US SaaS startups often pick Node.js as their backend because it handles many users at once, supports fast feature releases, and keeps server costs low. This blog shows how single-language (JavaScript) stacks reduce friction, while Node.js’s non-blocking I/O, clustering, queues, and rich tooling make scaling smoother. It also covers trade-offs like CPU-heavy tasks and maintenance, gives advice for running production safely, and explains how Node.js Development Services help startups build fast and reliable SaaS platforms.