TECHNICAL ARCHITECTURE // STACK OVERVIEW
SYSTEM ARCHITECTURE v4.2
TECHNOLOGY STACK // 5 LAYERS
L1
PRESENTATION LAYER
FASTAPI
API GATEWAY
NGINX
REVERSE PROXY
CLOUDFLARE
EDGE CDN
L2
APPLICATION LAYER
CELERY
TASK QUEUE
REDIS
CACHE / PUB-SUB
ASYNC WORKERS
PARALLEL EXEC
L3
AI / ML LAYER
OLLAMA ENGINE
LOCAL LLM
LANGCHAIN
ORCHESTRATION
PYTORCH
MODEL TRAINING
L4
DATA LAYER
QDRANT
VECTOR DB
CLICKHOUSE
ANALYTICS DB
KAFKA
EVENT STREAMS
L5
INFRASTRUCTURE LAYER
KUBERNETES
ORCHESTRATION
ISTIO
SERVICE MESH
PROMETHEUS
OBSERVABILITY
ENGINEERING PRINCIPLES // HOW WE THINK
01
ZERO SINGLE POINTS
Every service is replicated across minimum 3 availability zones. No single component controls the critical path.
02
ASYNC BY DEFAULT
All non-critical operations are event-driven. Celery workers process background jobs. Redis pub/sub coordinates state.
03
INSTRUMENT EVERYTHING
Prometheus scrapes every endpoint. Grafana dashboards surface P99 latency, error rate, and throughput in real-time.
04
SCHEMA FIRST
Pydantic enforces strict input validation at every boundary. Breaking changes require versioned migration paths.
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ARCHITECTURE LAYERS
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P99 API TARGET