VectorIcons Infrastructure Overview

Note: This is a curated subset of the service-oriented architecture backend for VectorIcons, a multi-vendor marketplace for SVG icons & illustrations, shared for portfolio purposes. It is not runnable as-is due to removed infrastructure dependencies (authentication layers, payment processing, deployment configurations, and proprietary database connections). This repository demonstrates architecture, code quality, testing practices, and systems thinking.

Overview

VectorIcons is a production multi-vendor marketplace for vector icons and illustrations, built as a distributed system across multiple specialized services. This portfolio showcases the service-oriented architecture (SOA) backend layer, demonstrating Staff/Principal Engineer capabilities in systems design, performance engineering, and cloud-native architecture.

Key Highlights:

• 750,000+ vector assets managed
• 14M+ database records
• 90%+ test coverage with contract-based testing
• 16x performance improvement in batch processing (45 minutes vs 11.5 days estimated)
• Production-ready with comprehensive observability and error handling

Table of Contents

• VectorIcons Infrastructure Overview
  • Overview
  • Table of Contents
  • Documentation Sections
    • Architecture & Design
    • Core Infrastructure
    • Cursor Pagination
    • Caching Layer
    • Event System
    • Access Control
    • AWS Integration
    • Products Domain
    • Images Domain
    • Carts Domain
    • Orders Domain
    • Transactions Domain
    • Downloads Domain
    • Favorites Domain
    • HTTP API Layer
  • Additional Resources
    • Related Documentation
    • Blog Posts
    • Professional Profile

Documentation Sections

Architecture & Design

Comprehensive architectural documentation including the complete system architecture and key architectural decision records (ADRs).

• System Architecture - Complete multi-service ecosystem overview with architecture diagrams
• ADR-001: Service-Oriented Architecture - Why SOA, trade-offs, and implementation patterns
• ADR-002: Mixin Pattern - Capability composition without inheritance
• ADR-003: Event-Driven Architecture - Decoupling through events
• ADR-004: Contract-Based Testing - Ensuring consistency across 78 modules
• ADR-005: Entity Immutability - Preventing accidental mutations

Core Infrastructure

Foundation classes that all services extend. Demonstrates DRY principles and template pattern implementation.

• BaseService - Abstract service with shared CRUD operations, caching, events, and observability
• BaseRepository - Database abstraction with Objection.js ORM
• BaseEntity - Immutable domain entities with validation

Cursor Pagination

High-performance pagination for large datasets using cursor-based approach instead of offset-based.

• CursorEncoder - Encodes/decodes pagination cursors
• withCursorPagination - Repository mixin for cursor support
• cursorPaginate - Helper function for paginated queries

Caching Layer

Pluggable caching with multiple backend adapters (Redis, in-memory) and automatic cache invalidation.

• CacheService - Abstract cache interface
• RedisCacheAdapter - Production Redis implementation
• NodeCacheAdapter - Development in-memory cache

Event System

Domain events for observability, audit trails, and decoupled side effects. Supports in-memory and Redis pub/sub.

• EventBus - Central event dispatcher
• Event - Event value objects
• Adapters - Memory and Redis implementations

Access Control

Role-based access control (RBAC) with fine-grained permissions.

• AccessControlService - Permission checking and enforcement

AWS Integration

AWS service integrations for cloud-native operations.

• S3Service - Object storage operations
• SNSService - Pub/sub notifications
• SQSService - Queue management

Products Domain

Core product management including icons, illustrations, sets, families, and taxonomies.

Entities: Icons, Illustrations, Sets, Families, Categories, Tags, Styles, Product Types, Subscription Plans

Images Domain

Image processing, storage, and metadata management with multiple format support (PNG, WebP, SVG).

Services: ImageService, ImageTypeService, ImageProcessorService, PreviewService

Carts Domain

Shopping cart management with atomic operations and transaction safety.

Entities: Cart, CartItem

Orders Domain

Order processing and fulfillment tracking.

Entities: Order, OrderItem

Transactions Domain

Financial transaction tracking with comprehensive audit trail and multiple payment types.

Entities: Transaction, TransactionItem, TransactionType, TransactionCategory, PaymentType

Downloads Domain

Download tracking and analytics for user activity monitoring.

Entities: Download

Favorites Domain

User favorites/wishlist management.

Entities: Favorite

HTTP API Layer

RESTful API built on Fastify with factory pattern for rapid endpoint creation, schema validation, and consistent error handling.

Components:

• Plugins - Route implementations for each domain (Icons, Families, Sets, Categories, Tags, Images)
• Factory Methods - Reusable route generators (list, getItem, createItem, patchItem, deleteItem)
• Schemas - JSON Schema validation for all endpoints

Additional Resources

Related Documentation

• Complete README - Detailed technical implementation guide
• GitHub Repository - Full source code

Blog Posts

• Building a Multi-Vendor Marketplace: Architecture Lessons - Systems design insights
• 16x Performance Improvement with Go Concurrency - Real-world optimization case study
• Contract-Based Testing at Scale - (Coming Soon) Maintaining consistency across 78 modules

Professional Profile

• LinkedIn - Connect with me professionally
• GitHub - More open source projects

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Developer: Scott Lewis Technology Stack: Node.js, Fastify, PostgreSQL, AWS, Go, React/Next.js Documentation Generated: 2025-10-18