A full-featured crypto events calendar platform I built from the ground up. • Frontend: Developed with Next.js and Chakra UI, fully typed using OpenAPI Generator for strict client–server contract enforcement. • Backend: Powered by NestJS + PostgreSQL, with a fully documented Swagger API. Integrated multiple external services including CoinGecko, news APIs, and Telegram. • Infrastructure: Containerized with Docker, deployed via Kubernetes, using Nginx, Cloudflare Images, and streaming SSR for high performance. • Features include a Telegram bot, AI assistant for error feedback, user voting, and dynamic event feeds from crypto data sources.