Sr. Site Reliability Engineer

Company Description

Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square. After enabling anyone to take payments 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, offer buy now, pay later functionality through Afterpay, book appointments, engage loyal buyers, and hire and pay staff. 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 in one place. Afterpay furthers our goal to provide omnichannel tools that unlock meaningful value and growth, enabling sellers to capture the next generation shopper, increase order sizes, and compete at a larger scale.

Today, we are a partner to sellers of all sizes – large, enterprise-scale businesses with complex operations, sellers just starting, as well as merchants who began selling with Square and have grown larger over time. As our sellers grow, so do our solutions. There is a massive opportunity in front of us. We’re building a significant, meaningful, and lasting business, and we are helping sellers worldwide do the same.

Job Description

The Continuous Integration Infrastructure (CII) team at Square is an ensemble of hybrid systems and automation engineers.  The CII team is pivotal to the design and management of our expansive continuous infrastructure. Our CII Site Reliability Engineers (SREs) are dedicated to meticulously building systems with a dual focus on boosting developer productivity and enhancing system 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 with strong technical skills and customer-oriented mindset 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.
• Provide support to internal stakeholders with a customer oriented mindset and develop automation solutions to improve customer experience and usage of CI systems.

Qualifications

You have:

• BS or higher in Computer Science or equivalent technical experience.
• 5+ years of industry experience architecting, developing, and troubleshooting large scale infrastructure.
• 3+ years of experience in at least one of the following programming languages: Python, Go, Ruby.
• Strong system/network debugging skills.
• Strong experience with building and deploying solutions to the Cloud (AWS)
• Strong knowledge of TCP/IP networking, network, and application-level security.
• Experience with management/automation tools such as Chef/Ansible/SALT.
• Experience with monitoring tools such as Datadog, Prometheus or Grafana.
• Consistent track record of coordinating or leading large cross-team technical projects.
• Past experience with CI systems such as Jenkins 

Nice to have:

• Experience with BuildKite
• Experience working with containerization technologies like Kubernetes/ Docker

Additional Information

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.

Zone A: USD $135,200 - USD $202,800
Zone B: USD $128,500 - USD $192,700
Zone C: USD $121,700 - USD $182,500
Zone D: USD $115,000 - USD $172,400

To find a location’s zone designation, please refer to this r