Jobs at Block

Lead technically complex card payments projects from design through production while writing and operating highly reliable financial systems. Analyze ISO 8583 messages, network mandates, routing, authorization, clearing, settlement, and processing costs. Build production code, testing and certification tooling, shared frameworks, and operational capabilities. Provide technical direction, mentor engineers, participate in design reviews and incident response, and establish safe patterns for AI-assisted engineering on critical payment systems.

Own the full enterprise sales cycle for Block’s commerce and payments portfolio, from prospecting and account strategy through negotiation, launch, and expansion. Build executive relationships with global brands, develop commercial strategies, negotiate complex agreements, coordinate cross-functional teams, and deliver revenue targets. The role requires expertise in enterprise sales, payments or digital commerce, long sales cycles, financial analysis, executive presentations, forecasting, and strategic partnerships.

Lead end-to-end machine learning initiatives for Block’s conversational support systems. Responsibilities include developing and maintaining chatbot and recommendation models, researching LLM, RAG, fine-tuning, and real-time inference architectures, shaping long-term ML roadmaps, and guiding cross-functional teams. The role also requires communicating technical strategy and outcomes to leadership and external stakeholders while delivering scalable, production-ready AI solutions across Cash App, Square, and other Block products.

Build and operate highly reliable card-issuing systems at Block, focusing on network integrations, ISO 8583 message flows, authorization, clearing, certification, mandates, and production behavior. Lead complex cross-team engineering initiatives, create conformance tooling and shared frameworks, debug protocol-level issues, collaborate directly with card networks, mentor engineers, apply AI-assisted development practices, and participate in on-call support for critical financial systems.

Own a North Seattle territory through field-based prospecting, business visits, live product demonstrations, consultative selling, and full-cycle deal closing. Build pipeline through cold outreach, community engagement, events, networking, and partnerships. Develop relationships with local sellers, provide onboarding support, maintain Salesforce pipeline accuracy, forecast performance, and consistently exceed sales quotas across Square’s software, hardware, and financial services ecosystem.

As a Business Development Representative, you'll reach out to potential merchants, promote Square's services, manage a sales pipeline, and exceed monthly sales quotas while advancing your sales career.

Lead end-to-end data science for Cash App Lending: define measurement frameworks, run experiments, evaluate model and policy performance, use AI tools to accelerate analysis, partner with product, engineering, and risk, and mentor junior data scientists to drive product and risk decisions.