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Greta.Agency

Vibe Coding for Marketplaces
Two-Sided Platforms Without a Full Engineering Team

Marketplaces are among the most complex products a non-technical founder can attempt to build with vibe coding. Two user types, separate sign-up flows, payment splitting, dispute handling, and search — each adds significant complexity. It is possible — but the scope discipline required is more demanding than for simpler products. Here is what works, what does not, and how to do it right.

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01

What vibe coding a marketplace actually involves

A marketplace has two user types — buyers and sellers — with distinct sign-up flows, different dashboards, and an interaction mechanism between them (listings, bookings, messages, or bids). It requires a payment infrastructure that splits funds between the platform and the seller (Stripe Connect). It needs a search and filtering system. It needs a review or rating mechanism. And it needs moderation tools for the platform operator. Each of these components can be vibe-coded individually. The challenge is that they must all work together — and the interactions between them create edge cases that are difficult to anticipate in prompts. A marketplace MVP should be defined as the minimum that enables one successful transaction between one buyer and one seller, not a full-featured platform.

Two user types (buyer/seller) with separate flows, dashboards, and permissions

Stripe Connect for payment splitting between platform and seller

Each component is vibe-codeable; the interactions between them require care

MVP definition: one successful transaction, not a full-featured platform

02

Why marketplace complexity is a vibe coding test

Marketplaces are the most ambitious type of vibe coding project because the complexity is multiplicative. Adding one new feature to a simple SaaS adds one unit of complexity. Adding one new feature to a marketplace can add five units — because it affects two user types, the payment flow, the notification system, and the admin panel simultaneously. The founders who succeed with vibe-coded marketplaces are the ones who accept a radically constrained MVP scope. They build the minimum to enable one transaction and validate demand before adding any of the features that make a marketplace comfortable to use. Validate first. Polish later.

Marketplace complexity is multiplicative — each new feature affects multiple systems

Successful vibe-coded marketplaces start with a radically constrained MVP scope

Validate one transaction type first — listing, booking, or purchase

Build fluency and discovery features only after the core transaction is validated

03

How to scope and build a marketplace MVP with vibe coding

The marketplace MVP build requires the most disciplined scoping of any vibe coding project. Follow this sequence:

Step 1 — Define the single transaction type: Service booking, physical goods purchase, or digital download

Step 2 — Build seller onboarding first: Seller creates a listing. That is all — no dashboard yet

Step 3 — Build buyer browsing and purchase: Buyer sees listings, selects one, pays via Stripe Checkout

Step 4 — Add Stripe Connect for seller payouts: Split the payment between platform fee and seller

Step 5 — Build the minimum notification flow: Email buyer (confirmation) and seller (new order) only

Step 6 — Test one complete transaction manually with a real buyer and seller before adding more features

Step 7 — Only after a successful real transaction: add search, filtering, reviews, and dashboards

04

Marketplace MVPs built with vibe coding

These are representative examples of what is achievable within a constrained scope.

A services marketplace was built using Bolt + Supabase + Stripe Connect in eight days — enabled 15 seller sign-ups and 40 bookings in the first month

A digital goods marketplace used Lovable with Supabase Storage for file delivery — validated demand with 30 sellers before building search or reviews

A local services platform built a complete booking and payment flow in 10 days — discovered the real bottleneck was seller supply, not buyer demand

Greta builds marketplace MVPs with proper Stripe Connect configuration, role-based access, and admin tooling in 10–14 days

05

Common marketplace vibe coding mistakes

Marketplace builds fail most often because of insufficient scope discipline — attempting to build a full-featured platform before validating the core transaction.

Building search and discovery before validating that sellers will list and buyers will purchase

Not implementing Stripe Connect from the start — adding payment splitting after launch is a complete rebuild

Building separate apps for buyer and seller instead of one app with role-based views

Skipping the admin panel — you cannot manage a marketplace without tools to moderate listings and handle disputes

No email notifications for transactions — buyers and sellers need confirmation emails from day one

06

How to build a marketplace MVP that validates

The minimum viable marketplace is the product that enables one successful transaction between a buyer and a seller, with payment split correctly, and confirmation emails sent to both. That is the target. Everything else — search, reviews, dashboards, recommendations — is iteration. Greta builds marketplace MVPs with this discipline: core transaction first, full code ownership, Stripe Connect configured from the start, and an admin panel that lets the operator manage both sides.

Define success as: one complete transaction, paid correctly, with emails to both parties

Build seller and buyer flows in the same application with role-based access — not separate apps

Implement Stripe Connect from day one — it cannot be added cleanly after the fact

Build admin tools alongside the product — you need to manage the marketplace from day one

Greta builds marketplace MVPs in 10–14 days with full code ownership and proper payment infrastructure

Building a marketplace and want it done properly?

Greta builds marketplace MVPs with Stripe Connect, role-based access, and admin tools. 10–14 days.