Backend Developer (FastAPI/Python) for AI-driven Digital Document Processing + WooCommerce Integration

We are building a system that takes structured user input from a WordPress/WooCommerce store, uses AI APIs to generate personalized text + images, and delivers the result back to the customer as downloadable PDF/EPUB digital documents.

We need a backend developer to build the AI orchestration service + WooCommerce integration layer.

Scope of Work:

- Build a backend service (FastAPI or Node.js) with endpoints:

• /orders/start (trigger generation)

• /orders/{id}/status (progress check)

• Webhook to notify WooCommerce when files are ready

- Implement async job queue (Celery/Redis or equivalent) with retry/backoff.

- Integrate with AI APIs (LLMs for text + Image Models for illustrations).

- Export content to PDF (WeasyPrint/PrinceXML) and EPUB (ebooklib).

- Store results in S3-compatible storage (Cloudflare R2 or AWS S3) and return signed download URLs.

- Provide error handling, logging, and a basic admin dashboard for job monitoring.

- Ensure GDPR compliance (delete job data after defined retention period).

Deliverables:

- Dockerized backend repo with documented setup.

- Working integration with WooCommerce (test product + webhook).

- Example generated PDF/EPUB with placeholder text/images.

- Documentation (API, setup, deployment).

Timeline & Budget:

Expected timeline: 6–8 weeks.

Budget: This will be a fixed-price project with milestone payments.

Please provide your best fixed-price quote and a milestone breakdown.

Required Experience:

- Documented track record with AI API integrations:

• LLMs (OpenAI, Anthropic, Gemini, etc.)

• Image generation models (Stable Diffusion, Flux, Leonardo, etc.)

- Orchestration of AI pipelines (text → image → file export).

- File generation pipelines (PDF/EPUB).

- WooCommerce/WordPress API/webhook integration.

- Dockerized backend deployments.

Nice to Have:

- GDPR compliance experience (EU hosting).

- Prior work on digital publishing or content automation projects.