Backend Developer Needed for AI Video Editing SaaS (FFmpeg, Python/Node, AI Integration)

We are building an AI-powered video editing platform that allows users to generate fully edited videos by analyzing competitor content and applying similar editing styles automatically. We are building a scalable video processing system. We are looking for a skilled backend developer who can architect and implement a robust system for video processing, AI workflows, and rendering. PROJECT OVERVIEW: The platform allows users to: * Paste a competitor YouTube video link (for style analysis) * Upload raw video footage * Upload multiple avatar videos (with custom placement logic) * Select niche (finance, storytelling, documentary, etc.) * Generate a fully edited video automatically CORE RESPONSIBILITIES: You will be responsible for building the backend system that handles: 1. Video Processing Pipeline * Scene detection * Video cutting and sequencing * Transitions, zooms, and effects using FFmpeg 2. Style Analysis Engine * Analyze competitor video structure (cuts, pacing, captions) * Convert into reusable “style profiles” 3. Avatar Injection System * Insert avatar videos at: * Beginning (based on sentence trigger) * Middle (percentage-based) * Every X seconds * Custom sentence trigger * Side overlay (picture-in-picture) 4. AI Integration * Transcription (Whisper or similar) * Caption timing * Optional AI-based editing logic 5. Rendering System * Combine video, audio, captions, overlays * Export final video in different formats (16:9, 9:16) 6. Job Queue System * Handle long-running tasks (video rendering) * Status tracking (processing, completed, failed) TECH STACK (PREFERRED): * Backend: Python (FastAPI) OR Node.js * Video Processing: FFmpeg (VERY IMPORTANT) * AI: Whisper, OpenAI or similar APIs * Queue System: Redis + BullMQ / Celery * Storage: S3 / Backblaze / Cloud storage * Database: PostgreSQL / Supabase REQUIRED EXPERIENCE: * Strong experience with FFmpeg (non-negotiable) * Experience building video or media processing systems * Experience with background job queues * API development experience * Experience handling large file uploads and processing BONUS (NOT REQUIRED BUT A PLUS): * Experience with AI video tools * Experience with transcription and subtitle systems * Experience building SaaS products * Familiarity with n8n or workflow automation DELIVERABLES: * Fully functional backend API * Scalable video processing pipeline * Clean, documented code * Integration-ready endpoints for frontend (Lovable UI) HOW TO APPLY: Please include: 1. Links to past projects (especially video or media-related) 2. Brief explanation of your experience with FFmpeg 3. Your preferred stack (Python or Node.js) 4. How you would approach building a video rendering pipeline IMPORTANT: Only apply if you have real experience with video processing systems. This project requires more than standard backend development. We are building a serious product and looking for someone who can think architecturally, not just write code. We’re looking to start immediately.