Bluu System Design¶
Documentation for the system design and domain architecture of Bluu, the Best Personal Finance Platform.
Purpose¶
This documentation describes the system design and domain architecture of Bluu. It organizes the platform into well-defined domains, subdomains, and technical components following Domain-Driven Design (DDD) principles.
The goal is to establish a shared understanding across design, product, and engineering teams of how the system works, what it does, and why each part exists.
Design Principles¶
- Domain-Driven Design (DDD): Each major business capability is modeled as a separate domain with clear boundaries.
- Event-Driven Architecture: Key state changes are represented as domain events to enable modularity and scalability.
- Separation of Concerns: Core financial logic is isolated from supporting infrastructure (UI, integrations, etc.).
- Privacy by Design: User data is processed under explicit consent and can be deleted, exported, or anonymized at any time.
- Evolutionary Architecture: The system can evolve over time as financial rules, user needs, and regulations change.
Domain Landscape¶
The platform is divided into three types of domains:
| Type | Description |
|---|---|
| Core Domains | Contain the essential business logic that differentiates the product. |
| Supporting Domains | Enable the core capabilities (integrations, analytics, reporting). |
| Generic Domains | Provide common cross-cutting infrastructure like identity, consent, and notifications. |
Documentation Structure¶
Overview¶
Introduction to the Bluu platform, vision, and foundational concepts.
- Vision - Platform vision and core values
- Glossary - Key terms and definitions
- Tech Stack - Technology choices and infrastructure
Architecture¶
Architectural diagrams, domain models, and design documentation.
- Domain Map - Business capabilities and domain organization
- Context Map - Domain relationships and boundaries
- Architecture Diagram - High-level system architecture
- Domain Models - Core entities and relationships
- Event Flows - Event-driven interactions
- Q&A — Redundancies & Boundaries - Common questions
Reference¶
Reference materials and terminology.
- Ubiquitous Language - Standardized terminology
- Brainstorming Session - Initial ideation notes
Getting Started¶
- Start with the Overview to understand the platform's purpose and vision
- Review the Domain Map to see how the system is organized
- Explore specific domains and architecture documents as needed
- Refer to the Ubiquitous Language for consistent terminology
Built with Domain-Driven Design principles