COMPLETED
Image Processing API
Enterprise-level image processing system with microservices architecture. Implements Clean Architecture, CQRS and Event-Driven Architecture. Backend Sr. Technical Test for KairosDS.
TypeScript · Node.js · Express.js · MongoDB · Redis · BullMQ · Docker · Sharp · Clean Architecture · CQRS
Architecture
Enterprise hybrid system combining:
- Service Layer: REST API with synchronous responses
- CQRS + Event-Driven: Asynchronous worker with Redis Pub/Sub
- Clean Architecture: Strict separation of concerns
Components
| Service | Description |
|---|---|
| API Backend | Express.js REST API |
| Worker | Image processor with Sharp |
| MongoDB | Main database |
| Redis | Cache + Queue storage |
| Prometheus | System metrics |
| Grafana | Monitoring dashboard |
Testing
100% coverage on critical components:
- CommandBus, QueryBus, Mediator
- Command & Query Handlers
- TaskEvents (Redis Pub/Sub)
- CacheService, TaskQueueProducer
Tech Stack
- Backend: Node.js, Express.js, TypeScript
- Database: MongoDB with optimized schemas
- Queue: BullMQ v5 enterprise-grade
- Cache: Redis with Cache-Aside pattern
- DevOps: Docker Compose, Traefik, Loki