Headless multi-vendor marketplace on Magento 2
We built a headless Magento 2 marketplace with 10 custom modules and a GraphQL API, giving the client clear control over vendors, products, assisted ordering, and reporting.
Headless Magento 2 marketplace
10 custom modules + GraphQL API
Vendor-scoped control without core forks
The brief / challenge
The client needed one marketplace that could support many vendors, give each vendor safe self-service, and keep products under central control.
Diagnostic Symptoms
- Single-SKU products needed multiple vendor offers without duplicating catalogue entities
- Vendor teams needed self-service tools with staff accounts and clear permissions
- Sign-in needed flexible OTP and two-factor options to meet business and compliance needs
- Operations required in-store POS, click & collect, and vendor communications in one delivery surface
Structural Root Causes
- Conventional catalogue modelling made vendor offer management brittle and difficult to scale
- Marketplace work was spread across several tools without one clear control point
- Standard extensions could not provide the GraphQL support the storefront and apps needed
Project Evidence
Section visuals and proof coverage
How the platform connects
Magento marketplace overview
Generated UI treatment
Multi-vendor marketplace architecture connecting Magento, GraphQL, PWA, vendor dashboard, POS and OOB apps
Planned file: marketplace-operating-system-hero.webp
Build quality / performance
GraphQL and Lighthouse performance evidence
Generated UI treatment
GraphQL response time improvement from 6391 milliseconds to approximately 247 milliseconds
Planned file: graphql-speed-improvement.webp
Vendor tools
Vendor dashboard and day-to-day tools
Generated UI treatment
Vendor dashboard showing marketplace orders, offers, analytics and operational cards
Planned file: vendor-dashboard-overview.webp
Security and access
Role-based vendor security model
Generated UI treatment
Role-based vendor permissions and secure marketplace access controls
Planned file: vendor-permissions-security.webp
Omnichannel journey / PWA and POS
PWA mobile + assisted commerce flow
Generated UI treatment
Mobile PWA storefront with location-aware product discovery and marketplace offers
Planned file: marketplace-pwa-mobile.webp
“The platform moved us from disconnected processes to one marketplace we can control and extend as the business grows.”
Marketplace project stakeholder
Confidential client team
What we changed and built
Model the marketplace around offers, not product duplication
Used one shared product with offers from multiple vendors, keeping product information consistent while vendors competed on price and availability.
Deliver modular Magento 2 extensions with clear boundaries
Built ten custom modules to separate concerns across auth, vendor management, trading packages, analytics, communications, and POS.
Connect the storefront and apps through GraphQL
Created GraphQL-first contracts for vendor operations, marketplace data, and checkout-adjacent interactions across headless surfaces.
Protect data with clear access and security controls
Applied configurable OTP/2FA and role-based subaccounts with vendor-scoped isolation to keep autonomy and control balanced.
Before
Marketplace work was spread across disconnected tools, vendors had limited self-service, and product rules were difficult to change.
After
One headless Magento marketplace with a GraphQL API, clear controls, safe vendor self-service, and easier future updates.
Playbook Checklist
Key Outcomes
ValidatedThe solution surface
- Vendor self-service with access limited to the right data and tools
- Vendor staff accounts with permissions for each role
- Configurable OTP and multi-provider 2FA authentication model
- One shared product with offers from multiple vendors
- Location-aware vendor coverage resolution for offer eligibility
- Vendor analytics, trading packages, and communication tooling
- Public vendor profiles plus in-store POS and assisted ordering
How It Was Built
Build details that mattered
Modular Magento 2 implementation across ten custom modules to keep extension boundaries explicit and maintainable.
A GraphQL API connecting business features to the storefront and future apps.
Vendor data kept separate across accounts, products, and day-to-day tasks.
Marketplace logic engineered around offer composition and selection rather than product duplication.
Clear reference material for the project team
- A custom Magento marketplace without risky changes to Magento core.
- A practical balance between vendor self-service and central control.
- A build that supports today’s work and makes future features easier to add.
- Clear product rules, strong security, and useful day-to-day marketplace tools.
This work brings together our Magento services, marketplace support, and PWA storefront services for businesses that need a reliable platform they can keep improving.
Platform and screen references
Marketplace - sku offer
Proposed SKU-level offer model with multi-vendor composition, location-aware routing, and tiered pricing.
Vendor dashboard UI
Vendor self-service surface with subaccount permissions, offers, and communications tools.
POS & assisted ordering
In-store assisted order flow with click & collect and vendor context.
Analytics panels
Marketplace and vendor reports used for day-to-day decisions.
Platform Walkthrough
60–90 second demonstration covering offer selection, coverage resolution, vendor operations, and auth flows.
Easier marketplace growth.
The platform gave the business clear central control and made it easier to add new vendor features without moving to another ecommerce system.
Frequently Asked Questions
Answers for teams considering a custom multi-vendor Magento marketplace, headless storefront, and vendor self-service.
Related Delivery Paths
Explore related services for teams planning a multi-vendor catalogue, Magento rebuild, or PWA storefront.
Magento services
Custom modules, urgent rescue, speed improvements, and integrations.
Marketplace support
Vendor tools, Amazon and eBay connections, and product rules.
PWA storefronts
Fast, app-like storefronts connected to Magento.
Website design & delivery
Clear customer journeys for ecommerce sites and new launches.
Planning a complex marketplace build?
Talk to us about the users, connected systems, risks, and priorities before development starts.