Machine Learning Engineer • Staff

Who you are

You have extensive experience in machine learning, particularly in developing and optimizing models for financial applications — your expertise allows you to tackle complex modeling challenges, ensuring accuracy and fairness in credit assessments. You are proficient in Python and have hands-on experience with machine learning frameworks like TensorFlow, which you have used to build and deploy models in production environments.

You understand the intricacies of credit scoring and the importance of maintaining model calibration across diverse borrower populations — your analytical skills enable you to design features that generalize as portfolios grow, ensuring that your models remain robust and effective. You are comfortable working with large datasets and have experience in SQL for data manipulation and analysis.

What you'll do

In this role, you will lead the development of machine learning models that underpin Block's credit products, including Afterpay and Cash App Borrow — your work will directly impact how credit is allocated to millions of customers, particularly those underserved by traditional financial systems. You will collaborate with cross-functional teams to identify key features and metrics that drive model performance, ensuring that your solutions are both innovative and practical.

You will be responsible for maintaining and improving existing models, conducting regular evaluations to ensure they meet performance standards — your insights will guide the evolution of our credit products, helping to refine our approach to risk assessment and customer engagement. You will also mentor junior engineers, sharing your knowledge and fostering a culture of learning within the team.

What we offer

At Block, you will be part of a mission-driven company that is redefining the financial landscape — we offer a collaborative work environment where innovation is encouraged, and your contributions will have a meaningful impact. We provide competitive compensation and benefits, including flexible work arrangements to support your work-life balance. Join us in building a financial system that is open to everyone.