Staff Software Engineer

Job Description

REQUIREMENTS

• 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.
• Experience working directly with card networks to land concrete outcomes, such as rulings, exceptions, extensions, configuration changes, defect fixes, or certification outcomes.
• 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.
• Experience creating durable technical leverage — frameworks, standards, tooling, architecture, or practices that other engineers and teams adopt.
• 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.
• 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.

RESPONSIBILITES

• 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.
• Apply AI-powered tools throughout the engineering lifecycle to improve velocity and quality, and help establish effective patterns for broader team use.
• Share operational ownership of critical financial systems through on-call, incident response, and continuous improvements to reliability and correctness.

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