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DL-BLD-06 · Build / SaaS

Marketplace SaaS development

A SaaS product for sellers or agencies, from the first version to a public app listing: multi-tenant architecture, seller authorization and the marketplace API work underneath (Amazon SP-API, Walmart and others), built and maintained by one team.

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51.4344.0060°03BUILDDETAIL 03 · BUILD · DL-BLD-06

Where marketplace SaaS development stalls

  1. 1.

    The prototype works for one account, not for hundreds

  2. 2.

    Seller authorization and token storage done unsafely

  3. 3.

    Developer profile or app listing stuck in a marketplace's review

  4. 4.

    Every marketplace API change lands on a team of one

Seller accounts and agency users sign in to one SaaS platform, which authorizes each tenant with the marketplace (Login with Amazon, Walmart Solution Provider), calls the marketplace APIs per tenant and is published as a public app.sign upauthorizecallslistingSELLER ACCOUNTSmany tenantsAGENCY USERSclient accountsSAAS PLATFORMtenants / jobsSELLER AUTHLWA / Walmart OAuthMARKETPLACE APISlimits per tenantPUBLIC APPmarketplace listing
  1. 01SELLER ACCOUNTSmany tenantsSAAS PLATFORMtenants / jobssign up
  2. 02AGENCY USERSclient accountsSAAS PLATFORMtenants / jobs
  3. 03SAAS PLATFORMtenants / jobsSELLER AUTHLWA / Walmart OAuthauthorize
  4. 04SAAS PLATFORMtenants / jobsMARKETPLACE APISlimits per tenantcalls
  5. 05SAAS PLATFORMtenants / jobsPUBLIC APPmarketplace listinglisting
Fig. 01Multi-tenant SaaS on marketplace APIsSeller accounts and agency users sign in to one SaaS platform, which authorizes each tenant with the marketplace (Login with Amazon, Walmart Solution Provider), calls the marketplace APIs per tenant and is published as a public app.Scale NTS

What the engagement covers.

  1. 01

    Product scoping

    Workshops that turn an idea into a first version worth shipping.

  2. 02

    Multi-tenant architecture

    Tenants, roles, jobs and rate limits designed for hundreds of accounts.

  3. 03

    Seller authorization

    Seller authorization (Login with Amazon, Walmart Solution Provider OAuth) and token storage done safely.

  4. 04

    Appstore publishing

    Developer profiles, public listings and marketplace reviews prepared and handled.

  5. 05

    Maintenance

    Marketplace API changes absorbed, so your team can work on the product.

How it runs.

  1. P01

    Workshop

    Users, features and constraints agreed before code.

  2. P02

    Estimate

    Scope, timeline and cost in writing.

  3. P03

    Build

    Iterative releases with a dedicated project manager.

  4. P04

    Launch

    Production, onboarding and the public listing.

  5. P05

    Maintain

    New features, new channels and API changes, as the product grows.

What you get.

ItemDeliverableQty

  1. 01Production SaaS with multi-tenant marketplace integrations1
  2. 02Public Appstore listing, if in scope1
  3. 03Source code and infrastructure owned by you1
  4. 04Maintenance plan1

Stack09

  • Amazon SP-API
  • Amazon Ads API
  • Login with Amazon
  • Walmart Marketplace API
  • Next.js
  • Node.js
  • TypeScript
  • PostgreSQL
  • AWS

Related projects.

  1. DL-003Acorn: SaaS for Amazon sellersGreenwald Brands · USA03Build
  2. DL-008Custom software for tracking prices and BuyBox winnersBolt About · USA03Build
  3. DL-004Automated monitoring system for an Amazon agencyeGrowth Partners · USA03Build
  4. DL-020Amazon data platform for an advertising agencyName withheld · Germany03Build02Stabilize
  5. DL-043Amazon and Walmart API architecture review for an eCommerce SaaSName withheld · Singapore01Audit02Stabilize
  6. DL-028Underwriting-grade Amazon financials for a revenue-based lenderName withheld · US South03Build
All case studies

Questions engineers ask us.

Q01We have an idea but not the full feature list. Can you help?

Yes. We run workshops of 16 to 80 hours to define the product before anything is built.

Q02Can you publish our app in Amazon's Appstore?

Yes. We prepare the developer profile, the listing and the review, and build what Amazon checks: authorization, data handling and restricted-data controls if you need PII.

Q03Can you join an existing SaaS team?

Yes. We build alongside your engineers or take over the marketplace side of the product.

Q04Who owns the product?

You do: source code, infrastructure and accounts.

Related services.

Scope your product

Tell us who the users are and what the product must do. We reply with a concept, an estimate and a timeline.

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