Solution Strategy

Technology Decisions

Decision Technology Rationale

Frontend Framework

NextJS with TypeScript

Server-side rendering for SEO (critical for property listings), static generation for performance, TypeScript for type safety, and React ecosystem for rich UI components.

Backend Services

Python

Strong ecosystem for data processing, machine learning (property recommendations), geospatial computations, and integration with analytics libraries.

Database & Auth

Supabase (PostgreSQL)

Managed PostgreSQL with built-in authentication and real-time subscriptions. Reduces operational overhead and provides row-level security.

File Storage

Google Cloud Storage (GCS)

Object storage for property images, documents, and virtual tour assets. Native integration with Cloud CDN for global delivery and with GCP IAM for access control.

Map Services

Google Maps + Mapbox

Google Maps provides geocoding, directions, and Plus Code support. Mapbox provides high-performance map rendering and advanced geofencing capabilities.

Workflow Engine

Windmill

Orchestrates complex business workflows (e.g., property verification, payment processing, notification chains) with a visual workflow builder.

Cloud Platform

Google Cloud Platform

Cloud Run for serverless containers, Cloud CDN for global content delivery, Cloud Load Balancer for high availability, and integrated monitoring/logging.

Architectural Approach

The platform follows a modular, cloud-native architecture with the following key strategies:

High Availability (99.999%)

  • Cloud Load Balancing distributes traffic across multiple Cloud Run service instances

  • Cloud CDN caches static content globally for faster delivery and reduced backend load

  • Supabase provides managed PostgreSQL with automatic failover

  • A single load balancer IP serves multiple asta.homes subdomains, reducing cost and complexity

Responsive Design

  • NextJS enables server-side rendering for fast initial page loads on any device

  • Adaptive image quality adjusts rendering based on device capabilities

  • Progressive Web App (PWA) patterns for mobile-first experience

Intelligent Search

  • Natural language processing parses user queries (e.g., "properties 30 minutes from Kotoka airport")

  • Spelling error tolerance using fuzzy matching algorithms

  • Ghana Post Digital GPS Address decoding supports both formatted (GA-543-0125) and unformatted (GA5430125) codes

  • Geofencing on map displays highlights search result areas

Security Strategy

  • Workload Identity Federation eliminates shared service account passwords between GitHub/Azure DevOps and GCP

  • Account Federation between Google Workspace and Azure Entra for single sign-on

  • PCI DSS compliance for payment processing

  • GDPR compliance for personal data protection

  • Row-level security in Supabase for data isolation

Data-Driven Decisions

  • Machine learning models for property recommendations

  • Market data analysis and visualization for informed investment decisions

  • Cloud Monitoring and Cloud Logging for application performance tracking and usage insights

Quality Goal Mapping

Quality Goal Architectural Approach

Availability (99.999%)

Multi-instance Cloud Run services behind Cloud Load Balancer, Cloud CDN for static content, managed database with failover

Usability

NextJS SSR for fast rendering, responsive design, intuitive UI with natural language search, adaptive image quality

Performance

Cloud CDN edge caching, SSR for initial load, optimized database queries, spatial indexing for map searches

Security

Workload Identity Federation, Supabase auth with JWT, PCI DSS and GDPR compliance, row-level security

Scalability

Serverless Cloud Run auto-scaling, CDN for static content offloading, managed database scaling