Hiring: Staff Software Engineer, Financial Platform - Issuing Company: Cash App Location: Oakland, CA Job Posted Time: 2026-09-11 13:31:09 Employment Type: Remote About the job Required Skills: •This is a hands-on role. You will build systems and tooling, debug at the message level, and turn your network expertise into durable capabilities that other engineers can use. You will also work directly with the networks themselves — not only understanding what they require, but knowing where and how to influence outcomes for Block. •Be a deep technical expert on global card networks, helping Issuing teams interpret network specifications, message flows, certification requirements, mandates, and production behavior — and working directly with the networks to influence requirements, resolve ambiguity, and secure outcomes that matter for Block. •Lead complex, ambiguous engineering problems at the network boundary that span multiple teams, systems, or domains. •Partner with technical leads, program DRIs, and senior stakeholders to shape solutions where card-network requirements intersect with Block's issuing platform. •Stay deeply hands-on: write production code, build certification and conformance tooling, analyze network messages, review designs and code, and debug issues down to the protocol and field level. •Drive network certification and mandatory release cycles end to end, and translate network requirements into clear, pragmatic engineering decisions. •Establish shared frameworks, standards, tooling, and practices that make network expertise durable and enable teams to operate independently. •Raise the technical capability of engineers around you through design guidance, code reviews, mentorship, documentation, and clear technical judgment. Qualifications: •Deep, current expertise with at least one major card network, ideally Visa, including direct connectivity, ISO 8583, authorization and clearing flows, stand-in processing, specifications, certification, and mandate cycles. •Personally built, certified, or operated a live direct network connection — not only integrated through a processor. •Strong hands-on software engineering experience building and operating highly reliable financial or payments systems at scale. •A track record of leading technically complex, ambiguous work across team boundaries and influencing technical direction beyond your immediate area of ownership. •Broad understanding of the card lifecycle, with depth in areas such as issuance and fulfillment, provisioning and activation, authorization, ledgering, clearing and settlement, reconciliation, disputes, or fraud. •Solid functional working knowledge of Mastercard and American Express, alongside deep expertise in at least one major network. •Fluency with AI-assisted engineering workflows and sound judgment in evaluating and applying AI-generated output. •Willingness to participate in an on-call rotation for critical financial systems. •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 Compensation: •Flexible work environment (work from home / hybrid options) Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!