CI Site Reliability Engineer

  • San Francisco, CA
  • Full-time

Company Description

Since we first opened our doors in 2009, the world of commerce has evolved immensely – and so has Square. After enabling anyone to take a payment and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn’t work together. So we expanded into software and started building integrated, omnichannel solutions – to help sellers sell online, manage inventory, run a busy kitchen, book appointments, engage loyal buyers, and hire and pay staff. And across it all, we’ve embedded financial services tools at the point of sale, so merchants can access a business loan and manage their cash flow all in one place.

Today, we’re a partner to sellers of all sizes – large, enterprise-scale businesses with complex commerce operations, sellers just starting out, as well as merchants who began selling with Square and have grown larger over time. As our sellers scale, so do our solutions. We all grow together.

There is a massive opportunity in front of us. We’re building a business that is big, meaningful, and lasting. And we are helping sellers around the world do the same.

Job Description

CI (Continuous Integration) Site Reliability Engineers at Square are hybrid systems and automation engineers integral to designing and managing our distributed continuous infrastructure. CI SREs build systems with an eye towards improving developer productivity, performance, and reliability. 

CI Site Reliability Engineers have a major impact across Square, and especially in Hardware, through building and operating our on-prem data centers and AWS infrastructure, and optimizing mission-critical internal applications. We’re looking for engineers who want to be a part of developing, maintaining, and scaling this infrastructure via software tooling and automation.

You will:

  • Build scalable infrastructure to manage CI systems (both on-prem and AWS) and applications.

  • Minimize risk of reliability related failure outcomes as pertaining to durability, availability, performance.

  • Drive improvement projects and handle  incidents in an effective and organized manner.

  • Collaborate across multiple teams including IT Support, Production Platform Engineering, Hardware Engineering, and Devices Software Engineering.

  • Build automation tools to detect and remediate system health, and prevent those issues from reoccurring.

  • Build automation to help with capacity planning to scale our on-prem and CI AWS infrastructure.

  • Perform periodic on-call duty to handle availability and efficiency of the continuous integration infrastructure.


You have:

  • BS or higher in Computer Science or equivalent technical experience.

  • 6+ years of industry experience architecting, developing, and troubleshooting large scale infrastructure.

  • 4+ years of experience in at least one of the following programming languages: Python, Go, Ruby.

  • Strong system/network debugging skills.

  • Strong knowledge of TCP/IP networking, network, and application-level security.

  • Experience with management/automation tools such as Puppet/SALT.

  • Consistent track record of coordinating or leading small cross-team technical projects.

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. Square 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, veteran status, 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, assessing candidates in a manner consistent with the requirements of the San Francisco Fair Chance Ordinance.


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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