Amazon SP-API Data Engineer

We are a US Amazon seller looking for an experienced Data Engineer to build an automated data pipeline using Amazon Selling Partner API (SP-API).
Our goal is to collect Amazon operational and sales data and integrate it into our analytics infrastructure for reporting and business analysis.
Project Scope
We need help setting up a stable and scalable data pipeline that will:
• Connect to Amazon SP-API
• Implement OAuth authentication (refresh token + access token flow)
• Implement AWS Signature V4 request signing
• Extract data from SP-API modules including:
Orders API
Reports API
Finances API
Inventory data (optional but preferred)
• Store data in PostgreSQL database
• Build automated scheduled data updates
• Prepare structured datasets for BI reporting
• Support integration with Power BI
Expected Deliverables
• Fully working SP-API integration
• Automated ETL pipeline
• Database schema and data storage structure
• Documentatio...