Racheal User

I've built scalable backend systems and full-stack products across Xanadu Digital, FraudWatch360, G-Tateth CRM, Golivwell, and Listoglobal. My work spans Node.js services, React applications, RESTful APIs, distributed systems, and reliable production deployments.

At FraudWatch360, I architected a fraud-scanning API using NestJS, TypeScript, PostgreSQL, and TypeORM, integrating OpenAI, Google Safe Browsing, and Truecaller for threat analysis and risk scoring. I also delivered secure authentication, real-time notifications, Dockerized services, Redis rate limiting, and Prometheus/Grafana monitoring.

For G-Tateth CRM, I built multi-tenant messaging, workflow automation, subscription billing, analytics, and an AI-assisted chatbot builder. At Listoglobal, I helped create reusable full-stack components that reduced development time for new features by about 25%.

I take end-to-end ownership from requirements through monitoring, and I enjoy designing clean, scalable systems while mentoring teammates through code reviews, DDD, TDD, and clean architecture practices.