ComfyUI Engineer.

Runflow is hiring a ComfyUI Engineer to own the production workflows powering its AI image and video infrastructure. The role builds, optimizes, and maintains image-generation workflows, improves output quality and production performance, and trains or fine-tunes models and LoRAs.

Responsibilities:

• Build, optimise, and debug ComfyUI workflows for human-centric and product image generation
• Profile node chains. Cut VRAM, latency, and cost without sacrificing quality
• Wire workflows into Runflow's Solutions API, Python, TypeScript, REST
• Run batch inference and post-processing at production scale (millions/mo)
• Iterate on output quality. Hand off failure modes to Sentinel; learn from its scores
• Build dynamic conditioning systems, variable poses, styles, backgrounds, products
• Maintain a versioned, documented workflow repo other engineers can read
• Train and fine-tune checkpoints + LoRAs (Flux, SDXL, Wan-style pipelines)