Would You Join a Company Using an Outdated Tech Stack?

Hey everyone, just for context, I’m a web developer with 6+ years of experience, mostly in agency settings, where I’ve built consumer-facing websites of all sizes. Lately, I’ve been looking to level up by joining a product-focused company since agency work has started to feel repetitive.

Recently, I interviewed with a small but successful local company. I was genuinely interested in their product and saw it as a potential opportunity to grow in my career.

But during the tech interview, when the lead developer walked me through their codebase… oh man, it was rough. The backend is a tangled mess of PHP with no structure—no MVC framework like Laravel, just pure spaghetti code. And on the front end (where I’d be working), they’re still using ExtJS, which feels like something from the dinosaur age. I was hoping to work with React or at least Vue.

So, my question is—would you join a company that relies on such an outdated tech stack in 2025?