Backend systems, full-stack products, and tools — things I've designed, built, and shipped.
An EHR platform supporting 12 core workflows, 25+ REST endpoints, RBAC, and PostgreSQL-backed patient records with a 15+ table relational schema via Prisma. Includes consent-based access control (grant, revoke, time-limit) with full audit logging and a Universal Health ID for portable records across providers.
A scalable ride-hailing backend built with a microservices architecture — secure JWT auth, trip booking workflows, and driver–passenger matching with real-time inter-service communication via message queues. Database indexing and query optimization cut API response time by 35%.
A system-level network filtering tool that blocks distracting websites using domain- and keyword-based rules across HTTP/HTTPS traffic. Built a local proxy server and DNS filter in Node.js to inspect requests and enforce rules in real time, with a REST API and CLI for ban/unban workflows and Windows proxy automation.