Senior/Staff Backend Engineer
Comfy Org
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Posted on Nov 6, 2025
Senior/Staff Backend Engineer
The Role
You’ll lead critical backend initiatives for the millions of creatives using ComfyUI, building systems that run millions of AI workflows. This means building rock solid distributed systems, designing data models that support explosive growth, and solving difficult scaling and optimization problems. You will make code changes across open source ComfyUI and Comfy Cloud. Our stack is Python, Go, Kubernetes, Redis, and Postgres on the backend, but we care way more about your ability to learn and ship than whether you've used these exact languages before.
You might be a good fit if
You enjoy having high levels of ownership to ship high quality features
You habitually invent novel solutions to solve hard problems
You've built a great product before, and care about the user experience as much as the engineering behind it
You have a strong understanding of distributed systems and have scaled large systems before
What you'll do
Work with a cross-functional team to quickly ship features, often going from idea to production in days not weeks
Ship features that directly impact millions of ComfyUI users
Help shape our technical direction as we grow
Sample Projects
Deploy ComfyUI’s diverse custom nodes written by the open source community in a secure and maintainable way
Write algorithms to schedule a diverse and heterogenous set of workflows on GPU nodes, optimizing for both latency and throughput
Build a notification system from scratch in one week
Nice to have
Are not afraid to deep dive into infrastructure (Kubernetes / Helm) to get things done
If you don't know every piece of our stack, that's fine - we care about your ability to learn fast and ship quality code. We're outpacing the industry by learning what we need to solve problems, not by sticking to what we already know.
Apply Now
About ComfyUI
The creative world is changing fast. Everything that used to be rendered is being generated by AI. ComfyUI is the world’s leading visual AI platform — an open, modular system to build AI workflows. It’s used by artists, filmmakers, video game creators, designers, researchers, VFX houses, and among others, teams at OpenAI, Netflix, Amazon Studios, Ubisoft, EA, and Tencent — all who want to go beyond presets and truly shape how AI creates.
Open-source, with over 100k Github Stars
An inference engine to run the most powerful open source models locally or in the cloud
ComfyUI has a massive community, with thousands of community-made nodes and integrations
Scales from creative experimentation to production automation
Evolving to democratize visual AI creation: empowering everyone from hobbyists to studios, storytellers, and enterprises to be more productive and creative than ever before
ComfyUI isn’t just another AI app. It is the operating system for visual generative AI, the foundation on which the next generation of creative tools are built.
A creative’s show case of how Comfy is used in their work:
About Us
We are a small, intense, and well-funded team in San Francisco who push ComfyUI and its ecosystem forward. Our team comes from Stability AI and Google and many contributed to the ComfyUI ecosystem way before working here.
Our team is very flat and talent dense. We love people with high agency and enjoy solving difficult problems and shipping code.
Q&A
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In-person vs remote?
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Why joining Comfy Org might not be for you?
This job is no longer accepting applications
See open jobs at Comfy Org.See open jobs similar to "Senior/Staff Backend Engineer" Essence VC.