Developer Engineer

Black Forest Labs

We're the team behind Latent Diffusion, Stable Diffusion, and FLUX—foundational technologies that changed how the world creates images and video. We're creating the generative models that power how people make images and video—tools used by millions of creators, developers, and businesses worldwide. Our FLUX models are among the most advanced in the world, and we're just getting started.

Headquartered in Freiburg, Germany with a growing presence in San Francisco, we're scaling fast while staying true to what makes us different: research excellence, open science, and building technology that expands human creativity.

FLUX is the model developers want. BFL still has to become the platform they choose. In 2026 that platform is judged by a single question, asked by both humans and the agents acting on their behalf: how fast can I go from idea to a production-shaped call, and how good does it feel along the way?

We're hiring one person to own that answer end-to-end. Not the SDK alone, not the dashboard alone, not the API alone — the whole developer experience, for both the humans building on BFL and the agents building on their behalf. You're the person on the team who breathes Dev Exp: spotting where the platform is friction for a developer or for an agent, deciding whether the fix lives in the API contract, the SDK, the console, the docs surface, the MCP server, or the onboarding flow — and then shipping it.

You sit inside product engineering. You work shoulder-to-shoulder with the API/platform eng team (think: designing the next API revision), with research as new capabilities land, and with Dev Rel. Your job is to make BFL the platform that wins on developer experience, the way Stripe won payments and Vercel won frontends.

• Own Dev Exp as a product surface — wherever the bottleneck is, that's where you ship next. One sprint that might be the API contract, the next it's the dashboard onboarding, the next it's an MCP server, the next it's a Python SDK abstraction

• Partner with platform engineering on API design before it ships, not after — bring the developer-and-agent perspective into the room when the contract is being decided

• Work with product engineering on the developer-facing surfaces of the dashboard — playground, API keys, usage, request inspectors, webhook debugging — bringing the Dev Exp lens to features the rest of the team is already shipping

• Make BFL the best visual AI platform for agents to use. Own the MCP server, skills, agent onboarding paths, and the machine-readable surfaces of the platform. Design the reference patterns and SDK primitives developers reach for when building agentic workflows on FLUX. Stress-test every API and SDK change against "would Claude / GPT / an autonomous agent get this right on the first try?"
  
  — and treat agents as a first-class user across the whole product (errors an LLM can recover from, capabilities discoverable without a human reading docs, audit trails that make sense when most of the traffic on an account isn't a person)

• Own the portfolio of entry points developers and agents reach for — SDKs (Python, Type Script, more on demand), MCP server, skills, OpenAPI / typed surfaces — and treat them as a portfolio, not a hierarchy. SDKs add composable workflows and sane defaults for async / polling / retries; MCP and skills make BFL trivially usable from any agent loop. Dev Rel and the Creative Technologist team partner on examples, content, and showcase work on top of these surfaces — you own the surfaces themselves.

• Partner with the Growth engineer and Product on the developer funnel — signup → first key → first call → first production call → repeat — and own the Dev Exp fixes for the cliffs they surface

• Be opinionated. Versioning, error formats, breaking change policy, idempotency, naming — you have takes and you can defend them. The bar is Stripe: an API and SDK so well-designed the docs almost feel unnecessary.

• 4+ years building software, with meaningful time on developer-facing products — SDKs, APIs, dashboards, consoles, platforms developers actually use

• Full-stack comfortable.…