Senior Machine Learning Engineer (Modeling), Risk

Since we opened our doors in 2009 the world of commerce has evolved immensely and so has Square. After enabling anyone to take payments and never miss a sale we saw sellers stymied by disparate outmoded products and tools that wouldnt work together.

So we expanded into software and started building integrated omnichannel solutions to help sellers sell online manage inventory offer buy now pay later functionality book appointments engage loyal buyers and hire and pay staff. Across it all weve embedded financial services tools at the point of sale so merchants can access a business loan and manage their cash flow in one place. Afterpay furthers our goal to provide omnichannel tools that unlock meaningful value and growth enabling sellers to capture the next generation shopper increase order sizes and compete at a larger scale.

Today we are a partner to sellers of all sizes large enterprise-scale businesses with complex operations sellers just starting as well as merchants who began selling with Square and have grown larger over time. As our sellers grow so do our solutions. There is a massive opportunity in front of us. Were building a significant meaningful and lasting business and we are helping sellers worldwide do the same.

The Role

Square risk is a core function to ensure we keep the platform as well as merchants safe by gaining their trust and through our dedicated economic empowerment. This role sits in the Square Risk Machine Learning team and we partner with product engineering data science policy and operations together to take a principled approach to manage fraudulent activities on our platform.

We leverage both traditional and SOTA AI and ML techniques to detect and mitigate risks in the ecosystem. We are looking for a strong machine learning engineer to build end to end AIML solutions to elevate our risk management and optimize the way we operate. If you are strong in AIML space like to work with smart people around the world and have passion to continuously take ownership and pride to challenge and improve stuff you are the right person we are looking for.

You Will

• Act as the ML modeling DRI collaborating with platform engineers product managers data scientists and policy analysts to drive the health and success of your risk squad.
• Become a risk domain expert and trusted technical leader in your risk squad.
• Build AI-powered automation tools or pipelines and propose improvements across Squares ML and broader Block risk ML org.
• Own the full lifecycle of ML solutions: data ingestion / processing / enrichment model development deployment iteration.
• Champion reusable scalable solutions by building tools libraries and packages that boost team velocity.
• Provide technical thought leadership and partner with peers and team lead to define roadmaps and execute on ambitious initiatives.
• Contribute positively to team culture as a collaborative empathetic and reliable teammate who uplifts others.

You Have

• 5 years of software engineering or machine learning experience
• A degree (preferable graduate level) in Computer Science Engineering Statistics Physics Applied Math or a related technical field
• Hands-on experience independently designing and deploying ML solutions using methods such as tree-based models deep learning transfer learning or reinforcement learning.
• Proficiency in modern ML stacks including: PySpark PyTorch MLflow SageMaker GCP Vertex AI Workflow orchestration tools (i.e. Airflow Prefect)
• Proficiency with containerization orchestration cloud platforms (AWS GCP) and CI/CD practices.
• Experience collaborating with cross-functional teams to prioritize scope and deploy ML/AI solutionsboth traditional and LLM-basedat scale.
• Strong written and verbal communication skills with the ability to explain complex concepts to technical and non-technical stakeholders.
• A natural sense of curiosity and a passion for mentoring and helping shape a world-class machine learning team.

Were 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 based solely on the core competencies required of the role at hand and without regard to any 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 were doing to build an inclusive workplace Check out our Inclusion & Diversity page

Block takes a market-based approach to pay and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidates starting pay will be determined based on job-related skills experience qualifications work location and market conditions. These ranges may be modified in the future.

Zone A: USD $189000 - USD $283600

Zone B: USD $179600 - USD $269400

Zone C: USD $170100 - USD $255100

Zone D: USD $160700 - USD $241100