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The article explains how business complexity and maintenance pain points can be mitigated by adopting Domain‑Driven Design, strategic and tactical patterns, hexagonal architecture, and a well‑structured microservice framework—illustrated with Go code examples and practical migration steps for large‑scale systems.
This article explains how to apply Domain-Driven Design (DDD) to a new project, covering terminology, architecture evolution from IAAS/PAAS/SAAS, bounded‑context boundaries, the four DDD layers, clean layered, hexagonal and onion architectures, and practical guidance for backend development.
Understanding an application's architecture—defining clear module and package hierarchies, adopting layered patterns like Hexagonal or Clean Architecture, and applying principles such as Dependency Inversion and CQRS—transforms chaotic codebases into maintainable, testable systems that reduce onboarding time and simplify future development.
The article details Bilibili’s migration of its legacy PHP live‑broadcast service to Go microservices using Domain‑Driven Design and Hexagonal architecture, describing event‑storming, six‑layer tactical design, TDD, traffic‑mirroring migration, and resulting higher reliability, lower latency, and improved maintainability.
The article explains clean, hexagonal, and DDD layered architectures, detailing each layer’s responsibilities, principles, and evolution, and shows how DDD layering enhances microservice design, promotes strict separation, supports architectural evolution, and guides the transition from traditional three‑tier systems to modern domain‑driven microservices.
This article explains the traditional strict and loose layered architectures, highlights their coupling issues, introduces the Dependency Inversion Principle as a solution, and shows how applying it leads to hexagonal and clean architecture designs with illustrative diagrams and code examples.
This article explains why code architecture matters, compares Clean, Hexagonal, Onion and COLA patterns, describes their layered structures and separation‑of‑concerns principles, and provides a practical Go project layout with concrete code examples to illustrate how each layer interacts.
The article explains how Bilibili’s senior engineer uses Domain‑Driven Design combined with hexagonal architecture to merge separate VOD and live‑stream Danmaku services into a unified platform, detailing sub‑domain decomposition, six‑sided ports, rich models, mapping logic, and the trade‑offs of improved modularity, maintainability, and reduced duplication versus added design and refactoring effort.
This article explains how to apply Domain‑Driven Design (DDD) to a new project, covering key terminology, architectural evolution, bounded contexts, the four DDD boundaries, and various layered architectures such as clean, hexagonal, and onion models.
This article explains how to apply Domain-Driven Design (DDD) from project inception, covering key terminology, architectural evolution, bounded contexts, the four DDD boundaries, and various layered architectures such as clean, hexagonal, and onion models to achieve modular, maintainable systems.
This article explains how to start a new project using Domain‑Driven Design, covering terminology, architectural evolution across SaaS, PaaS, IaaS, bounded‑context division, the four DDD boundaries, clean layered, hexagonal and onion architectures, and concludes with practical guidance.
This article explains how the author applied Domain‑Driven Design to build a microservice for an internal trading center, reviewing DDD strategic and tactical design, various architecture layer theories, a customized layered architecture, Maven module structure, and detailed responsibilities of each layer while sharing practical tips and challenges.
The article explains why layered architectures such as Clean, Onion, and Hexagonal are essential for reducing coupling and improving maintainability, introduces the COLA (Clean Object‑oriented and Layered Architecture) derived from them, and presents a concrete Go project scaffold with clearly defined Domain, Application, Infrastructure, and Adapter layers and recommended directory layout.
The article explains the three core principles of Hexagonal (Ports‑and‑Adapters) Architecture, illustrates how to separate application, domain, and infrastructure code with concrete C# examples, and shows how this separation improves testability, dependency inversion, and modular design.
This article explains how to start a new project using Domain‑Driven Design, covering terminology, the evolution from SaaS to IaaS, bounded‑context concepts and division rules, the four DDD boundaries, and how clean, hexagonal, and onion architectures realize these principles for scalable backend systems.
This article explains how to start a new project using Domain‑Driven Design, covering key terminology, architecture evolution from monolith to microservices, bounded context division, the four DDD boundaries, clean layered, hexagonal and onion architectures, and practical design guidelines for backend systems.
This article explains how to apply Domain-Driven Design (DDD) to a new project, detailing the evolution from monolithic to microservice architectures, the concepts of IaaS, PaaS, SaaS, bounded contexts, the four DDD boundaries, and clean, hexagonal, and onion architectural patterns.
This article introduces a modular backend service architecture based on Domain-Driven Design, explaining project structure, module composition, hexagonal architecture, and practical code examples using Spring Cloud, illustrating how to achieve flexible, maintainable services through domain models, adapters, and proper boundary definitions.
This article explains the concept of software architecture, why it is essential, the responsibilities of architects, various architectural classifications, and introduces classic patterns such as layered, CQRS, hexagonal, onion, and the open‑source COLA framework with its design, extension, and specification guidelines.
This article explains how to start a new project using Domain‑Driven Design, introduces key terminology such as IAAS/PAAS/SAAS, describes the evolution of architecture through bounded contexts, and details the four DDD boundaries together with clean layered, hexagonal and onion architectures for building scalable backend systems.