Senior Full-Stack Engineer (AI Media Platform)

Core Requirements Senior Full-Stack Web Development — TypeScript, Node.js, React, Vite, Express, Drizzle, SQLite/Postgres Multi-tenant SaaS Architecture — Authentication (OAuth/JWT), user/workspace namespacing, row-level security, database migrations (SQLite → Postgres) Payments & Billing — Stripe integration, subscription management, webhooks, credit systems, and usage-based metering GPU Infrastructure & ML Ops — Experience with RunPod, Modal, Replicate, or Kubernetes + bare-metal GPU setups; job queuing, autoscaling, cold-start optimization, retry logic ComfyUI Expertise — Workflow JSON manipulation (node-level editing), custom node management, model handling, and advanced pipeline configuration Media Storage & Delivery — S3/R2-compatible storage, CDN (CloudFront, Bunny.net, etc.), signed URLs, and retention policies Video Processing Pipeline — FFmpeg for trimming, transcoding, HLS/DASH streaming, thumbnail generation, and watermarking Frontend Product Development — shadcn/ui, Tailwind CSS, iframe/micro-frontend/embedded widget patterns Content Safety & Moderation — Age verification, content classification, harmful content detection, and takedown workflows DevOps — Docker, GitHub Actions, monitoring (Sentry/Datadog), secrets management, and backup strategies Nice-to-Have Python experience (ComfyUI custom nodes, FastAPI services) Deep knowledge of VAE / U-Net architectures and custom diffusion pipelines React Native for mobile apps Ad-tech or ad-server integration experience Background with high-scale media generation platforms