Enterprise Application Architecture & Complete Data Flow Blueprint

💻

Web Application

Next.js 14 SSR · SPA

Sends HTTPS requests with TLS 1.3 encryption.

Port 443 JSON / REST

🌐

Route 53 Anycast DNS

Global Traffic Director

Resolves domain to closest healthy server IP.

UDP 53 100% SLA

⚡

Cloudflare Edge CDN

Static Caching & Shield

Serves static files in <10ms from 310+ cities.

HTTP/3 QUIC Brotli Cache

📱

Mobile App Clients

iOS & Android React Native

High-efficiency binary Protobuf communication.

gRPC / TLS Cert Pinning

🔗

Third-Party Webhooks

Stripe · GitHub · Twilio

HMAC-SHA256 signed payment & event webhooks.

Inbound HTTPS HMAC Signed

🛡️

AWS WAF & Shield

Layer 7 Threat Firewall

Blocks SQLi, XSS, SSRF & malicious bots.

HTTPS / 443 OWASP Top 10

⚖️

Application Load Balancer

Active-Active Multi-AZ (ALB)

Terminates public TLS & distributes traffic.

TLS 1.3 Term Auto-scaled

🚪

Teleport Zero-Trust Proxy

Audited Bastion / SSH Access

MFA-gated engineer access with session recording.

SSH / 3022 Cert Based

🔒

NAT Gateway Cluster

Outbound SNAT Egress Filter

Allows private servers to reach internet securely.

Outbound Only Zero Inbound

🚦

Envoy API Gateway

Ingress Reverse Proxy & Router

Validates JWT tokens, rate limits, and routes paths.

Port 8080 Rate Limiting

🔐

Auth & Identity Service

OAuth 2.1 · OIDC · JWT Engine

Verifies credentials and issues signed RS256 tokens.

gRPC 50051 Argon2id

🔑

HashiCorp Vault / KMS

Dynamic Secrets & Rotation

Provides ephemeral database credentials & encryption keys.

mTLS API HSM Backed

🕸️

Istio Service Mesh

Zero-Trust Pod Communication

Enforces mutual TLS (mTLS) with SPIFFE identities.

Port 15001 mTLS Auto

⚙️

Core API Pod [AZ-1A]

Go Microservice (AZ-1a)

Processes transactions & domain logic.

Port 8080 HPA Pod

⚙️

Core API Pod [AZ-1B]

Go Microservice (AZ-1b)

Cross-AZ redundancy handling read traffic.

Port 8080 Multi-AZ

🛒

Checkout Service

Saga Orchestration

Coordinates distributed ACID orders.

gRPC 50051 ACID State

💳

Payment Vault

PCI-DSS Tokenized Enclave

Isolated enclave handling credit card tokens.

Nitro Enclave PCI-DSS L1

📨

Apache Kafka Event Stream (3 Brokers)

Partitioned High-Throughput Log Stream · KRaft Mode

Decouples heavy background jobs from fast synchronous user requests.

TCP 9092 3x Replication Zero Data Loss

⚡

Background Worker Pool (Celery / BullMQ)

KEDA Autoscaled Asynchronous Consumers

Consumes Kafka events to generate invoice PDFs and send transactional emails.

Queue Listeners DLQ Retry

📊

OpenTelemetry & Prometheus APM

Distributed Tracing (W3C Traceparent) & Live Metrics

Tracks end-to-end P99 latency and system health across every microservice.

OTLP 4317 Jaeger / Grafana

🚀

Redis Cluster (6 Nodes)

In-Memory Cache & Active Session Store

Serves data in 0.3ms, preventing database overload.

Port 6379 Sentinel Failover

🗄️

PostgreSQL Primary Master

AWS Aurora Multi-AZ Write Master (ACID)

Permanent authoritative ledger for financial orders.

Port 5432 AES-256 KMS WAL Stream

📑

PostgreSQL Read Replica Pool

Asynchronous WAL Read Offloader

Handles all search & report queries to keep master fast.

Port 5432 Auto-Failover

🔍

OpenSearch / Elasticsearch Cluster

Distributed Full-Text Search & Log Analytics

Powers sub-second product catalog search & indexing.

Port 9200 Sharded Index

🪣

Amazon S3 Encrypted Object Store

Immutable Blobs, Receipts & Cold Storage

Stores PDF invoices and backups via private VPC endpoints.

VPC PrivateLink 11 9s Durability