Block

Senior Software Engineer on Cash App’s Product Platform Data Stores team, building database and storage platforms that help Block engineers safely create, ship, and operate products. The role combines backend engineering, distributed systems, cloud infrastructure, database performance, and developer tooling.

Lead the development of machine learning systems that power Block’s conversational AI and customer-support experiences across Cash App, Square, and other products. This staff-level role combines hands-on ML delivery, strategic technical leadership, and R&D in LLMs, RAG, fine-tuning, and real-time inference.

Lead hands-on engineering for Block’s global card-issuing platform, shaping how it connects to card networks and processes transactions at scale. This Staff Engineer role combines deep payments expertise, production coding, certification tooling, and cross-team technical leadership.

Lead hands-on engineering for Block’s global card-issuing platform, with deep ownership of network integrations, certifications, authorization flows, and production reliability. This Staff role combines payment-network expertise with technical leadership across complex, cross-team systems.

Staff Applied Machine Learning Engineer building production ML systems that turn customer and product data into trusted signals for ranking, recommendations, risk-aware decisions, growth, and customer intelligence. The role combines deep applied ML expertise with end-to-end ownership of reusable signal and decision systems.

Senior Business Systems Engineer building and scaling APIs, integrations, automations, and data flows across Block’s CRM, finance, procurement, supply chain, and service systems. The role is hands-on, distributed, and focused on reliable enterprise systems using Python, SQL, MuleSoft, cloud services, and modern AI-enabled productivity tools.

Build and enhance the backend tax engine powering Cash App Taxes, translating complex federal and state tax requirements into reliable software used by millions of customers. You’ll own features from form logic through e-file submission while collaborating with tax experts and cross-functional teams.

Software Engineer building backend financial platforms, workflow engines, integrations, and reporting infrastructure that support Block’s global finance operations. The role combines distributed systems engineering with AI-enabled development and cross-functional financial domain expertise.