Sr. Software Security Engineer, Software Supply Chain Security

Square, Chicago IL, US

Square works for every business.

Duration: Full-Time

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 Product Security, is focused on ensuring that Block’s code is secure from PR to Production. 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: 

  • Build systems that secure the entirety of Square's software supply chain.

  • Integrate with our Github, CI/CD, and build attestation systems.

  • Work cross-functionally with Square's infrastructure teams and other security teams.

  • Learn about information security and apply that knowledge towards real-world problems.

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


Desired Background: 

  • You have experience as any of the following, or experience in similar job roles: programmer, developer, SWE, security engineer, devops engineer, infrastructure engineer, or cryptography engineer.

  • You have experience developing and/or integrating components of a CI or CD system.

  • You possess at least a users-level understanding of how certificates are used to sign or encrypt data.

  • You have a strong desire to learn about information security and grow your career in the direction of InfoSec (prior experience in InfoSec not required).

  • Experience with DevOps, infrastructure code, and similar is helpful but not required.


Fields and Technologies we use and teach:

  • Information Security

  • Ruby

  • Python

  • Java

  • Linux

  • Docker

  • Kubernetes

  • AWS

  • GCP

  • Terraform

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 TBD, 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. TBD is building an open developer platform to make it easier to access Bitcoin and other blockchain technologies without having to go through an institution.

About Square

We believe the economy is better when everyone has access. When everyone has room to grow. No one should be left out because the cost is too great or the technology too complex. So we’re building easy tools to empower and enrich people. Tools that shorten the distance between having an idea and making a living from it—because we believe in fair and square. We started with a little white card reader but haven’t stopped there. Our new reader helps our sellers accept chip cards and NFC payments, our Cash app lets people send money instantly, and we’re building easy tools for customers, too. We’re empowering the electrician to send invoices, setting up the food truck with a delivery option, helping the clothing boutique pay its employees, and giving the coffee chain capital for a second, third, and fourth location. We’re here to help sellers of all sizes start, run, and grow their business—and helping them grow their business is good business for everyone.


Want to learn more about Square? Visit Square's website.