Senior Software Engineer, Detection & Response Engineering

  • Full-time

Company Description

We believe everyone should be able to participate and thrive in the economy. So we’re building tools that make commerce easier and more accessible to all. We started with a little white credit card reader but haven’t stopped there. Our new reader helps our sellers accept chip cards and NFC payments, and our Cash app lets people pay each other back instantly. 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. Let’s shorten the distance between having an idea and making a living from it. 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

We’re looking for a senior Ruby and/or Rails developer to join the Detection & Response Engineering team, part of Square’s Information Security organization. Your primary focus will be developing and maintaining our suite of internal intrusion detection tools. We expect you to be capable of seeing projects through their entire lifecycle, from green-fielding to maintenance mode. While a background in information security will be useful for this role, it is not a requirement. An ideal candidate will be able to hit the ground running and highly capable of learning new tools on the fly.

Qualifications

Our systems are mostly built on top of Ruby (and often Rails). An ideal candidate will have many years of experience with both. Additionally, we will look for high proficiency and understanding of Linux and MacOS operating systems, relational databases and SQL, network protocols, as well a strong capacity for technical design.

Familiarity and/or expertise with information security, securing and monitoring of cloud-based workflows, cryptography, systems administration, non-Ruby languages (e.g., Java, C, Go, Rust, Python), Apache Kafka, osquery, and Redis will be useful but aren’t prerequisites for the position.

Additional Information

At Square, we value diversity and always treat all employees and job applicants based on merit, qualifications, competence, and talent. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We will consider for employment qualified applicants with criminal histories in a manner consistent with the requirements of the San Francisco Fair Chance Ordinance.

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