Senior Backend Engineer (Go + ComfyUI), creative AI product

We are a senior engineering team hiring a backend engineer for a long-term role inside a client's product team. The client is a product company with a large user base. We share its name only with engineers who pass our technical call.

Engineers there shape what gets built, not only how, and work directly with product people.

The product's image and video generation runs on ComfyUI workflows, so hands-on ComfyUI is a must for this role.

What matters most to us
You have built or run ComfyUI workflows yourself, with models deployed locally and custom nodes in the pipeline
You have built a product that people use every day, and you can point to the parts you owned
You think about the person using the product. You question a feature when it does not serve them and suggest a better one
Experience with creative, media or design products is a strong plus

What you will do
Build and run ComfyUI workflows for image and video generation
Build and scale the backend services around them in Go
Run background jobs reliably, with queues, retries and idempotent steps
Turn new models into features people actually use

You should have
Hands-on ComfyUI, at least on your own projects
3+ years of Go in production and 5+ years of backend work overall.
If you know ComfyUI well and work mostly in Python, apply anyway and tell us how fast you would pick up Go
Experience owning parts of a production system end to end
Fluent English for daily work with the client team

The role is full time, 40 hours a week, long term, with a working day that overlaps European business hours. Individual engineers only, no agencies.

How we hire: a call with our CTO about your ComfyUI work, your product work and your code, then a call with the client's team. Both are live, with screen share and without AI assistants.

To apply, open your application with a link to a ComfyUI workflow you built or ran, or one sentence on what it did. Applications without it will not be read.