Clement Okiyi

Reviewed and analyzed results from the skill and knowledge extraction pipeline for accuracy; compared extracted skills with original job descriptions to assess precision; collaborated with the data annotator team to improve model performance; contributed to quality assurance processes and data labeling across text, images, and videos; evaluated AI-generated outputs and conducted quality control to ensure dataset integrity.

Developed secure REST APIs using ASP.NET Core with JWT authentication, RBAC, and API versioning; built scalable backend APIs for enterprise e-commerce with 500k+ MAU; integrated Stripe Connect and PayPal workflows including webhooks, idempotency, and reconciliation jobs; optimized queries and introduced Redis caching to improve product catalog performance; collaborated with frontend (React) to define OpenAPI specs; implemented CI/CD with GitHub Actions and deployed to AWS ECS.

Built and maintained enterprise backend services supporting utility payments and subscription management for millions of end users; created SOAP and REST APIs for third-party integrations with retry policies, circuit breakers, and comprehensive logging; refactored legacy VB.NET modules to .NET Core, improving testability and reducing technical debt; designed SQL Server schemas for transaction logging and billing; participated in 24/7 on-call rotation and post-incident reviews.