ArchGen

System Block Diagram of a SaaS Web Application

Focus: Client -> Services -> Data -> Ops. Key areas: React, Next.js, TypeScript.

Use this as a block diagram of the system when explaining architecture.

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Diagram caption: System Block Diagram of a SaaS Web Application (Client -> Services -> Data -> Ops) has 4 layers: Client & Edge, Application Services, Data & Async, Platform & Observability.

Prompt

Create a system block diagram of a SaaS web application. Include client UI, auth/identity, edge gateway, API gateway, core services (user/billing/content), data storage, cache, async messaging/queues, and platform observability/security. Keep it concise with 4–5 layers, 3–5 modules per layer, and 2–3 items, responsibilities, and technologies per module.
Highlights
  • Key flows: Users authenticate via SSO/OIDC at the edge, receive JWTs, and call the API Gateway which routes requests to core services and the primary database.
  • Layer details · Client & Edge: Modules include Web Client, Auth & Identity, Edge Gateway.
  • Module responsibilities · Client & Edge / Web Client: Render product UI; Collect user input; Call APIs securely

Overview

System Block Diagram of a SaaS Web Application (Client -> Services -> Data -> Ops) has 4 layers: Client & Edge, Application Services, Data & Async, Platform & Observability.

Layer details

Show all (4)
  • Client & Edge: Modules include Web Client, Auth & Identity, Edge Gateway.
  • Application Services: Modules include API Gateway, User & Billing Service, Workspace/Content Service.
  • Data & Async: Modules include Primary Database, Cache Layer, Event & Job Queue.
  • Platform & Observability: Modules include CI/CD & Release, Monitoring & Logging, Security & Compliance.

Module responsibilities

Show all (12)
  • Client & Edge / Web Client: Render product UI; Collect user input; Call APIs securely
  • Client & Edge / Auth & Identity: Authenticate users; Issue JWTs; Enforce access policies
  • Client & Edge / Edge Gateway: Protect APIs; Route traffic; Mitigate abuse
  • Application Services / API Gateway: Expose unified API; Enforce policies; Aggregate endpoints
  • Application Services / User & Billing Service: Manage users and plans; Handle billing events; Emit lifecycle signals
  • Application Services / Workspace/Content Service: Handle core domain data; Enforce access control; Publish content events
  • Data & Async / Primary Database: Store transactional data; Support queries; Ensure consistency
  • Data & Async / Cache Layer: Reduce latency; Offload database; Store ephemeral state
  • Data & Async / Event & Job Queue: Decouple workloads; Guarantee delivery; Coordinate background work
  • Platform & Observability / CI/CD & Release: Automate releases; Promote versions; Rollback safely
  • Platform & Observability / Monitoring & Logging: Track SLOs; Debug incidents; Alert on anomalies
  • Platform & Observability / Security & Compliance: Protect credentials; Enforce least privilege; Support compliance

Key flows

Show all (3)
  • Users authenticate via SSO/OIDC at the edge, receive JWTs, and call the API Gateway which routes requests to core services and the primary database.
  • Core services publish events to the queue for async jobs and webhook delivery, while cache handles hot reads and session data.
  • CI/CD pipelines deploy updates, and observability plus audit logs provide operational visibility and compliance tracking.