At Chenst Management System, I own the core transaction pipeline for a treasury and tax platform processing more than ₦20B. I designed it for guaranteed delivery, idempotent writes, append-only audit logging, and financial correctness under load.
I also replaced pure JWT authentication with durable, versioned session records, adding session revocation, device controls, and real-time presence. A three-tier rate limiter cut third-party verification spend 16×.
At Theralink, I designed and delivered a HIPAA-compliant EHR backend managing approximately 100,000 patient records. Redis caching, PostgreSQL indexes, and cursor-based pagination reduced median API latency from 1,000 ms to 300 ms.
On my multi-tenant booking marketplace project, I used PostgreSQL row-level security to prevent cross-tenant data leaks and transaction-level locking to prevent double bookings. I also built an idempotency system to prevent duplicate payment charges and provisioned AWS EKS infrastructure with Terraform.
