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Senior Machine Learning Engineer, AI Personalization

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Block

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Location:
United States , Bay Area, CA

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

194500.00 - 343100.00 USD / Year
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Job Description:

Block builds simple, powerful tools that make progress towards an economy that's truly open to all. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Join us.

Job Responsibility:

  • 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 that stick, make broader design decisions and set an example for others to follow
  • Collaborate with a cross functional team of designers, business partners, and software engineers to build new technologies and features
  • Design experiments, test them on production users, analyze and repeat

Requirements:

  • 10+ years building and operating quality software
  • Domain expertise in recommender systems, ranking systems, or similar with 5+ years of experience
  • Led the development of complex models trained on large datasets powering customer facing features
  • Strong software engineering skills
  • Strong communication skills and customer empathy
  • Experience with PyTorch, PySpark, Databricks and AWS is a plus

Nice to have:

Experience with PyTorch, PySpark, Databricks and AWS is a plus

What we offer:
  • Remote work
  • medical insurance
  • flexible time off
  • retirement savings plans
  • modern family planning

Additional Information:

Job Posted:
May 03, 2026

Employment Type:
Fulltime
Work Type:
Remote work
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