Software Engineer, Payment Authentication

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
As a software engineer on the Payments team, you will be responsible for designing, building, and maintaining the Payments Platform services and infrastructure that securely move money for Square. You will be deeply involved in the technical details of building highly available and reliable services, while also working with product teams to enable Square to rapidly build new capabilities for our sellers and buyers all over the world.
You will:

• Work with engineering, product, and other partners to build software that is clean, reusable, well-tested and forward-thinking by leveraging cloud technologies
• Design and develop modern APIs that integrate various surfaces with server backends
• Drive engineering of well-designed, reusable and secure systems
• Maintain and promote operational excellence with focus on high reliability, performance and scalability
• Promote engineering best practices and help define technical roadmap for the team
• Focus on delivering fault tolerant systems that allow teams to move quickly without negatively affecting our customers

Qualifications
You have:

• 5+ years of software engineering experience
• BA/BS degree in Computer Science or equivalent practical experience
• Experience in delivery of complex high-scale software solutions
• Eagerness to share your ideas, and openness to those of others
• Ability to clearly communicate designs to technical and business audiences
• A willingness to collaborate and grow as an engineer

Technologies we use:

• Kotlin, Java, Golang, Ruby
• JavaScript, ES6, Ember, Sass, and other web-app frameworks
• AWS, Docker, Kubernetes

Qualifications
You have:

• 5+ years of software engineering experience
• BA/BS degree in Computer Science or equivalent practical experience
• Experience in delivery of complex high-scale software solutions
• Eagerness to share your ideas, and openness to those of others
• Ability to clearly communicate designs to technical and business audiences
• A willingness to collaborate and grow as an engineer

Technologies we use:

• Kotlin, Java, Golang, Ruby
• JavaScript, ES6, Ember, Sass, and other web-app frameworks
• AWS, Docker, Kubernetes