The Vercel templates are really awesome. I used the AI Chatbot starter (https://vercel.com/templates/next.js/nextjs-ai-chatbot), and it just took me a few hours to build a GPT-4 powered initial screening chatbot tool for a job posting. It asks candidates a few behavioral questions and answers their questions about the role. I had to swap out the auth provider to Google, add a Postgres database for permanent storage, and write an initial prompt, but other than that - the fastest I ever built and deployed something useful.