# Staff Software Engineer, Financial Platform - Issuing

**Company**: Block
**Location**: Seattle, WA
**Work arrangement**: remote
**Experience**: staff
**Job type**: full-time
**Salary**: $263,600-$395,400 USD
**Category**: Engineering
**Industry**: Finance

**Apply**: https://job-boards.greenhouse.io/block/jobs/5421096008?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_f195eace-fdb

## Description

At Block, we strive to build the best financial products in the world. The Financial Platform Issuing team owns the card issuing platform that serves every Block brand , powering Cash App Card, the fourth-largest debit card program in the US, alongside Square Card and the new card programs Block launches next.

As a Staff Software Engineer on the Issuing server engineering team, you will bring deep card-network expertise to some of the most complex technical work on our roadmap. You will work alongside technical leads and cross-functional teams, going deep where our platform meets the networks: specifications, protocols, certification, mandates, conformance, and production behavior.

Responsibilities:

- 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.

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.

## Skills

### Required
- Visa
- ISO 8583
- card networks
- software engineering
- financial systems
- payments systems

### Nice to have
- Mastercard
- American Express
- AI-assisted engineering workflows

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Source: [Apply at job-boards.greenhouse.io](https://job-boards.greenhouse.io/block/jobs/5421096008?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)