n8n & Gemini API Expert Needed for News Workflow & Cost Optimization

We are looking for an experienced n8n Automation Expert with strong knowledge of Google Gemini API, prompt engineering, and AI workflow optimization. Our production news automation system processes hundreds of RSS news articles daily using n8n and the Gemini API. The workflow is already working correctly, but our Gemini API costs are higher than expected. We need an expert to optimize the entire workflow while maintaining the same output quality. Requirements 1. Cost Optimization : The workflow is working correctly, but our Gemini API costs are higher than expected. Optimizing and reducing Cost without reducing output quality 2. Display the Published Date & Time of each RSS article in the admin panel. 3. Add Time filters in the admin panel : Last 15/30 Minutes1/3/6 Hours/Today/Custom Date Range 4. Process Only Recent Articles : The workflow should only fetch and process RSS articles that were published within the last 15 minutes. Older articles should be skipped automatically to reduce unnecessary Gemini API calls, workflow executions, and operating costs.