Building Reusable Business Modules

Enterprise products share more than we admit. Approval workflows, RBAC, audit trails, and CRUD scaffolding appear in nearly every module — yet teams rebuild them from scratch.

Identify Cross-Cutting Capabilities

Before writing feature code, catalog capabilities that repeat:

• Authorization — who can perform what action on which resource
• Workflows — multi-stage approval routing
• Audit — immutable change history
• Notifications — event-driven user alerts
• Dynamic CRUD — metadata-driven data operations

These become platform modules, not per-feature implementations.

Design for Composition

Reusable modules expose interfaces, not implementations:

// Feature module consumes workflow engine
await workflowEngine.submit({
  entityType: 'leave_request',
  entityId: request.id,
  stages: tenantConfig.approvalStages,
});

The leave management feature doesn't know how approvals are routed — it delegates to the shared engine.

Avoid Framework Coupling

Business modules should not import Express handlers or React components in domain logic. Keep use cases pure; wire them in presentation layers.

Metadata Over Code

Where business rules vary by tenant or product line, prefer configuration:

• Approval stage definitions
• Pricing rule engines
• Form field schemas

This reduces code paths and accelerates customization without deployments.

Result

Teams ship ERP modules, CRM portals, and HRMS features faster because the hard enterprise primitives already exist — tested, secured, and consistent.