Contact person: Sr. Back-end Developer (Python/Node.js/TS/GraphQL) - FT Freelance - Americas/Europe

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Location: Springfield, United States

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"Responsibilities
Architect and scale multi-source ingestion: build scrapers (Amazon, Walmart, Shein, Temu) + integrate with Shopify, WooCommerce, BigCommerce, Amazon SP-API, and direct merchant feeds.
Build data normalization + deduplication pipelines into a unified product graph.
Implement SkyPostal API integration (shipping labels, duties/taxes, customs manifests).
Develop payments integration with Stripe, BAC, Tasa Cero, Credomatic; handle FX and settlements to USD for merchants.
Build robust backend services (Node.js/TypeScript or Python) with job queues, retries, and error handling.
Implement secure session & credential management for merchant accounts and automation flows.
Requirements
6–8+ years backend engineering (Node.js/TypeScript + REST/GraphQL APIs).
Strong experience with web scraping (Puppeteer/Playwright/Selenium), proxy rotation, anti-bot evasion.
Familiarity with payment gateways and logistics APIs.
Cloud-native architecture (AWS/GCP/Azure), Docker/Kubernetes, observability tools.
Experience building high-volume e-commerce or logistics platforms a plus.
Nice to have technologies
Azure
Selenium
Web Scraping
Cloud
Payment gateway
Stripe
E-commerce
Docker
Google Cloud Platform
Kubernetes
Puppeteer
Playwright
AWS" (client-provided description)