21 hours ago
Melbourne, AustraliaStaff+
Responsibilities
- Serve as a technical expert on global card networks, specifications, message flows, certification requirements, mandates, and production behavior.
- Lead complex engineering problems at the network boundary across multiple teams, systems, and domains.
- Build production systems and certification or conformance tooling, analyze network messages, review designs and code, and debug protocol and field-level issues.
- Drive network certification and mandatory release cycles end to end and translate network requirements into engineering decisions.
- Work directly with card networks to influence requirements, resolve ambiguity, and secure favorable outcomes for Block.
- Create shared frameworks, standards, tooling, architecture, and practices that enable teams to operate independently.
- Provide design guidance, code reviews, mentorship, documentation, and technical judgment to other engineers.
- Apply AI-powered tools across the engineering lifecycle and help establish effective usage patterns.
- Participate in on-call rotation, incident response, and reliability improvements for critical financial systems.
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 rather than only integrating through a processor.
- Experience working directly with card networks to achieve 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.
- Track record of leading technically complex and ambiguous work across team boundaries and influencing technical direction beyond the immediate area of ownership.
- Experience creating durable technical leverage through frameworks, standards, tooling, architecture, or practices adopted by other engineers and teams.
- Broad understanding of the card lifecycle, with depth in areas such as issuance, fulfillment, provisioning, activation, authorization, ledgering, clearing, 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 when evaluating AI-generated output.
- Willingness to participate in an on-call rotation for critical financial systems.
Benefits
- Remote work is available, with collaboration across multiple time zones and occasional work outside normal business hours.
- Benefits include medical insurance, flexible time off, retirement savings plans, and modern family planning.
- Block provides reasonable accommodations during the interview process and is an equal opportunity employer.
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About Block
Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams — People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more — provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block.