Most founders spend 6+ months building an imaginary product that users don't want. An MVP proves your core assumption in 4 weeks and costs 10x less. This guide walks through the exact process.
Week 1: Ruthless Prioritization
You have a list of 20 features you want to build. Only 3 matter for your MVP. Your job this week is identifying which 3. Start with your core assumption: "Founders will pay for a tool that..." If your assumption is wrong, everything else fails. Your MVP tests that assumption. Nothing more. For each feature, ask: (1) Does this test the core assumption? (2) Can users accomplish the core action without it? (3) Can we add it post-launch? If the answer to (2) or (3) is yes, cut it. You're not building a product; you're building a question mark and waiting for users to fill it in. Every feature you cut saves 1 week and $5K–$10K.
Week 2: Design and User Flows
Don't build anything yet. Design the user journey for each core feature. Use wireframes, not mockups—wireframes are fast and iterate quickly. Focus on the happy path. User logs in, does one thing, sees a result. Onboarding should be 3 screens, not 10. If you can't explain the flow in 30 seconds, it's too complex. Test your design with 5–10 potential users. Show them the wireframes and watch them try to use the product (without your help). Do they understand what to do? Do they get confused? Iteration is normal. You'll redesign 2–3 times. That's fine—design iteration is cheap. Code iteration is expensive.
Week 3: Build Core
You have one week to build. Not perfect, not beautiful—working. Here's what works: Start with one database table. Users sign up, create one thing, see it listed. That's it. Use a template if it exists. Don't build authentication from scratch—use Supabase Auth or Firebase. Don't build a file uploader—use Supabase Storage. Every tool you integrate saves 2–4 days of build time. Skip polish. Gray buttons are fine. Copy can be rough. Animations are not needed. Your goal is "functional," not "launch-ready." Deploy early (by day 3). You'll find bugs only when you deploy. Running locally hides problems. Vercel deployments are free and take minutes.
Week 4: Test and Iterate
You have 4–5 days. Invite 20–30 people to use your MVP. Watch them. Where do they get stuck? What do they ask about? What frustrates them? Take notes. Don't defend your design. If 5 people get stuck on the same step, that's a signal to change it. Prioritize feedback. Is it a core flow issue (people can't complete the main action)? Or a polish issue (button color, copy)? Core issues get fixed. Polish issues ship as-is. By end of week 4, you have a working product and real user feedback. Launch it. Put it in front of 100+ people. See if they sign up. See if they use it. See if they pay. If nobody cares, you've learned that in 4 weeks instead of 6 months. That's success.
The Tech Stack for Speed
Your choice of technology determines your speed. Here's what works: Next.js (frontend and serverless backend), Supabase (authentication + database + storage), Stripe (payments), Vercel (hosting). Why? Each tool is designed for speed. You can authenticate a user in 10 lines of code. You can have a database, query it, and display results in 30 lines. A full user signup flow takes 2 hours, not 2 days. Avoid tools that slow you down: custom authentication (build it yourself)—do not do this. Building your own form validation library—do not do this. Writing your own email service—do not do this. Use Resend for email. Use shadcn/ui for form components. Every line of code you don't write is a potential bug you don't have to fix.
Common Pitfalls to Avoid
Pitfall 1: Perfectionism. Your MVP doesn't need to be beautiful. It needs to ship. I've seen founders spend 2 weeks on button colors. Skip it. Pitfall 2: Premature scaling. You don't need a load balancer, caching layer, or auto-scaling infrastructure. 100 users run on Vercel's free tier. Scale when you have to, not before. Pitfall 3: Too many features. You'll be tempted to add one more thing, then another. Don't. Ship the minimum and let users tell you what's missing. Pitfall 4: No deployment plan. Deploy daily. Small failures are cheap. Deploying everything at the end and finding bugs is expensive. Pitfall 5: Forgetting to copy the URL. You built it—share it. Post in relevant communities, get feedback, find your first customers.