E-commerce merchants selling across multiple major marketplaces needed a reliable way to automate listing dormancy during Shabbat and Jewish holidays without risking listing ranking or inventory sync errors.
• OBJECTIVEBuild a central scheduling platform that calculates accurate holiday zmanim (sundown times) by geolocation and automatically switches merchant listings to paused and active states across Amazon, Walmart, eBay, and Etsy.
Services used
Project Team
LEAD ENGINEER • DJANGO BACKEND DEVELOPER • MARKETPLACE API SPECIALIST • QA ENGINEER
Automated astronomical time calculation
Integrated high-precision astronomical algorithms to determine accurate local sundown and candle lighting times for every seller time zone.
Rate-limited resilient API dispatch
Engineered queuing systems with exponential backoff and rate-limit buffering for Amazon SP-API, Walmart Marketplace API, eBay Trading API, and Etsy API.
Core Automation Engine
Complete Operational Peace of Mind
Sellers completely eliminated manual weekly listing adjustments, preventing listing penalties and missed order fulfillments.

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