AI Prompt Engineer - Custom Avatar & Scene Generation Platform

I'm building a customisable gift platform where customers upload photos and automatically receive an avatar or cartoon version in a selected style (eg. 3D cartoon, Anime, Bitmoji, caricature, etc.) generated by Google Gemini 3 Pro. The output will be placed into product design templates and used for print on demand products. I am not looking for manual artwork. I need someone who can design, refine, and test AI prompts that generate consistent, high quality avatar styles automatically.

Overview of initial requirements:

• Avatar Google Gemini 3 Pro prompt templates for multiple styles: 3D cartoon (have, but needs refining), semi realistic, anime, caricature, and Bitmoji style.
• Full cartoon scene Google Gemini 3 Pro prompt templates for multiple styles: 3D cartoon, semi realistic, anime, caricature, Bitmoji style, and realistic illustration.
• Prompt to cope with variations for: single person, couple, family/friends (2–6 people),
• Themed variations: Birthday, Graduation, etc.
• Prompts must:
  • Maintain likeness
  • Consistent framing
  • Consistent styling
  • Outputs that fit within predefined design templates
  • Work across diverse faces, lighting, and poses
  • Produce clean backgrounds

Deliverables

• A set of prompt templates for each style + subject type
• Themed prompt variations
• Example outputs demonstrating consistency

What to include in your proposal

• Examples of AI generated avatar/cartoon styles you've created
• Your experience with Gemini or similar
• Brief overview of your approach to prompt engineering

Will be looking to do an initial paid test before completing the full initial scope. Potential for ongoing work as new styles and themes are added.