Built for concurrent spike traffic. Hundreds of users hitting a single endpoint simultaneously on result announcement day. NGINX cache locking, per-IP rate limiting, keepalive tuning. Zero downtime, sub-second response times throughout.

Microservices backend with independent FastAPI services, service-to-service JWT validation, and Docker orchestration. Built for horizontal scaling with isolated failure domains per service.

Client-side JWE decryption with FastAPI backend. Sensitive payloads are never decrypted server-side. The private key stays in the browser, not on the server.