AI E-commerce Analytics & Automation Platform

I am building an internal AI-assisted e-commerce analytics and automation platform.

The frontend will use Lovable/React, the backend/database Supabase/PostgreSQL, and n8n for automation and API workflows.

I am looking for a developer who can support me with selected technical integration tasks, including:

n8n workflows and automation architecture
Supabase / PostgreSQL
REST API integrations
Webhooks
OAuth2 authentication
JSON data handling
JavaScript / TypeScript
GitHub
Bonus experience:
Shopify API
TikTok Shop API
OpenAI API

I already have the UI designs, feature structure and business logic. I do not need the full product designed from scratch.

I am looking for a lean, fixed-budget collaboration based on clearly defined technical milestones. The collaboration will start with a small paid technical milestone. Further milestones will be awarded based on quality, communication and technical fit.
All work must be completed inside my own accounts and repositories. No hardcoded API keys or credentials. Short technical documentation is required for each completed milestone.

Important: The €200–400 project budget is for selected technical integration milestones, not for building the entire platform from scratch. I will build significant parts of the application myself using Lovable/React and AI-assisted development.

I mainly need an experienced developer for high-leverage technical tasks such as:

n8n / Supabase architecture
API integrations
OAuth / webhooks
error handling and retry logic
data ingestion / validation
technical reviews and debugging
Further milestones may follow if the collaboration works well.

When applying, please briefly answer these four questions:

What real projects have you built using both n8n and Supabase?

Which REST API, OAuth or webhook integrations have you implemented?

Are you comfortable working exclusively inside my GitHub, Supabase and n8n accounts?

Which part of this project would you be strongest at?

Please start your proposal with the words “N8N + SUPABASE” so I know you have read the full description.