Backend / AI / Distributed Systems

Entero Multi-Currency Wallet & AI Recommendation Platform

Built core backend architecture for a platform serving 10K+ daily users. The system combined a polymorphic rule engine, transaction-safe wallet operations, event-driven bonus calculations, and semantic product recommendations over a 1M+ product catalog.

Problem

The platform needed to process multiple service types, financial bonus logic, and intelligent product recommendations under strict latency requirements.

Solution

Designed a rule-driven service architecture backed by optimized PostgreSQL queries, Redis caching, message-based bonus calculation, and semantic search.

Architecture

FastAPI services, PostgreSQL with indexing strategy, Redis caching, event-driven transaction processing, and Elasticsearch-backed recommendation flows.

Impact

Reduced critical response times from roughly 2 seconds to 200ms and supported 50K+ daily transactions with reliable concurrent wallet behavior.