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# Staff Artificial Intelligence Engineer, Conversations

- **Company:** Block, Inc.
- **Location:** San Francisco, CA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Python (Programming Language), Machine Learning, Language Modeling, AI Infrastructure, Pytorch, Large Language Models, Deep Learning, Enterprise Integration, Machine Learning Operations
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25303_11eef719e1473acc6fe0536d8e1e61a0

## About the Role

You have…

 * 6+ years of experience with Machine Learning.
 * Experience with Large Language Models OR comparable Deep Learning experience.
 * Experience with PyTorch is strongly recommended.
 * Experience with Python. Openness to programming in Java.
 * A track record of designing and maintaining production-level machine learning systems.
 * A commitment to writing clean and maintainable code.
 * Interest in helping to shape the mission and roadmap of the team, and rallying others to join you.
 * Eagerness to share your own ideas, and openness to those of others.

## Description

Square Messages is a messaging platform for merchants to manage conversations with their customers across multiple channels (SMS, email, etc.). Situated within the Square ecosystem, Square Messages has integrations with various Square products that enrich messages with appointment bookings, receipts, invoices, coupons, marketing, and more., Messages is also home to Square Assistant - an AI-powered virtual assistant to help merchants serve their customers 24/7. Square Assistant responds to customers asking for help with their appointments, including cancellations, confirmations, and conversational rescheduling of appointments. For more nuanced customer requests, Square Assistant saves merchants time by utilizing an in-house large language model to suggest responses, as well as actions that integrate with the rest of the Square Ecosystem. In the year ahead, we plan to expand Square Assistant's capabilities in many ways, like personalizing responses for each merchant or deploying larger language models in production., * Play a key role in designing and developing novel conversational AI systems within Square.

 * Train and deploy state of the art language models.
 * Build and maintain AI infrastructure that handles millions of conversations.
 * Collaborate with product managers, designers, and the other engineering teams to design, iterate, and ship new product experiences.
 * Work cross-functionally with other Square teams to enhance the Messages platform integrations.
 * Ship cutting-edge AI to businesses that traditionally haven't had access to it.