Senior Machine Learning Engineer, AI Personalization

Responsibilities

• Lead strategic initiatives in AI Personalization, driving the vision, architecture, and execution
• Develop and deploy new AI/ML models that power search & recommendations in traditional UX as well as new agentic interfaces
• Deploy to production at scale to personalize every user’s experience
• Be a technical leader and establish quality practices, make broader design decisions, and set an example for others
• Collaborate with cross-functional teams of designers, business partners, and software engineers
• Design, test, and analyze experiments on production users

Requirements

• 10+ years building and operating quality software
• 5+ years of domain expertise in recommender systems, ranking systems, or similar
• Experience leading the development of complex models trained on large datasets for customer-facing features
• Strong software engineering skills
• Strong communication skills and customer empathy

Preferred Qualifications

• Experience with PyTorch, PySpark, Databricks, and AWS

About the Company

Block builds simple, powerful tools that make progress towards an economy that’s truly open to all. Our brands include Square, Cash App, Afterpay, TIDAL, Bitkey, and Proto.