Streaming and history have separate paths
WebSockets carry live updates while PostgreSQL backs historical queries, keeping each interaction aligned with its data shape.
Real-time systems
CryptoTracker
A containerized BTC, ETH, and SOL tracker with live WebSocket streaming, historical persistence, security controls, and Kubernetes manifests.
ARCHITECTURE / CONCEPTUAL VIEW
Derived from public repository documentation
01Binance Streaminfrastructure
02Node.js APIservice
03WebSocket Clientinterface
04PostgreSQLdata
05Kubernetesinfrastructure
CHALLENGE
What the system needed to solve.
Live market data is only useful when the experience stays current, reconnects cleanly, persists history, and protects its application surface.
CONSTRAINTS
The boundaries that shaped the build.
- Stream changing prices without constant page refreshes.
- Persist enough history for useful trend views.
- Package the system for local and production-like deployment.
ENGINEERING DECISIONS
Choices with consequences.
Failure recovery is visible
The client reconnects after stream interruption rather than assuming a permanent connection.
Deployment is documented as code
Docker Compose and Kubernetes manifests describe the application, API, database, ingress, and secret boundaries.
RELIABILITY CONSIDERATIONS
Prepared for the operating reality.
- Origin validation and rate limiting
- Indexed historical price queries
- Health endpoint and reconnect behavior
OUTCOMES / HONEST EVIDENCE
What can be stated today.
- The public repository documents the full stream-to-storage architecture.
- Load-test results and production traffic metrics are pending.
TECHNOLOGY