Micro-Frontend Architecture for an Insurance System Processing 50K Quotes a Week

The Quote Management System started as one React app serving several insurance product lines. That was fine until multiple teams needed to ship changes to their own quote module without waiting on someone else's release.

The split

A thin shell app composes independently built and deployed quote modules. Each module owns its own form validation, its own API integrations, and its own deploy pipeline. The shell's job is composition and shared navigation, not business logic.

What it bought us

• A product team could ship a change to their own quote flow without a coordinated release across every other module.
• Code-splitting fell out of the architecture almost for free — each module is a natural chunk boundary, which mattered once we were serving 50,000+ quotes a week and page weight was directly on the critical path.
• Faster incident isolation: a bug in one product line's module rarely meant redeploying the whole app.

What it cost

Shared concerns — a consistent design system, a common form-validation approach, a single source of truth for cross-module state — need deliberate ownership, or every module quietly reinvents them. That coordination overhead is the real price of a micro-frontend split, and it's worth paying only once independent deployability is an actual constraint, not a nice-to-have.