Multi-channel e-commerce aggregators, 8-figure DTC brands, and 3PL warehouses selling simultaneously across Amazon, TikTok Shop, Shopify Plus, Walmart Marketplace, and Shopee/Tokopedia frequently search to hire a freelance Amazon SP-API, TikTok Shop API & multi-channel inventory programmer. I am Aldian Fazrihady, a Senior Freelance Full Stack Developer and Integration Architect available via Upwork.
Core Multi-Channel Marketplace API Capabilities
- Amazon Selling Partner API (SP-API) & AWS IAM SigV4: Automating FBA/FBM inventory feeds, order retrieval, settlement fee reconciliation, and Sponsored Products Ads reporting with strict leaky-bucket rate-limit handling.
- TikTok Shop, Shopee, Tokopedia & Lazada Open APIs: Synchronizing flash-sale stock buffers, shipping label generation, and return/refund state machines in real time.
- AI Review Analysis & Dynamic Pricing Copilots: Analyzing thousands of competitor reviews and Buy Box price fluctuations to recommend high-margin SKU adjustments.
Frequently Asked Questions
How do you prevent overselling stock across Amazon, TikTok Shop, and Shopify simultaneously?
I maintain a single source-of-truth PostgreSQL inventory ledger that reserves stock atomically on order webhook receipt and broadcasts safety-buffered available-to-promise (ATP) quantities to all connected channels within seconds.
How can we hire you for Amazon SP-API or multi-channel e-commerce engineering?
Contact me on Upwork.