Ecommerce & Marketplace Analytics
Amazon Vendor/Seller Analytics Dashboard
Custom marketplace analytics dashboard built around recurring vendor/seller reports, email ingestion, MySQL storage, and a Next.js reporting UI.
Marketplace Seller · Solo · Selected work
My role & contribution
Engineering work for this individual freelance engagement.
The problem
Built a marketplace reporting system for recurring vendor/seller reports that were otherwise handled through manual files and email workflows. Python ingestion scripts collected and loaded reports into MySQL, while a Next.js dashboard exposed authenticated reporting views, filters, tables, charts, and export workflows.

System flow
01
Report capture
Recurring marketplace reports and email-delivered files are collected through Python/Gmail workflows.
02
Storage layer
Parsed report rows land in a MySQL reporting schema designed around dashboard queries.
03
Reporting app
A Next.js dashboard reads the reporting tables for authenticated filters, grids, charts, and exports.
04
Validation
Report periods, source totals, and dashboard totals are checked before stakeholders use the views.
Difficult problems
- Marketplace reports arrived through recurring files and email workflows rather than one clean API
- Report formats and periods could drift from the dashboard schema
- Dashboard totals needed to be validated against source report totals
- The client needed a custom interface beyond spreadsheets or generic BI
Work contributed
- Built report ingestion into a MySQL reporting layer
- Created authenticated dashboard views with filters, grids, charts, and exports
- Separated ingestion, database validation, and UI reporting concerns
- Documented the reporting workflow so the system could be maintained after handoff
Supported outcome
- Built report ingestion into a MySQL reporting layer
- Created authenticated dashboard views with filters, grids, charts, and exports
- Separated ingestion, database validation, and UI reporting concerns
- Documented the reporting workflow so the system could be maintained after handoff
Technologies in context
Next.js · Python · MySQL · Gmail API · pandas · AG Grid · Recharts · NextAuth · CSV Export
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