Staff Software Engineer, Payment Foundations

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, 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.

The Role

As a Senior Software Engineer on the Payment Foundations team, you will be responsible for designing, building, and maintaining Payments platform services and infrastructure that 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 merchants and buyers all over the world.

You Will

• Build our Payments Platform, used by the rest of the organization and a key strategic asset of Square
• Design and implement reliable, high-volume, low-latency, distributed transaction processing systems, making thoughtful tradeoffs between consistency and availability when both are not possible
• Abstract away the legacy APIs of the financial world into consistent, coherent service APIs for Square and our sellers' products to build upon
• Build systems that manage customers' sensitive data and hold Square to the highest standards for security and compliance
• Mentor other engineers and contribute to the direction of the team
• Participate in agile development processes, including stand-ups, sprint planning, and retrospectives
• Work with our product, business, and finance teams to develop Square's global payments strategy
• Focus on operational excellence to deliver fault-tolerant systems enabling our teams to move fast without negatively affecting our customers

You Have

• 8+ years of software engineering experience
• BA/BS degree in Computer Science or equivalent practical experience
• Experience in the delivery of high-scale software solutions
• Experience successfully leading complex projects and breaking down the work into components and milestones that can easily be picked up by other engineers
• Interest in changing the payments landscape in the US and globally
• Eagerness to learn, share your ideas, and work with others
• Willingness to collaborate and grow as an enginee

Technologies We Use and Teach

• Java, Kotlin, Python
• Guice,Protocol Buffers, jOOQ
• MySql, Aurora, GCP Spanner, ElasticSearch, GraphQL
• AWS Cloud Technologies, Kubernetes, terraform, Datadog
• Design patterns, test driven development
• Metrics driven decision makin

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. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We also consider qualified applicants with criminal histories for employment on our team, and always assess candidates on an individualized basis.

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.

Block will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and “fair chance” ordinances.