You're building a login flow in Next.js 16, and you hit the question every auth tutorial glosses over: should the logged-in state live in a session or a JWT? Half the guides you find use one, half use the other, and almost none of them tell you why —...

You've probably seen a stray llms.txt link in someone's site footer, or noticed a new file sitting next to robots.txt and sitemap.xml on a docs site you visited. Maybe you've even been told "you need this or ChatGPT won't recommend your site." Before...

You just shipped a new billing page. It works perfectly in your local environment, QA gives it a thumbs up, and you deploy on a Friday afternoon bold choice. Twenty minutes later, support tickets start rolling in — the new checkout flow is broken for...

You've got a signup form. Email, password, maybe a checkbox for terms and conditions. Simple, right? Then someone submits email: 123 and your API route crashes with a cryptic error three files deep, because nothing ever checked that the data coming i...

You finally got Google Search Console wired uphttps://devstacked.tech/blog/google-search-console-setup-nextjs and Google is crawling your site properly. Great — now you have zero idea what any of those visitors actually do once they land. Which pages...

You're starting a new Next.js project, and before you write a single feature, you have to answer one boring but critical question: who's going to handle login? Two names keep showing up at the top of every list — Supabase Auth and Firebase Auth. Bot...

Ever shipped a Next.js app, then watched one bad API response take down the entire page — header, sidebar, footer, everything — just because one component threw an error? You're not alone. It's one of the most common "gotchas" for developers moving f...

Logging a user in is the easy part. The hard part shows up right after — when your "admin" and your "customer" both hit /dashboard and somehow need to see completely different things. Or worse, when a regular user figures out they can just type /admi...

You just shipped your Next.js site. Metadata's wired up, Open Graph tags look great, JSON-LD is in place — and yet Google has no idea your site exists. Weeks go by, you check your analytics, and organic traffic is basically zero. Here's the thing no...

If you've ever built a newsletter with Resend, you've probably hit this wall: everything works great for your first handful of subscribers, and then one day you're manually exporting a list from your CMS and pasting emails one by one because your "se...

You've built pages, you've built layouts, and now you need something that isn't a page at all — a webhook endpoint for Stripe, a JSON API for a mobile app, or a route that generates a CSV file on demand. None of that fits inside a page.tsx. That's ex...

If you've ever shipped a page with a 2.5MB hero image and watched your Lighthouse score crash to single digits, you already know why this matters. A slow, unoptimized image is one of the fastest ways to lose a visitor — most people won't wait more th...

If you followed our guide on integrating Stripe Payment Element with Next.js 16https://devstacked.tech/blog/stripe-payment-element-nextjs-16-guide, you already have a working checkout flow — a Payment Intent gets created, the user pays, and everyone'...

You can write the best blog post in your niche, ship a beautifully designed landing page, and still get zero organic traffic — because Google never properly crawled it, never understood what it was, or ranked a slower competitor above it instead. Tha...

You've built your Next.js app, it looks great, it works great — and then you share the link on Twitter or Slack and it shows up as a bare, ugly URL with no title, no image, nothing. Or worse, Google indexes your page with a title that just says "Home...

You share a link on Slack, and it shows up as a beautiful card with a title, description, and image. You share a link on X, and it shows up... as bare text. Same website, two totally different results. What's going on? The short answer: those previe...

Flat monthly pricing works great until it doesn't. If you're building an AI tool, an API product, or anything where one customer might use 10x more than another, charging everyone the same $29/month either underprices your power users or overprices y...

Every real app eventually needs to answer one question: who is this user? The moment you add a dashboard, a settings page, or anything that shouldn't be public, you need authentication — and rolling your own login system from scratch password hashing...

You've decided to accept payments on your app. Naturally, you reach for Stripe — everyone does. But then you notice the 2.9% + 30¢ fee, or you realize you're selling to customers in 40 countries and have no idea how sales tax works in each one, or yo...

Getting a file into S3 is only half the job. Sooner or later you need to actually show that image back to the user — on a profile page, in a gallery, inside a product card — and that's where a second wave of questions shows up. Do you just paste the ...