🛡️ Insurance · C4 Architecture · Pro
Insurance Policy Administration System
The core system of an insurer: quoting, underwriting, policy issue, billing and claims, used by customers, agents and underwriters.
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Drawing diagram…
What this diagram shows
- Customer portal and agent app share one API layer
- Rating and underwriting rules run in their own services
- Policy documents are generated and stored centrally
Prompt used
An insurance policy administration system: customers use a portal and agents use a mobile app, both calling an API gateway. Services: quote and rating service, underwriting service with a rules engine, policy service (issue, endorsements, renewals), billing service and claims service. Data in PostgreSQL, documents generated as PDFs into object storage. External systems: payment gateway, credit/medical data providers and a reinsurer.
Mermaid code
C4Container
title Policy Administration System
Person(customer, "Customer", "Buys and renews policies")
Person(agent, "Agent", "Sells policies")
System_Boundary(pas, "Policy Administration") {
Container(portal, "Customer Portal", "React", "Quotes, policies, claims")
Container(agentapp, "Agent App", "Flutter", "Leads and proposals")
Container(api, "API Gateway", "Kong", "Auth and routing")
Container(rating, "Quote and Rating", "Java", "Premium calculation")
Container(uw, "Underwriting Service", "Java + Drools", "Risk rules")
Container(policy, "Policy Service", "Java", "Issue, renew, endorse")
Container(claims, "Claims Service", "Node.js", "Claim intake and status")
ContainerDb(db, "Policy DB", "PostgreSQL", "Policies and claims")
}
System_Ext(pay, "Payment Gateway", "Premium payments")
System_Ext(data, "Data Providers", "Credit and medical data")
Rel(customer, portal, "Uses")
Rel(agent, agentapp, "Uses")
Rel(portal, api, "Calls")
Rel(agentapp, api, "Calls")
Rel(api, rating, "Routes")
Rel(rating, uw, "Requests decision")
Rel(uw, data, "Checks")
Rel(api, policy, "Routes")
Rel(api, claims, "Routes")
Rel(policy, db, "Stores")
Rel(policy, pay, "Collects premium")Related templates
Insurance Claims Lifecycle
The states of an insurance claim from first notice of loss to payment or closure, including investigation and appeals.
Insurance Underwriting Workflow
How a life or health insurance proposal is underwritten: automated rules, medical tests where needed, and the underwriter's decision.
Insurance Quote to Bind Sequence
How a customer buys motor insurance online: quote, add-ons, vehicle and previous-policy checks, payment and instant policy issue.
Insurance Database Schema
A relational schema for an insurer: customers, policies, coverages, insured objects, premiums, claims and payments.
Insurance Claim Fraud Scoring
How an insurer scores incoming claims for fraud: data enrichment, rules, an ML model and a special investigation unit queue.
Motor Insurance Claim Sequence
What happens between a policyholder, the insurer's app, a surveyor and a garage when a car insurance claim is made.