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.

As a Senior Machine Learning Engineer within the Risk ML platform, you will lead projects that enable a software-driven, machine learning-centric view on all money movement and every transaction within the rapidly growing Square ecosystem. You partner closely with machine learning modelers, product managers, and other stakeholders both within and outside the team to build and maintain robust large-scale and real-time systems and algorithms that power Block’s artificial intelligence and machine learning-driven risk decision making.

Our systems and algorithms derive value from our unique and rich data from our entire product portfolio within our rapidly growing seller ecosystem. We partner with business, product, operations, and engineering teams to drive optimal decision-making systems using sophisticated modeling and machine learning, powered by the robust, scalable, and low latency system you help to build. We’re a passionate team of entrepreneurs, scientists, and engineers who are shipping machine learning models and systems that actively manages Block’s view on each transaction as it pertains to our revenue growth and risk.

You will:

• Lead the design and development of core infrastructure used by ML applications for our rapidly growing seller base

• Build new features and tools for machine learning models and data scientists that help to amplify their effectiveness

• Drive efficiencies through automation and optimization

• Drive and uphold high engineering standards and best practices

• Collaborate with business leaders, subject matter experts, product managers, machine learning modelers, etc. to solve interesting and highly impactful business problems

You have:

• 5+ years of ML software development experience

• Proficient in one of the following languages: Python, Scala, Java

• Understanding of the entire ML development lifecycle: project setup, data pipeline, model training/serving, and monitoring

• Practical experience and best practices in several of the following areas: machine learning, statistics, deep learning, natural language processing, informational retrieval to solve real-world problems

• Experience in solving real-world problems using one of the frameworks: XGBoost, PyTorch, Mxnet, Jax, or related frameworks is a big plus

• Strong ownership coupled with strong teamwork and collaboration

• The ability to clearly communicate complex results to technical and non-technical audiences and stakeholders (PMs, Operations, Engineers)

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, 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, and always assess candidates on an individualized basis.

Perks

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 TBD, 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. TBD is building an open developer platform to make it easier to access Bitcoin and other blockchain technologies without having to go through an institution.