Senior Open-Source Python Engineer, ML Developer Tools - EMEA Remote

At Hugging Face, we're on a journey to democratize good AI. We are building the fastest growing platform for AI builders with over 11 million users who collectively shared over 4 million models, 1 million datasets & 1.5 million Gradio apps. Our open-source libraries have more than 700,000 stars on GitHub.

About the Role

Roles at Hugging Face are fluid and dynamic — we are looking for someone who is comfortable taking on different challenges that will evolve over time.

You'll join the Applications team, whose goal is to build the tooling that helps developers create machine learning applications on top of the primitives we offer on the Hub: Gradio, Spaces, Inference Providers, Datasets, Xet, and more. Concretely, that means maintaining and growing libraries like Trackio (a local-first, agent-friendly experiment tracking platform), FastRTC (our library for real-time audio and video streaming in Python), and Gradio itself.

A large part of this role is taking a project from its first users to widespread adoption: shaping the API, shipping fast, and getting it into developers' hands.

Key Responsibilities

• Design, develop, and maintain core features across the team's libraries, ensuring scalability, reliability, and ease of use for ML developers.
• Architect complex Python projects and frameworks that serve as foundational tools for the ML community.
• Grow early-stage libraries: define the API surface, write demos and documentation, and drive adoption in the developer community.
• Work on real-time streaming and networking capabilities, a core priority for Gradio 7 and beyond.
• Collaborate with open-source contributors and engage with the broader community through code reviews, discussions, and support.
• Integrate modern frontend technologies to create seamless and intuitive user experiences for Python-based web applications.
• Adapt to evolving engineering challenges and contribute to the direction of our developer tools as the landscape changes.

Requirements

• Bachelor's degree or equivalent experience in Computer Science or a related field.
• 5+ years of professional Python development experience.
• Proven experience architecting complex Python projects or frameworks.
• A track record of taking early-stage libraries or products from first users to broad adoption.
• Professional experience with JavaScript or TypeScript.
• Professional experience with a modern frontend framework such as React or Svelte.
• Experience as a core contributor to or maintainer of open-source software projects.

Nice to Have

• Experience with real-time audio/video streaming or networking (WebRTC, WebSockets).
• Contributions to open-source libraries such as Pipecat, LiveKit, FastAPI, or Starlette.

Special Application Note

At Hugging Face, we build for everyone, especially the GPU-poor. To confirm you read this job posting, please start your answer to the first application question with the words "GPU-poor and proud 🤗".

Culture & Benefits

• Equity: All employees receive company equity as part of their compensation package.
• Health & Well-being: Health, dental, and vision coverage for employees and dependents, plus parental leave and flexible paid time off.
• Development: Reimbursement for relevant conferences, training, and education.
• Work Setup: Flexible working hours, remote-first setup with workstation outfit support, and opportunities to visit offices in NYC and Paris.