Applications with clean architectures
We build applications that age well: hexagonal architecture, Domain-Driven Design and code that can be tested, understood and evolved without pain, year after year.
Why hexagonal architecture and DDD
Most of the cost of software lies in its maintenance. A hexagonal architecture isolates business logic from frameworks, databases and external APIs, so switching Symfony for another framework or MySQL for PostgreSQL never means rewriting the application. Combined with Domain-Driven Design, your domain is modelled in a language that both business and developers understand equally well. In practice, your application focuses on what makes your business unique, and everything else — frameworks, databases, external services — becomes a replaceable detail.
Quality proven by tests
Our applications are born with automated unit and integration tests, CI/CD pipelines that validate every change and living documentation. The result: frequent, safe deployments, teams unafraid of touching the code and a technical foundation that supports years of product evolution without uncontrolled technical debt. On top of that, the architecture is explained by the project structure itself: a new developer understands where each decision lives in days, not months.
What a clean architecture brings
- Hexagonal architecture and DDD as the foundation
- Well-modelled domains in a ubiquitous language
- Automated tests and CI/CD pipelines
- Decoupled, versioned APIs and microservices
- Full independence from frameworks and infrastructure
- Living documentation that travels with the code
Hexagonal architecture and DDD: our speciality
The HexagonalGuru name is no coincidence: we have spent over a decade applying hexagonal architecture, Domain-Driven Design and patterns such as CQRS and event sourcing on real projects in logistics, healthcare, finance and industry. If you are looking for developers specialised in clean architectures with PHP and Symfony, or training for your team to master these techniques, we are the technical partner you need.
How we build your application
A way of working that prioritises quality from the very first line of code.
Domain discovery
Before writing code, we understand your business: interviews with domain experts, definition of the ubiquitous language and a map of bounded contexts. This is the foundation of a domain model that reflects how you really work.
Architecture design
We design the ports-and-adapters structure, choose the right patterns (CQRS, event sourcing, microservices) and document key decisions with ADRs so the team always knows why each choice was made.
Iterative development with tests
We build in short iterations with automated tests from day one. Every feature ships with its test suite and passes code review before being merged, no exceptions.
Deployment and evolution
We automate deployment with CI/CD and production monitoring. Your application ships frequently and safely, ready for years of evolution without traumatic rewrites.
Frequently asked questions about hexagonal architecture and DDD
What is hexagonal architecture and why should I care?
It is an architecture style that places your business logic at the centre, isolated from frameworks, databases and external APIs. You should care because it reduces maintenance cost — 80% of total software cost — and allows changing technologies without rewriting the application.
Is Domain-Driven Design only for large projects?
No. DDD principles — ubiquitous language, domain modelling, bounded contexts — improve projects of any size. On small projects we apply a pragmatic version: only the patterns that add real value, no unnecessary bureaucracy.
Can you work on our existing code?
Yes. We first assess the current state with a technical audit and propose an improvement plan: from targeted refactorings to a progressive migration towards a hexagonal architecture, always keeping the service running.
Which technologies do you work with?
Our main stack is PHP with Symfony and Java with Spring, with PostgreSQL, MySQL and Redis databases, deployed with Docker and orchestrated with Kubernetes. Hexagonal architecture makes these choices replaceable in the future.