Deno 2.0 in Production: Six Months of Migration From Node.js and What Actually Changed

I resisted Deno for years. Partly stubbornness, mostly because the original pitch — "what if Node but without npm" — felt like solving the wrong problem when you have a working product and a team that knows the Node ecosystem cold. Then Deno 2.0 dropped in October 2024 with full npm compatibility, and one of my teammates (Priya, our resident runtime nerd) kept saying "no seriously, look at the tooling story." I gave in. We're a three-person backend team running a Node/TypeScript API that handles event processing for a SaaS product. Not huge — around 800 req/s peak, PostgreSQL backend, a handful of third-party integrations. The kind of service that's boring by design. I started the migration in September 2025 on a non-critical service as a proving ground, then moved one of our production APIs to Deno 2.2.x in January. Here's what I learned. What "Node.js Compatible" Means in Practice (It's Not Magic) The headline feature of Deno 2.0 was npm compatibility via the npm: specifier, and it w