Build a Spring Boot + React + Flutter App with AI Agents
April 10, 2025 · Katappult Team
How do you build a complete Spring Boot + React + Flutter application by supervising AI agents? This guide shows how Katappult orchestrates backend, web frontend, and mobile app generation — producing production-ready code from the very first iteration.
The requirement
A reservation management application for a medical practice:
- Patients, Doctors, Appointments, Consultations
- Secure REST API
- Responsive React interface (web) + Flutter mobile app
Supervising AI agents
By describing this need to Claude Code via Katappult's MCP server, AI agents generate in 10 minutes:
Spring Boot Backend
- JPA entities with relationships
- Spring Data repositories
- Services with business logic
- REST controllers with validation
- Spring Security configuration (JWT)
- Integration tests + CI/CD
React Frontend
- Components for each screen
- State management
- Typed API calls
- Forms with validation
Flutter Mobile App
- Native iOS and Android screens
- Same data model as the backend
- Connected to the Spring Boot REST API
Database
- Versioned Liquibase migrations
- Optimized indexes
- Integrity constraints
The result
A production-ready application — web and mobile — in 10 minutes. You'll need a few additional hours to customize it for your specific business needs, but the foundation is solid and you own 100% of it.
That's Katappult's promise: you supervise the AI agents, Katappult ensures the result is reliable, tested, and ready for production.