Hessah
Backend foundation for a real-estate investment platform serving web and mobile clients.
Node.jsExpressMongoDBFlutterNext.js
Backend ArchitectureAPI DesignCross-PlatformData Consistency
Overview
Hessah is a real-estate investment product consumed by both web and Flutter clients. My scope centered on backend services and API contracts that keep portfolio, transaction, and user data consistent across platforms.
Problem
Multi-client products can drift when APIs evolve quickly, causing mismatched states and brittle frontend integrations.
Solution
I designed backend contracts and data models with predictable versioning and strict response consistency to support parallel client development without breaking flows.
Impact
- Stabilized API behavior for both mobile and web client teams.
- Reduced integration churn by enforcing clear contract boundaries.
- Enabled reliable synchronization of investment-related state transitions.
Features
- Cross-client REST API contracts for web and mobile
- Consistent investment domain modeling and response shapes
- Scalable endpoint structure with maintainable service separation
- Version-aware integration strategy for iterative feature delivery