DELVA
Engineering

Built for speed and scale

A modern stack optimized for African connectivity, battery life, and operational control.

Stack overview

Frontend

  • Kotlin — Customer & Provider Android apps
  • Swift — iOS (roadmap)
  • Next.js — Admin & marketing web

Backend

  • NestJS — REST API, auth, business logic
  • Go — High-performance order matching
  • WebSockets — Real-time updates

Infrastructure

  • Supabase — Auth, Postgres, RLS
  • PostgreSQL + PostGIS — Geo queries
  • Redis — Catalog cache & sessions

Edge & delivery

  • Cloudflare — CDN & edge security
  • FCM — Push notifications
  • Offline-first mobile patterns

Performance principles

Every layer is tuned for lightweight clients and fast API responses.

  • Lazy loading and minimal JS on web
  • Redis-cached public catalog endpoints
  • Battery-efficient location & map usage
  • Idempotent payments and fee RPCs
  • Security definer functions for money movement
  • Mobile-first responsive admin