Show HN: CoderScreen, an open-source alternative to CoderPad and HackerRank

CoderScreen is a collaborative code interview platform that enables real-time technical assessments with live code execution, multi-language support, and seamless candidate experience.

CoderScreen is available to self-host on Cloudflare. See our quick start guide for more details.

We use a combination of React, TypeScript, Cloudflare Workers, PostgreSQL, Drizzle (ORM), TailwindCSS throughout this pnpm powered monorepo.

• web: A React web app with TanStack Router.
• api: A Cloudflare Workers API with Hono.js.
• marketing: A Next.js marketing site.

• ui: A React Shared component library.
• db: A Drizzle ORM Shared database library.
• common: Shared utilities and types.
• sandbox-sdk: Code execution SDK for the sandbox environment. Fork of cloudflare's sandbox-sdk package.