Senior Infrastructure Security Engineer / Architect (Build Systems & Software Supply Chain Security)

  • Atlanta, GA
  • Employees can work remotely
  • Full-time
  • Alternate Location: Toronto, Canada

Company Description

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.

Job Description

Block’s Information Security culture is focused on enabling our engineering teams to build and ship secure products. We achieve this by designing, building, and deploying state of the art security alongside our product and infrastructure teams.

The Software Supply Chain Security team, within Infrastructure Security, is focused on ensuring that the code Block ships is as secure as possible. We blend third-party tooling with in-house systems to improve the security of many types of code including backend, frontend, infrastructure, and mobile.

You will:

  • Harden Block’s build systems and overall software supply chain by designing, architecting and building security services. Your work leading the implementation of security systems will have a broad impact across Block’s software development organization, securing the critical systems for delivering our products.

  • Partner with groups across the company to secure multiple different CI and build systems (notably for web apps, mobile apps, hardware, etc) and programming languages. 

  • Collaborate with software engineers across the company to implement solutions that “grease the wheels” of security best practices from commit to artifact

  • Secure multiple different build & CI systems and grow build attestation systems. 

  • Work remotely or in any Block office location in the USA or Canada. Occasional travel may be required for team offsites after the pandemic. SSCS is a fully distributed team.


Desired Background:

  • 6+ years total experience in tech, with at least 3 years of experience in security

  • You work well cross-functionally, and can communicate with audiences who may not have a security background.

  • You have worked both in information security (Application Security, Detection/Response, Blue Team, Red Team, etc), and at least one other discipline such as systems, software engineering, test, etc.

  • You are also familiar with the software development process and have worked closely with engineers.

  • You are familiar with at least one cloud platform (AWS, GCP, etc) or on-prem infrastructure deployments.

  • You have experience writing code to solve security issues. This could be writing security tools, integrating security into products, or automation/management of security-sensitive environments.

  • Interest in Software Supply Chain Security (no experience required)


Technologies We Use & Teach:

  • Ruby and Rails

  • Kubernetes

  • Jenkins, BuildKite, Github Actions

  • AWS, GCP & on-Prem infrastructure

  • Grafeas, build attestation systems, and other tools pertinent to Software Supply Chain Security

Additional Information

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 a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, without regard to race, color, religion, gender, national origin, age, disability, pregnancy, gender expression or identity, sexual orientation, citizenship, or any other legally protected class. 

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

Additionally, we consider qualified applicants with criminal histories for employment on our team, and always assess candidates on an individualized basis.


We want you to be well and thrive. Our global benefits package includes:

  • Healthcare coverage
  • Retirement Plans
  • Employee Stock Purchase Program
  • Wellness perks
  • Paid parental leave
  • Paid time off
  • Learning and Development resources

Block, Inc. (NYSE: SQ) is a global technology company with a focus on financial services. Made up of Square, Cash App, Spiral, TIDAL, and TBD54566975, we build tools to help more people access the economy. Square helps sellers run and grow their businesses with its integrated ecosystem of commerce solutions, business software, and banking services. With Cash App, anyone can easily send, spend, or invest their money in stocks or Bitcoin. Spiral (formerly Square Crypto) builds and funds free, open-source Bitcoin projects. Artists use TIDAL to help them succeed as entrepreneurs and connect more deeply with fans. TBD54566975 is building an open developer platform to make it easier to access Bitcoin and other blockchain technologies without having to go through an institution.

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