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Build the seller and operator experience together

Multi-vendor Marketplace Development

Turn your marketplace model into working buyer, seller and administration journeys. BrownBag develops the catalogue, order and commercial workflows that let multiple vendors operate within one platform.

A developer working with application code on multiple screens

Build the seller and operator experience together

How we help

A marketplace needs more than a storefront with seller names. Catalogue ownership, order routing, commissions, returns and disputes all affect who can change a record, who owes an action and how the operator keeps control.

We define these operating rules before selecting the implementation approach. Buyer-facing pages and seller tools are developed alongside the administration process, giving your team a consistent way to manage the platform as participation grows.

Discuss this service →

The work, step by step

How the work is handled

  1. Define the marketplace rules

    Map seller onboarding, product approval and catalogue ownership. Establish the order-routing model, commission basis, fulfilment responsibilities and settlement requirements, including how cancellations, returns and disputes affect each party.

  2. Build the core journeys

    Implement the agreed buyer experience, seller workspace and operator controls. Connect product submissions, stock updates and order status changes so permissions and responsibilities remain visible throughout the transaction lifecycle.

  3. Pilot the operating scenarios

    Test a small set of sellers and representative orders across approval, fulfilment, refunds and administration. Document exception handling and reporting needs before widening seller access or adding further marketplace features.

Clear handover

What you receive

  • Marketplace operating model and role permissions
  • Seller onboarding and catalogue workflows
  • Buyer checkout and marketplace order routing
  • Commission, exception and pilot-validation records

Start the conversation

Prepare your brief

These details help us scope the work:

  • Marketplace category and seller model
  • Commission and fulfilment responsibilities
  • Payment, settlement and operational requirements
Build your service brief →

Your questions, answered

Can sellers manage their own products?

Yes. We define what sellers can create or edit and which changes require operator approval. Catalogue ownership and moderation rules are part of the initial operating model.

Are split payments included automatically?

Payment allocation is scoped around your commercial model and the selected provider. The marketplace requirements identify seller onboarding, commissions, refunds and settlement flows that need implementation.

Talk to BrownBag

Let’s find the right support
for your business.

Tell us what you sell, where you operate and what you need help with. We’ll work through the next steps with you.