity and structural strength after eight months of production use.

Matching moments

8:14 min

Restructuring the monolith using domain-driven design

Jens Happe Jens Happe · LIVE

2:34 min

The challenge of preventing modular monoliths from degrading

Christoph Kober Christoph Kober · WWC Europe 2026

2:14 min

Evaluating data storage limitations and monolithic architectural challenges

George Asafev · WWC 2023

5:02 min

Implementing hexagonal architecture patterns for business logic isolation

Simon Lasselsberger · WWC 2021

3:18 min

Transitioning from a monolith to a microservice architecture

Aleksandr Kalikov · LIVE

1:29 min

Applying pure core architectural patterns to web applications

Michael Koppmann · LIVE

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