Security Software Engineer, Identity Infrastructure

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.
The Role
Our team is responsible for implementing and operating the foundational authentication and authorization mechanisms that ensure secure communication between services across Block's infrastructure. We play a critical role in safeguarding service interactions within Block's data centers and cloud environments.
As a Security Software Engineer on the Identity Infrastructure team, you will build high-impact systems that enable secure, scalable, and reliable authentication and authorization across the organization, spanning all of Block's internal ecosystem and serving the needs of all its product lines. Your work will be critical to keeping Block's customer data safe and enable the business to grow responsibly.
You Will

• Implement complex identity and access projects
• Improve and expand our foundational systems across Block's infrastructure environments while prioritizing reliability and security
• Write high-quality, well-tested code following engineering best practices
• Proactively identify and resolve technical issues before they impact production
• Participate in design reviews and provide constructive feedback to your peers
• Make sound technical decisions while considering business impact and tradeoffs
• Collaborate effectively with cross-functional teams to deliver security solutions

You Have

• 4+ years of software engineering experience
• Taken technical initiative on previous projects, having contributed to medium-to-large feature releases
• A strong desire to learn and grow your career in identity, security and/or infrastructure
• Curiosity that pushes you to find flaws in a complex system and take whatever steps are necessary to fix them
• The ability to persevere in complex situations, across multiple axes: e.g. scale, uncertainty, interconnectedness
• Experience using AI agents, tools, or frameworks to solve security problems is a positive but not a requirement.

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 is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page .
While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted.
Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.
To find a location's zone designation, please refer to this resource . If a location of interest is not listed, please speak with a recruiter for additional information.
Zone A:
$180,000 - $270,000 USD
Zone B:
$171,000 - $256,600 USD
Zone C:
$162,000 - $243,000 USD
Zone D:
$153,000 - $229,600 USD
Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block.
Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone.