A fast-growing Amazon seller needed a way to automate product listing uploads, reduce manual work, and eliminate listing errors. They required a secure, API-driven solution that could communicate directly with Amazon’s Selling Partner API (SP-API) and handle product data efficiently.

The client wanted:

A fully automated product upload workflow

Direct integrations with Amazon SP-API

A user-friendly backend to manage products

A reliable, maintainable API that ensures compliance with Amazon standards

I designed and developed the complete automation solution from architecture and API development to integration with the client’s existing backend.

API Development: Built a custom Node.js + Express API for product creation and submission.

Documentation: Integrated Swagger for clean, interactive API documentation.

Backend: Connected the API with a MySQL-based admin panel, enabling product management and queue handling.

SP-API Integration: Implemented secure authentication, feed creation, feed submission, and status tracking.

Error Automation: Automated validation and error-handling responses from Amazon.

One-click automated Amazon product uploads

Real-time submission tracking via SP-API

Secure OAuth/SP-API authentication

Integrated product validation

Scalable and reusable API structure

Challenge: Amazon SP-API’s complex feed structure and strict authentication Solution: Implemented modular Node.js services, added automatic token refresh, and built reusable functions for all feed operations.

Challenge: Syncing Node API with a MySQL backend Solution: Created a stable bridge using REST endpoints and ensured consistent data flow between systems.

80% reduction in manual listing time

Drastically fewer listing errors

Seamless, automated workflow across API and backend

Permanent technical asset the client can reuse for future Amazon operations

The client appreciated the smooth automation, clean architecture, easy-to-use API documentation, and the integrated backend control panel. They reported a significant improvement in productivity.