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.
As a Senior Software Engineer on the Payment Connections team, you will be responsible for designing, building, and maintaining the payment 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.
Work on a team that handles the processing of billions of global payments for Square using a high availability architecture.
Translate financial platform specifications into APIs used by Square teams to move money accurately.
Write testable, maintainable code from design to production considering monitoring, scalability, and operational tooling.
Evolve accepted payment methods across Square products to ensure our customers never miss a sale.
Design and implement high-volume, low-latency, distributed transaction processing systems, making thoughtful tradeoffs between consistency and availability when both are not possible
Build systems that manage customers’ sensitive data and hold Square to the highest standards for security and compliance
Work cross-functionally with our product, business, and finance teams to develop Square’s global payments strategy
Mentor other engineers and contribute to the direction of the team
Ability to break down complex projects into components or milestones that can easily be picked up by other engineers.
Innate curiosity and a desire to be responsible for all aspects of reliably moving transactions worth billions of dollars in a small, highly focused team
Understanding and curiosity in creating highly available, scalable, low-latency, global systems
Interest in changing the payments landscape in the US and globally
Bachelor's degree or relevant industry experience and 8+ years of software development experience in Java, C++, Go or similar
Technologies we use and teach:
Financial Network Protocols such as ISO8583
Guice, Guava, Protocol Buffers, gRPC, jOOQ, MySQL
BigQuery, SignalFX, Kafka, Zookeeper
Deploying code with Kubernetes, Docker, etc to AWS and Square’s data centers
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 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, 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, and always assess candidates on an individualized basis.
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.