E-Commerce & Marketplace Development
We build platforms where two sides transact — buyers and sellers, customers and contractors, travellers and venues — including the payments, discovery, and trust mechanics in between.
What is marketplace development?
Marketplace development builds a platform where two distinct user groups transact — supply and demand — which makes it materially harder than a single-vendor online store. It requires separate onboarding for each side, discovery and matching, split payments, and trust mechanics such as reviews and dispute handling. Techroniqs has built these on Ruby on Rails, React, Next.js, Stripe, Google Maps, and Mapbox, including GreenPal, a US on-demand lawn-care marketplace connecting more than 500,000 homeowners with local contractors.
Key takeaways
- A marketplace is two products sharing a database. Supply and demand need separate onboarding, separate incentives, and often separate interfaces.
- Liquidity is the real problem, not software. The platform should be designed to work while one side is still thin.
- Location-based discovery is a database problem before it is a map problem — the map is the last 10%.
- Payments in a marketplace mean splitting funds between platform and provider, and handling refunds across both.
- If you have one supplier and many buyers, you want a store, not a marketplace — and a store is far less work.
Who this is for
- Founders building a two-sided platform in a category where transactions currently happen offline.
- Existing marketplaces hitting performance or conversion limits at scale.
- Businesses adding booking, scheduling, or location-based discovery to an existing commerce product.
What you get
Every engagement produces these. Anything else is scoped explicitly rather than assumed.
- Two-sided onboarding
- Separate sign-up, verification, and first-run experience for each side of the market.
- Discovery and matching
- Search, filtering, and location-based matching tuned to how users actually choose.
- Payments
- Stripe integration covering checkout, provider payouts, and refunds.
- Booking and scheduling
- Availability, reservations, and the conflict handling underneath them.
- Trust mechanics
- Reviews, ratings, and the moderation tooling to keep them meaningful.
- Operations tooling
- Internal screens for resolving disputes and managing both sides of the market.
Technology stack
Application
- Ruby on Rails
- Next.js
- React
- Redux Toolkit
Payments
- Stripe
Location
- Google Maps
- Mapbox
Data and platform
- PostgreSQL
- Redis
- AWS
- Vercel
Marketplace, storefront, or booking platform
These are often conflated in early conversations. They differ in who supplies the inventory, which changes almost every downstream decision.
| Model | Supply | Core difficulty | Example we built |
|---|---|---|---|
| Two-sided marketplace | Many independent providers | Liquidity and trust between strangers | GreenPal — 500,000+ homeowners |
| Single-vendor store | You | Merchandising and conversion | Standard e-commerce build |
| Booking platform | Venues or operators with time slots | Availability and conflict handling | Greenfinder — golf trip booking |
| B2B / B2C hybrid | Businesses and individuals together | Two pricing and tax models in one system | Edi-Mart — UK re-use marketplace |
How we build it
- Solve one side of the market first. A marketplace with strong supply and no demand is a directory; the reverse is a waiting list. Pick which you can seed.
- Make search work well before making it look good. Discovery quality drives conversion more than visual design in every marketplace we have worked on.
- Handle the refund path at the same time as the payment path. Marketplace refunds touch two parties and are far more involved than single-vendor returns.
- Design for a thin catalogue. Empty states are the normal state early on.
- Build the dispute tooling before you have disputes, because you will have them.
Common mistakes
Building both sides fully before launch
Twice the build for a platform with no liquidity on either side.
Instead: Seed one side manually, and build the other around real usage.
Treating payments as checkout only
Payouts, fees, and refunds get bolted on later, touching money in production.
Instead: Model the full flow of funds, including reversals, up front.
Map-first location features
A visually impressive map over a query that cannot filter by distance efficiently.
Instead: Get geospatial querying right, then put a map on it.
No moderation tooling
Trust erodes and the operations team has no way to intervene.
Instead: Ship review moderation and dispute handling with v1.
Typical timeline
Ranges reflect engagements we have delivered. Scope, integration count, and decision speed on your side move these more than anything else.
1. Model and scope
1–2 weeksTransaction model, flow of funds, and which side gets seeded first.
2. Core transaction path
4–8 weeksOne side can list, the other can find and pay.
3. Scale and trust
6–14 weeksDiscovery, reviews, disputes, and operations tooling.
4. Optimise
OngoingConversion, performance, and unit-economics work.
Where we have done this
GreenPal
Marketplace500K+ User Marketplace
US-wide on-demand lawn-care marketplace serving 500,000+ homeowners, connecting them with local contractors.
500,000+ homeowners served
Read the case studyEdi-Mart
E-CommerceSmart-EDi
B2B and B2C re-use marketplace platform with AI-powered product recommendations, location-based services, and integrated payments.
Read the case studyGreenfinder
MarketplaceGolf trip booking and discovery platform with map-based course finding and availability management.
Read the case studySmartED Mobile
E-CommerceEnterprise-grade mobile app for warehouse field workers to manage and track company assets across multiple warehouse locations with offline-first support.
Read the case studyWhen this is the wrong choice
Stated plainly, because finding this out in month three costs you far more than reading it now.
- We build the platform, not the liquidity. Marketplace success is mostly a supply-acquisition problem, and no amount of engineering substitutes for it.
- For a straightforward single-vendor store with standard products, Shopify will cost less and launch sooner than anything custom.
- We do not provide payment licensing or act as a money-services business; funds flow through Stripe or an equivalent provider.
What to consider instead
- Shopify or WooCommerce
- One vendor, standard products, no custom transaction logic.
- Marketplace SaaS (Sharetribe and similar)
- Validating a marketplace concept before committing to a build.
- Custom build
- The transaction model itself is unusual and off-the-shelf platforms cannot express it.
Frequently asked questions
What makes a marketplace harder to build than an online store?
A store has one supplier — you. A marketplace has many independent suppliers, which adds provider onboarding and verification, discovery and matching, split payments with payouts, reviews to establish trust between strangers, and dispute resolution. It is closer to two products sharing a database than to a store with extra features.
How do payments work in a marketplace?
Money moves from the buyer to the platform and then to the provider, minus a platform fee. Stripe handles the mechanics, but the design work is specifying what happens on refunds, cancellations, and disputes, since each of those has to unwind a payment that has already been split between two parties.
Should I use Shopify or build a custom platform?
Use Shopify if you are one vendor selling standard products — it will cost less and launch sooner, and a custom build would be hard to justify. Build custom when you have multiple independent sellers, an unusual transaction model, or logic that a hosted platform cannot express.
How do you handle location-based search?
It starts as a database problem: indexing coordinates so the platform can efficiently answer "providers within N miles, filtered and sorted". Google Maps or Mapbox then renders the result. We have built this on GreenPal, Edi-Mart, and Greenfinder, and getting the query layer right before the map is what keeps it fast as the catalogue grows.
Can you build a booking platform with availability?
Yes. Greenfinder is a golf trip booking platform with map-based course discovery and real-time availability. The difficult part is conflict handling — two users booking the same slot simultaneously — which needs to be solved in the data layer rather than the interface.
How long does a marketplace take to build?
A working transaction path where one side can list and the other can find and pay takes roughly four to eight weeks after a one to two week scoping phase. Discovery, reviews, disputes, and operations tooling extend that considerably, which is why we recommend launching on the transaction path and building trust mechanics against real usage.
Related
Talk to an engineer about e-commerce & marketplaces
A 30-minute call with someone who will be writing the code. We will tell you if we are the wrong fit, and what we would do instead.