Machine Learning Engineer

About GitHub: GitHub is the world’s leading platform for agentic software development — powered by Copilot to build, scale, and deliver secure software. Over 180 million developers, including more than 90% of the Fortune 100 companies, use GitHub to collaborate, and more than 77,000 organisations have adopted GitHub Copilot. Locations: In this role you can work from Remote, United States Overview: GitHub is changing the way the world builds software and we want you to help build and secure GitHub. We're looking for an experienced machine learning engineer to help design, build and deploy agentic solutions, and to conduct ad\-hoc analysis, as you help protect the home of all developers. You will be responsible for identifying new trends relating to safety, fraud and abuse on GitHub, building agentic solutions to detect this abuse at scale, identifying vulnerabilities in GitHub that lead to abuse and helping to measure the impact of our work to safeguard the platform. At GitHub, Safety and Integrity's mission is to ensure GitHub and our users' safety through fighting malware, spam and fraud, monitoring for fake accounts, countering inauthentic content, battling crypto mining, and other core areas. You will be involved in collaborations across teams within GitHub including with Copilot and setting the standard for effective and responsible use of AI for moderation and trust and safety purposes, ensuring fraud is countered, content is moderated, users are kept safe and the open\-source community can flourish. If you have a strong foundation in large language models, solid software engineering instincts, a working knowledge of online platform trust and safety issues, and an empathetic approach to collaborating with a diverse team from entry\-level associates to seasoned senior contributors, then this might be the gig for you. What We Value * Collaboration: We believe the best work is done together. * Empathy: We believe in putting people first. * Quality: We believe in setting the standard for excellence. * Positive Impact: We believe in making the world a better place through our work. * Shipping: We believe in creating things for the people using them. Responsibilities: * Design, build and deploy agentic solutions that leverage large language models to detect and prevent fraud, abuse, and security threats at scale — applying LLMs to problems such as content classification and multi\-step agentic investigation. * Build well\-engineered, production\-grade systems that run reliably against high\-volume event streams, making effective use of AI coding assistants to accelerate and improve your work. * Build and operate scalable ML systems on cloud platforms (such as Azure AI Foundry) for training, deploying, and serving models and agentic solutions in production. * Evaluate and improve existing models and agentic solutions using offline evaluations (including tool\-use loops and LLM\-as\-judge evaluation), performance metrics,