At Hugging Face, we’re on a journey to democratize good AI. We are building the fastest growing platform for AI builders with over 5 million users & 100k organizations who collectively shared over 1M models, 300k datasets & 300k apps. Our open-source libraries have more than 400k+ stars on Github.
About the Role
In the past year the focus of building LLMs has gradually shifted from pretraining to post-training. This means spending more and more time on figuring out how to get models follow instructions reliably, use tools and generally align with certain values. With over 10k Github stars and close to 1M monthly installs the TRL library has become one of the go-to libraries for post-training. It scales flexibly from a single GPU to large clusters of GPUs using PEFT and ZeRO and offers a wide range of trainers for the latest post training techniques such as PPO or DPO and many more. In addition it includes a user friendly CLI that allows training models with a single command.
During this internship, you will collaborate with the research team to integrate cutting-edge methods into the library, maintain a clean and scalable codebase, and ensure its usability through thoughtful documentation. You’ll actively engage with the TRL community by responding to issues, gathering feedback, and fostering collaboration through thoughtful discussions and support, ensuring the library continues to meet developers' needs. Your contributions will directly influence thousands of developers globally, advancing the adoption of state-of-the-art post-training techniques and laying the groundwork for the next generation of customizable, instruction-following LLMs.
About You
We are looking for someone with knowledge and experience in some of the following areas:
You’re passionate about open-source innovation and making advanced ML tools accessible globally. You value continuity in software development, ensuring users have a dependable and evolving library to rely on.
Even if you don’t check every box, we encourage you to apply—we value diverse skills, perspectives, and experiences that complement our mission.
More about Hugging Face
We are actively working to build a culture that values diversity, equity, and inclusivity. We are intentionally building a workplace where people feel respected and supported—regardless of who you are or where you come from. We believe this is foundational to building a great company and community. Hugging Face is an equal opportunity employer and we do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
We value development. You will work with some of the smartest people in our industry. We are an organization that has a bias for impact and is always challenging ourselves to continuously grow. We provide all employees with reimbursement for relevant conferences, training, and education.
We care about your well-being. We offer flexible working hours and remote options. We support our employees wherever they are. While we have office spaces around the world, especially in the US, Canada, and Europe, we're very distributed and all remote employees have the opportunity to visit our offices. If needed, we'll also outfit your workstation to ensure you succeed.
We support the community. We believe significant scientific advancements are the result of collaboration across the field. Join a community supporting the ML/AI community.
Please provide a cover letter mentioning why you would like to work in open-source at Hugging Face. We encourage you to mention your skills, potential expertise, and topics on which you would like to work.
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If you're looking to kickstart your career in AI, the Machine Learning Engineer Internship at Hugging Face might be just what you need! Hugging Face is on a mission to democratize good AI and has built an amazing platform that caters to over 5 million users and 100,000 organizations. With a strong focus on post-training methods for LLMs and a booming TRL library, you’ll be joining an innovative team that values collaboration and creativity. As an intern, you will work closely with the research team to integrate cutting-edge methods into the TRL library, which is already a favorite among developers around the globe. You don't need to check every box to apply; whether you're skilled in fine-tuning models or have experience in GitHub workflows, we want diverse skills! This role offers the chance to engage with a vibrant community, respond to developers' queries, and maintain a clean, scalable codebase. Whether it's through blog posts or updates on platforms like LinkedIn, you'll help make complex ML concepts accessible while contributing to projects that influence thousands. Plus, Hugging Face prioritizes your growth, offering flexible hours and the opportunity to work remotely. So, if you’re passionate about open-source and want to make a real impact in the AI community, this internship could be your gateway to an exciting future in machine learning!
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