10 hours ago
Base Salary
$264k - $395k/yr
Responsibilities
- Lead one or two acquiring projects from technical design through production rollout.
- Build production payment systems and testing, certification, and operational tooling for direct network and acquirer connections.
- Read network specifications, ISO 8583 messages, mandates, and interchange rules and translate them into engineering decisions.
- Own technical direction for routing, retries, authorization rates, processing costs, reliability, and correctness.
- Analyze payment messages and debug issues at the protocol and field level.
- Create shared frameworks, standards, architecture, tooling, and practices that provide durable technical leverage.
- Review designs and code, mentor engineers, document technical decisions, and help develop future staff engineers.
- Partner with technical leads, product and finance operations, and stakeholders across Square, Cash App, and Afterpay.
- Build with AI coding agents and establish safe usage patterns for systems that move money.
- Participate in on-call, incident response, and continuous reliability improvements.
Requirements
- Deep card-payments experience at the message level, including integrations with networks, acquirers, or processors using ISO 8583 or an acquirer host format.
- Acquiring or merchant-side experience is ideal, and direct network connection experience is a strong plus.
- Experience with partial and incremental authorizations, reversals, tips, currency conversion, and interchange qualification.
- Strong hands-on software engineering experience building and operating highly reliable financial or payments systems at scale.
- Experience leading technically complex projects from design through delivery and setting technical direction for other engineers.
- Experience creating frameworks, standards, tooling, architecture, or practices adopted by other engineers or teams.
- Broad end-to-end understanding of card payments, including tokenization, routing, authorization, capture, clearing and settlement, reconciliation, interchange, processing costs, or chargebacks.
- Understanding of Visa, Mastercard, American Express, Discover, and US debit-network rules and the roles of acquirers, processors, payment facilitators, and sponsor banks.
- Daily experience building with AI coding agents and sound judgment about their output.
- Willingness to participate in an on-call rotation for critical financial systems.
- ISO 20022 experience is a plus.
Benefits
- Remote work, medical insurance, flexible time off, retirement savings plans, and modern family-planning benefits are offered.
- The role works US West Coast hours and can be based in the Bay Area or Seattle offices or remotely within the Pacific time zone.
Categories
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.