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✅ Architect Level
Communication Patterns
Complete Beginner → Advanced Syllabus (Pin-to-Pin)
🟢 LEVEL 1 — Fundamentals
1. Communication Basics
- Synchronous vs asynchronous
- Request-response patterns
- Publish-subscribe patterns
- Protocol selection
2. HTTP Foundation
- HTTP methods (GET, POST, PUT, DELETE)
- Status codes
- Headers & content types
- Request-response cycle
🟢 LEVEL 2 — REST APIs
3. REST Principles
- Resource-oriented design
- Statelessness
- Cacheable responses
- Uniform interface
4. RESTful API Design
- Endpoint naming conventions
- HTTP method usage
- Request/response structure
- Error handling
🟡 LEVEL 3 — GraphQL Basics
5. GraphQL Fundamentals
- GraphQL vs REST comparison
- Query language definition
- Strongly typed schema
- Single endpoint architecture
6. GraphQL Queries & Mutations
- Query writing
- Variable usage
- Fragments & reusable queries
- Mutation operations
🟡 LEVEL 4 — Advanced GraphQL
7. Schema Design
- Type definitions
- Relationships & nesting
- Directives for schema control
- Custom scalar types
8. Subscriptions & Real-time
- WebSocket subscriptions
- Real-time data updates
- Cache invalidation
- Connection management
🟠 LEVEL 5 — gRPC Introduction
9. gRPC Fundamentals
- Protocol Buffers (protobuf)
- Binary serialization
- HTTP/2 multiplexing
- gRPC vs REST performance
10. gRPC Communication Types
- Unary RPC
- Server streaming
- Client streaming
- Bidirectional streaming
🟠 LEVEL 6 — Message Queues
11. Asynchronous Messaging
- Message brokers (RabbitMQ, Kafka)
- Decoupling producers & consumers
- Message ordering & delivery guarantees
- Durability & persistence
12. Queue Patterns
- Point-to-point messaging
- Work distribution
- Dead letter queues
- Consumer groups
🔵 LEVEL 7 — Pub/Sub Systems
13. Publish-Subscribe Patterns
- Topic-based messaging
- Multiple subscribers
- Fan-out distribution
- Topic filtering
14. Event Streaming
- Kafka architecture
- Partitions & consumer groups
- Offset management
- Exactly-once semantics
🔵 LEVEL 8 — WebSockets & Real-time
15. WebSocket Protocol
- Persistent connections
- Building real-time features
- Server push capabilities
- Fallback mechanisms
16. Real-time Architectures
- Live notifications
- Collaborative editing
- Real-time dashboards
- Stream processing
🔴 LEVEL 9 — Advanced Patterns & Governance
17. Hybrid Communication
- Choosing REST vs GraphQL vs gRPC
- Multi-protocol architecture
- Protocol migration strategies
- API versioning & evolution
18. Communication Governance
- API contracts & specifications
- Rate limiting & throttling
- Security & authentication across protocols
- Observability & monitoring
⭐ Senior Frontend Focus (Must Master)
- REST API contract testing from frontend
- GraphQL client libraries (Apollo, Urql)
- GraphQL caching strategies
- Real-time sync with WebSockets
- Handling offline connectivity
- Request batching & deduplication
- Frontend error handling for all protocols