Stop Using process.env Directly — Here's Why (opens in new tab)

Last month I pushed a new service to staging. Forgot to add REDIS_URL to the env file. The server started fine — no crash, no error — but the first request that tried to hit the cache hung forever. Took me 20 minutes and a strace to figure out the connection was silently failing. I've done this enough times now to recognize the pattern: environment variables in Node.js are just string | undefined. TypeScript can't help you. Validation is your job. Most teams do it wrong, or don't do it at all...