Expendi Savings Platform
Savings platform leveraging DeFi yields to help Africans earn competitive returns on their savings. Cross-border savings solution with bank-level security, abstracting blockchain complexity while providing users with traditional banking simplicity combined with modern financial returns.
Client
Hifadhi Financial Services
Timeline
2023 - 2024
Duration
14 months
The Challenge
African savers needed a simple, secure way to save money across borders while earning competitive returns. Traditional banks offered minimal interest, and cross-border savings were complex. The platform needed to handle distributed data across 12 countries while providing DeFi yields without exposing users to cryptocurrency complexity.
Managing distributed data nodes across 12 African countries with varying regulations
Maintaining sub-millisecond encryption/decryption cycles at scale for instant access
99.99% availability SLA for users' financial data
Implementing DeFi yield generation while abstracting blockchain complexity from users
Data sovereignty compliance across multiple jurisdictions
Cost-effective storage while maintaining enterprise security
Our Solution
Built a geo-distributed savings platform with DeFi yield integration, edge encryption, and automated compliance engines. Users enjoy traditional banking simplicity with DeFi returns, all while maintaining bank-level security.
Phase 1: Infrastructure Architecture
Designed multi-region storage architecture on AWS with automated geo-replication. Implemented Kubernetes orchestration for zero-downtime deployments and auto-scaling across 12 African countries.
Phase 2: Security Implementation
Deployed AES-256 edge encryption with hardware security modules (HSM). Every transaction encrypted before leaving user's device. Implemented sharding across nodes for enhanced security and data protection.
Phase 3: DeFi Integration
Integrated DeFi yield generation protocols while abstracting complexity from users. Built smart contract interfaces enabling users to earn competitive returns on savings without understanding blockchain mechanics. Automated yield distribution and compounding.
Phase 4: Compliance Engine
Built custom compliance engine that automatically applies jurisdiction-specific rules based on data location and user origin. Supports GDPR, POPIA, and 10+ African data protection laws ensuring full regulatory compliance.
Technologies Used
Express/GraphQL
High-performance backend services
AWS S3 & Glacier
Multi-tier storage system
Solidity
DeFi yield smart contracts
Docker & Kubernetes
Container orchestration
Terraform
Infrastructure as Code
Redis
Distributed caching layer
PostgreSQL
User data and transaction records
Ethers.js
DeFi protocol integration
Impact & Results
Lithium Labs built us a platform that makes saving money simple and rewarding for everyday Africans. Our users love earning yields without the complexity of crypto.
CEO
Hifadhi Financial Services
Key Features
DeFi-based yield generation for in-app savings
AES-256 edge encryption with HSM support
Automated geo-replication across 12 African countries
Jurisdiction-aware compliance engine for data sovereignty
User-friendly interface abstracting blockchain complexity
Real-time transaction processing with 99.99% uptime