Machine Learning Engineer

Who you are

• 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
• 4+ years experience in machine learning, or related field
• OR Bachelor's Degree in Computer Science, Software Development, Electrical or Computer Engineering, Mathematical Sciences, or related field AND 2+ years experience in machine learning, or related field
• OR Master's Degree in Machine Learning, Computer Science, Software Development, Electrical or Computer Engineering, Mathematical Sciences, or related field
• OR equivalent experience
• Strong understanding of large language models — how they work — and hands-on experience applying them at scale, ideally for classification, agentic workflows, or agents
• Strong software engineering skills, including experience building with AI coding assistants
• Experience designing or evaluating agentic systems (tool-use loops, multi-step workflows, or LLM-as-judge evaluation)
• Hands-on experience building and operating classification or detection systems at scale, including handling imbalanced data and precision/recall tradeoffs
• Experience in Trust and Safety, National Security or fighting spam, malware, fraud, and threat actor activity at scale
• Experience in responsible AI
• Experience in Safety-by-Design
• Experience with managing user data and privacy
• Solid understanding of machine learning algorithms (supervised and unsupervised learning, anomaly detection, etc.) and their practical implementation

What the job involves

• 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
• 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, and feedback from operational deployments
• Identify vulnerabilities in products that lead to abuse, and provide consultation to product teams reviewing new features
• Collaborate closely with cross-functional teams including data scientists, software engineers, product managers and content moderators to integrate agentic solutions into production systems
• Document the systems you help build and support the technical growth of your peers

Benefits

• Flexible time away to support balance in your work and life
• Clear diversity, inclusion, and anti-discrimination policies backed by business practices and company culture
• 100% of medical, dental, and vision insurance premiums covered by GitHub for you + your dependents. (Includes gender-affirming benefits)
• Five months of paid family leave to all new parents with the option to use it all at once or throughout the child’s first year
• Family forming benefits that cover fertility, infertility, adoption, and surrogacy costs and support
• Mental health benefits that offer resources and support and cover therapy and coaching sessions for you and your dependents
• Generous 401(k) matching with 50% match up to the IRS 402(g) limit (US; competitive non-US pension options internationally)
• Employee stock purchase plan that lets you purchase Microsoft stock at a discount. (Microsoft is our parent company.)