Stop overengineering your SaaS MVP. Here's what actually ships.

Muhammad Tanveer Abbas — Thu, 07 May 2026 14:54:44 +0000

I've watched founders burn 6 months and $40,000 on "scalable architecture" for a product that had zero users.

I've also shipped 7 production SaaS products in 14 days each, with real users, real payments, and real infrastructure.

The difference isn't talent. It's decisions.

Here are the overengineering traps I see constantly — and what to do instead.

Trap 1: Separate microservices from day one

You don't have traffic. You don't have a team. You don't have a reason.

A monolith Next.js app handles everything you need until you have 10,000 daily active users and a concrete bottleneck. Split when you have a real, current problem — not a hypothetical future one.

Do this instead: One Next.js 16 app. Server Actions for mutations. API routes only for external webhooks.

Trap 2: Custom auth from scratch

Every week someone rebuilds JWT refresh logic, session management, and OAuth flows. This is a known problem with known solutions.

Supabase Auth handles email, OAuth (Google, GitHub, etc.), magic links, MFA, and session management. It's free. It's production-tested. Stop reinventing it.

One rule: use auth.getUser() server-side — not getSession(). getSession reads from a cookie that can be spoofed. getUser hits the Supabase server and actually verifies.

Trap 3: Building the billing system

Stripe exists. Use it.

Your job: create a price in Stripe, redirect to Stripe Checkout, handle the webhook, store the subscription status in your DB. That's it.

One non-negotiable: stripe.webhooks.constructEvent() to verify every webhook signature. If you skip this, anyone can POST fake payment confirmations to your endpoint.

Trap 4: Skipping analytics until "later"

Later means never.

PostHog takes 10 minutes to install. The free tier is generous. You get session recordings, event tracking, feature flags, and funnels.

Install it on day one. The data you don't collect from the first user is gone forever.

Trap 5: No input validation

Zod. Every server-side input. Before any DB write.

This isn't optional once you're in production. Malformed data gets in, silent bugs compound, and you spend a weekend writing a data migration.

The stack that actually ships

Next.js 16.2 — App Router, Server Actions, Turbopack
TypeScript 5.x strict mode — catches bugs before they go live
Supabase — auth + DB + storage in one service
Stripe — payments, subscriptions, webhooks
Tailwind CSS v4 + Shadcn/UI — production UI without fighting CSS
PostHog — analytics from day one
Sentry — error tracking before the first deploy
Vercel — deployment that just works
Zod — validate everything

I've used this stack to build 7 live SaaS products. All of them open source. Read the code:
→ github.com/MuhammadTanveerAbbas

If you're building an MVP right now, what's the thing slowing you down most?