Senior Security Engineer, Cloud Infrastructure

  • Full-time

Company Description

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. We started with a little white credit card reader but haven’t stopped there. We’re empowering the independent electrician to send invoices, setting up the favorite food truck with a delivery option, helping the ice cream shop pay its employees, and giving the burgeoning 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.

Job Description

Square’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.

As a Senior Security Engineer, Cloud Infrastructure, you will be responsible for hardening of Square’s cloud computing and cloud network environments. Square is in the early days of migrating existing on-prem services to the cloud. Your work will shape the way we use AWS for years to come.

We’re looking for someone with both a broad knowledge of security and systems, as well as a deep knowledge of how to apply that to AWS. The ideal candidate will have experience across a range of technical disciplines and may have had past jobs such as Information Security (Hardening, Detection/Response, Blue Team, etc) and systems (SRE, SysAdmin, Network Engineer, etc). This is a senior role, and we’re looking for someone who has experience with a wide variety of real-world issues.

You will:

  • Design and build the security components of the next phase of Squares infrastructure.
  • Build security automation for cloud environments.
  • Work closely with the infrastructure and product teams who are moving to the cloud, and ensure that they have secure-by-default systems.
  • Work in the San Francisco or New York City office. Remote work in the USA or Canada is a possibility depending on experience. Occasional travel may be required.


You have:

  • 5-10 years total experience in tech.
  • You work well cross-functionally, and can communicate with audiences who may not have a security background.
  • AWS experience
    • At least 2 years of AWS experience.
    • Experience implementing AWS security and hardening, especially in a large or complex environment.
    • Deep knowledge of AWS IAM and how to configure least-privilege.
    • Knowledge of AWS networking and how to securely interconnect multiple AWS accounts, on-prem servers, etc.
    • Expertise in automation tools such as Terraform, CloudFormation, Ansible, etc.
  • Security experience
    • At least 2 years experience working in security (does not need to be on AWS).
    • Experience writing code to solve security issues. This could be writing security tools, or automation/management of security-sensitive environments.
    • Experience securing Linux systems - hardening, logging/detection, general systems design.
    • Networking knowledge, including network security and segmentation.

Even better:

  • Programming in Python and/or Ruby.
  • Experience with Kubernetes.
  • Google Cloud experience. While most of our cloud infra is AWS, we have a limited GCP footprint.

Additional Information

At Square, our purpose is to empower – within and outside of our walls. In order to build the best tools for the businesses and customers we support all over the world, we have to start at home with a workforce as diverse and empowered as our sellers. To this end, we take great care to evaluate all employees and job applicants equally, based on merit, competence, and qualifications. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or any other characteristic protected by law. We encourage candidates from all backgrounds to apply and always consider qualified applicants with arrest and conviction records, in accordance with the San Francisco Fair Chance Ordinance. Applicants in need of special assistance or accommodation during the interview process or in accessing our website may contact us by sending an email to assistance(at) We will treat your request as confidentially as possible. In your email, please include your name and preferred method of contact, and we will respond as soon as possible. Perks At Square, we want you to be well and thrive. Our global benefits package includes: Healthcare coverage, Retirement Plans, Employee Stock Purchase Program, Meal reimbursements, Wellness perks, Paid parental leave, Flexible time off, Learning and Development resources
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