At Krayvins, I architected a Django platform coordinating food-delivery orders and rider and chef workflows for 1,000+ users. I built live order tracking and messaging with Django Channels.
I engineered a payment engine integrating Paystack, Flutterwave, and TGI Pay, with automated provider failover and idempotent webhook processing that cut transaction failures by 25%. I also designed an immutable double-entry ledger and settlement engine for wallet operations.
I owned production infrastructure across AWS and DigitalOcean, including containerized deployments and blue-green releases. PostgreSQL optimistic locking helped resolve order-state concurrency conflicts, while Valkey and Redis caching cut database load by 40%.
I'm independently building TrustWire, an escrow and settlement backend in Rust with Axum, SQLx, and Tokio. It applies ledger and idempotent-processing patterns from my production experience to a from-scratch architecture.
