Marketplace & E-Commerce

From product catalog to cart, from multi-vendor commission models to marketplace integrations, we build every layer of e-commerce. We have real integration experience with platforms like Amazon SP-API.

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From product catalog to cart, from a single seller to a marketplace

E-commerce doesn't fit one mold: sometimes it's a storefront where you sell your own product (B2C), sometimes a portal where your dealers and suppliers place bulk orders (B2B), sometimes a marketplace where multiple sellers sell under one roof (P2P/marketplace). Each one runs its catalog, pricing and payment flow under different rules; picking the wrong mold either falls short or brings needless complexity.

What we know here didn't come from a desk: pulling orders via Amazon SP-API and syncing stock and price run inside the daily work of an e-commerce warehouse. From catalog to cart, from multi-vendor commission models to marketplace integration, we build each layer on that experience — because that's where we saw which mold breaks where.

B2B, B2C and P2P — each builds a different architecture
Amazon SP-API integration in real operation
Warehouse, picking and dispatch run from the same core
One stock, one price — a truth independent of channel

Why build this with us

Real integration experience

Running a marketplace API like Amazon SP-API in real operation is a different thing from reading its documentation — we've seen surprises like rate limits, webhook delays and schema changes in the field.

Amazon SP-API running in production

The single-stock-pool principle

Store, your own site and marketplace update the same inventory at the same time; overselling and the 'out of stock' surprise end here.

Architectural protection against overselling

Modular adapter architecture

Adding a new marketplace or payment provider means writing an adapter without touching the core; complexity doesn't compound as integrations grow.

New marketplace = new adapter

A central hub post studded with sockets, several already filled with differently keyed plugs whose cables run off to separate stalls; a figure pushes one new plug into a free socket and none of the existing cables are touched

A layered, scalable architecture

All of our sector products stand on the same layered architecture (service/bll/dal); as your catalog grows, the thing that grows is the infrastructure, not the system's complexity.

The same layered architecture, repeated in every product

A stepped platform of three tiers; a crane adds another load onto the topmost tier while the lower tiers stand completely unchanged, their supports visibly thicker than the load requires

A gated sluice set in a stone wall: a figure works the teal gate with a lever, buckets wait in line along the wall, and another holding a notched tally stick waits beside a full cart for his turn — The outside system sets the pace — it decides how many requests pass, and you queue for it.

5 requirements of a flawless marketplace

A single stock pool — the same number, whichever channel you look from

Reliable payment and commission/payout distribution

Sellers/suppliers must manage their own catalog from their own panel

The order → pick → dispatch flow must be traceable, error-free

Adding a new channel or marketplace should take days, not weeks

A giant riveted tank with a single teal level gauge on its side; taps around its base feed different market stalls, and as one figure fills a bucket every stall keeper is watching that same gauge — Stock sits in one tank — sell through any channel and the same gauge drops for everyone.

B2B, B2C and P2P — which one fits you

All three are e-commerce, but their catalog, pricing and user flow run on different rules.

B2B — dealer & supplier portal

Account-based bulk pricing, credit limits and an order-approval flow; a dealer self-serves their own order and stock view.

B2C — your own storefront

Product catalog, cart, payment and campaigns; the classic e-commerce flow where the end customer buys directly from you.

P2P — multi-vendor marketplace

Multiple sellers sell under one roof; commission, payouts, the seller panel and marketplace approval are managed centrally.

How we build a marketplace/e-commerce platform

Business model & scope

We clarify together which model — B2B, B2C or P2P — fits your need, along with commission and pricing rules.

Catalog & storefront

We build the product catalog, variant and stock model, and develop a fast storefront with Next.js.

Cart, payment & order flow

We build the flow from cart to payment, payment to order confirmation, with virtual POS/wallet integration.

Marketplace/seller integration

We bring marketplace connections like Amazon SP-API, or the seller panel, live as an independent adapter.

Launch & scaling

We test the catalog, payment flow and stock sync in a live environment before launch, then continue under SLA maintenance.

The marketplace connection, and the warehouse itself

Live marketplace integration via Amazon SP-API

Order pulling, stock and price sync, shipment notification and the returns flow all run through Amazon SP-API in real operation. The hard part wasn't writing the integration; it was learning to live with rate limits, webhook delays and a schema that changes without notice.

Amazon SP-API order pulling
Two-way stock/price sync
Shipment notification & returns flow

A hatch set into a wall with a chute curving down into it; orders drop in from outside through the chute, the figure at the hatch stamps each one as it lands and sends a small tag back up the same chute, and the wall has no other opening

Warehouse, picking and dispatch

The side we built for e-commerce warehouses produces shelf-location-based pick lists, verifies every item by barcode and hands off to dispatch. A picker never walks to the same shelf twice — the system sets the order of the route.

Shelf-location-based pick lists
Barcode verification
The picking route comes from the system

A tall warehouse aisle: a figure follows the marked path on the floor pulling a cart and lifts one item from a shelf, while at the end of the aisle a second figure presses each item against a reader plate before it is allowed into the shipping box — Picking isn't wandering the aisles — the path is set, and every item is checked once before it's boxed.

The technology we build on

Backend

.NET 9
PostgreSQL

Marketplace

Amazon SP-API

Payments

Virtual POS
wallet

Storefront

Next.js
Angular

Live marketplace integration (Amazon SP-API)

One

One shared, layered core

Layered

service / bll / dal architecture

.NET 9

Modern core stack

Let's find which e-commerce model fits you

We'll listen to your business model and sales channels and map out where to start, together. The first conversation is non-binding.