Machine Learning Engineer

  • Redwood City, CA
  • Full-time
  • Alternate Location: New York, United States

Company Description

Since we first opened our doors in 2009, the world of commerce has evolved immensely – and so has Square. After enabling anyone to take a payment and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn’t work together. So we expanded into software and started building integrated, omnichannel solutions – to help sellers sell online, manage inventory, run a busy kitchen, book appointments, engage loyal buyers, and hire and pay staff. And across it all, we’ve embedded financial services tools at the point of sale, so merchants can access a business loan and manage their cash flow all in one place.

Today, we’re a partner to sellers of all sizes – large, enterprise-scale businesses with complex commerce operations, sellers just starting out, as well as merchants who began selling with Square and have grown larger over time. As our sellers scale, so do our solutions. We all grow together.

There is a massive opportunity in front of us. We’re building a business that is big, meaningful, and lasting. And we are helping sellers around the world do the same.

Job Description

The Conversations team at Square builds Square Assistant -- a virtual assistant to help merchants serve their customers. This can mean full automation of common tasks (e.g., booking and rescheduling appointments), but can also mean tools to make sellers more efficient and professional when messaging their customers. For example, suggesting polite and contextually relevant quick replies in response to a customer message. Looking to the future, the team is working to incorporate more skills into Assistant – e.g., order management and package tracking – and expanding our suggested replies to include suggested actions for the merchant to take in response to a customer message . The team itself was created in mid-2019 with the acquisition of Eloquent Labs.

We're looking for senior NLP engineers and research scientists, particularly those with an interest in dialog systems and large-scale language models. 


You will...

  • Play a key role in designing and developing novel dialog systems within Square, whether on the modeling side or the dialogue state management side.

  • Build AI systems that will handle millions of conversations

  • Collaborate with Backend, iOS, and web engineers to ship features.

  • Work cross collaboratively with product managers and designers to iterate on and define product scope and design.

  • Ship cutting-edge AI to businesses that traditionally haven’t had access to it

You have…

  • Experience in natural language processing and deep learning

  • Experience with Java (for the dialogue state manager) and Python (for our deep learning models)

  • Experience with PyTorch is strongly recommended

  • Interest in helping to shape the mission and roadmap of a new team, and rallying others to join you

  • Eagerness to share your own ideas, and openness to those of others

Additional Information

We’re working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, without regard to race, color, religion, gender, national origin, age, disability, veteran status, pregnancy, gender expression or identity, sexual orientation, citizenship, or any other legally protected class. 

We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we’re doing to build a workplace that is fair and square? Check out our I+D page

Additionally, we consider qualified applicants with criminal histories for employment on our team, assessing candidates in a manner consistent with the requirements of the San Francisco Fair Chance Ordinance.


We want you to be well and thrive. Our global benefits package includes:

  • Healthcare coverage
  • Retirement Plans
  • Employee Stock Purchase Program
  • Wellness perks
  • Paid parental leave
  • Paid time off
  • Learning and Development resources

Block, Inc. (NYSE: SQ) is a global technology company with a focus on financial services. Made up of Square, Cash App, Spiral, TIDAL, and TBD54566975, we build tools to help more people access the economy. Square helps sellers run and grow their businesses with its integrated ecosystem of commerce solutions, business software, and banking services. With Cash App, anyone can easily send, spend, or invest their money in stocks or Bitcoin. Spiral (formerly Square Crypto) builds and funds free, open-source Bitcoin projects. Artists use TIDAL to help them succeed as entrepreneurs and connect more deeply with fans. TBD54566975 is building an open developer platform to make it easier to access Bitcoin and other blockchain technologies without having to go through an institution.

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