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.

To solve this problem, we expanded into software and built integrated solutions to help sellers sell online, manage inventory, 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.

As Square's business continues to experience growth, these teams serve the heart of the business, allowing Square product teams and third parties to build safe, scalable, and reliable products. We are looking for software engineers who feel comfortable in all parts of the stack to join our Square Commerce Platform team. Here are some of our teams:

Payments

• The Payment Acceptance team owns the core of Square’s online payments stack and operates it at a massive scale. 
• We provide APIs for first and third parties to access our platform.
• We move money between customers, credit card processors, and banks quickly, reliably, and securely – and our ambition is to make this easy.
• We solve several technical challenges: Security and privacy, monitoring, re-architecting for the future, scalability, supporting payment methods such as cryptocurrency, 3DS, ACH, and support Square's expansion to support new payment types in international markets.
• We are a backend service team, and use Java on Square's Linux servers and cloud platforms along with technologies like Guice, Guava, Protocol Buffers, jOOQ, MySQL, Kafka, AWS and GCP.

Catalog

• The Catalog team builds the platform and product features that allow Square merchants to manage the items and inventory they sell. 
• We support all types of merchants from food trucks with just a few menu items to retail chains with hundreds of thousands of SKUs for sale across many locations.
• The team is involved in the technical details of building available and reliable services, while also working with product teams to allow Square to build new capabilities for our merchants and buyers all over the world.
• We partner with external developers to build public APIs that allow Square to expand its ecosystem.

Prices

• The Prices team manages tools that help Square merchants set prices, manage taxes, and provide discounts to their customers.
• We are a full-stack team, delivering features through Mobile, Web, and API across nearly all of Square’s products.
• We are reinventing Square’s models for pricing and taxes, building flexible primitives to manage complex needs.
• We also own Square’s subscription platform, managing all subscriptions, usage, and billing.
• We use Java / Kotlin on Android, Objective-C / Swift on iOS, Javascript and Ember on the web, and Java and Ruby on the server. 

Orders

• We are a team that ties together many software components across Square, including Payments, Prices and Catalog, allowing developers to quickly combine all components to develop new features on top of Square’s platform.
• Our Order Platform APIs are designed for use by first (internal) and third-party (external) developers.
• We design high-volume, low-latency, distributed transaction processing systems, making thoughtful tradeoffs between consistency and availability when both are not possible.
• Our work spans client and server environments and we use Java, Go, Javascript and Ember.JS.

You have:

• BS Degree in Computer Science or equivalent. Minimum 4 years of industry experience
• Natural curiosity and a desire to explore solutions in a small and focused team
• Experience pursuing side projects, research, or open source projects

Technologies we use:

• Java, Ruby, Go
• iOS, Android, web
• Guice, Guava, Protocol Buffers, gRPC, jOOQ, Rails
• MySQL, Redis, Kafka, Vertica

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. Square 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’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.

Perks

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 TBD, 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. TBD is building an open developer platform to make it easier to access Bitcoin and other blockchain technologies without having to go through an institution.