Marketplace full-stack engineering is a specialisation. The payment escrow alone requires it.
We build full-stack marketplace applications — buyer and seller surfaces, Stripe Connect payment infrastructure, trust and safety systems, and the data models that support two-sided transaction businesses. Fixed scope, fixed price.
Marketplace businesses have double the surface area of single-sided products — every feature needs a buyer side and a seller side, and the payment layer needs to handle escrow, splits, and disputes correctly for both parties.
Marketplace products have a feature complexity multiplier that catches first-time marketplace builders off-guard. Every feature you plan for the buyer side has a corresponding feature on the seller side. Category search for buyers requires category management for sellers. Booking for buyers requires availability management for sellers. Reviews from buyers require seller response for sellers. The product backlog is inherently twice as long as a single-sided application.
The payment layer adds another layer of complexity. Stripe Connect — the standard infrastructure for marketplace payments — requires handling seller onboarding through Stripe's KYC process, platform fee deduction on every transaction, payout scheduling to connected accounts, refund attribution across the platform fee and seller portions, and dispute handling that correctly notifies and charges the responsible party. The developer who's done this once moves through it confidently; the developer doing it for the first time discovers the edge cases after launch.
Trust and safety is the third domain. A marketplace where buyers can't trust that sellers are legitimate, or sellers can't trust that buyers will pay, doesn't achieve liquidity regardless of how good the product experience is. Review integrity, ID verification, and dispute resolution need to be real and visible to both sides from early in the marketplace's life.
A complete full-stack marketplace — seller onboarding, listing management, buyer discovery and booking, Stripe Connect escrow, messaging, and reviews — built with the data model that scales as you add liquidity.
Seller onboarding and listing management
Seller registration with Stripe Connect account creation and identity verification. Listing creation with category-specific fields, pricing, availability, and photos. Listing editing and analytics (views, bookings, revenue per listing).
Buyer discovery, search, and booking
Search with category, location, price, and availability filters. Listing detail page with photos, reviews, seller profile, and availability calendar. Instant book or request-to-book flow. Stripe checkout with funds held in escrow.
Stripe Connect payment escrow and payouts
Platform fee configuration. Funds held until configurable release trigger. Automated seller payout to connected bank account. Refund handling with platform fee and seller payout reversal.
In-platform messaging
Pre-booking enquiry and post-booking communication between buyers and sellers. Notifications via email and in-app. Contact info protection — buyer and seller email/phone not shared through the platform until configurable trust trigger.
Reviews and trust infrastructure
Post-transaction review prompt for buyer and seller. Bi-directional review system — both parties review each other. Verified purchase badge (review only visible after confirmed transaction). Seller response to reviews. Identity verification badge for sellers who complete enhanced verification. Built on Next.js, Postgres, Stripe Connect, Cloudinary for listing photos, and real-time messaging via Convex or WebSocket.
One honest number to start.
Fixed-scope, fixed-price. The number below is the starting point — final scope is built from your brief.
A complete full-stack marketplace — seller onboarding, listing management, buyer discovery and booking, Stripe Connect escrow, messaging, and reviews — built with the data model that scales as you add liquidity.
Three steps, every time.
The same repeatable engagement on every project. No surprises, no mystery, no billable ambiguity.
Brief & discovery.
We send you questions, then get on a call. Output: a written scope with every step, feature, and integration listed.
Build & ship.
Fixed schedule, weekly reviews. No scope creep unless you change the scope — and if you do, we reprice it transparently.
Warranty & retainer.
30-day warranty on every launch. Most clients stay on a monthly retainer for ongoing features and maintenance.
Why Fixed-Price Matters Here
Marketplace founders are managing the supply-demand gap that determines whether the business achieves liquidity. Technology cost needs to be known and bounded so capital can be allocated to the supply-side and demand-side seeding activities that actually determine whether the marketplace succeeds. Fixed scope, fixed price.
Related engagements.
Questions, answered.
Stripe Connect supports connected accounts in most countries with local payout capabilities. The seller onboarding flow is localised for the required identity documents per country. Multi-currency payout capability depends on Stripe's country support. We scope the geographic coverage during discovery.
Instant book: buyer pays immediately and the booking is confirmed. Seller has no ability to decline after booking is made. Higher conversion for buyers; lower control for sellers. Request-to-book: buyer submits a booking request that the seller accepts or declines within a configurable window. Lower conversion but higher seller control. Most service marketplaces start with request-to-book.
The dispute workflow: buyer initiates a claim in the platform. The platform notifies the seller and requests response documentation. Both parties provide evidence. The platform makes a resolution decision (refund, partial refund, or no action). Resolution is logged against both user records.
Seller onboarding, listing management, buyer booking, Stripe Connect escrow, messaging, and reviews typically runs $50k–$100k. Mobile apps and complex matching algorithm add scope. Fixed-price.
14 to 20 weeks for a production two-sided marketplace with full payment infrastructure.
Tell Ryel about your project.
Describe what you’re building and what outcome you need. You’ll have a written, fixed-price scope within the week.