Staff Software Engineer, Cash App Web Infrastructure

It all started with an idea at Block in 2013. Initially built to take the pain out of peer-to-peer payments, Cash App has gone from a simple product with a single purpose to a dynamic ecosystem, developing unique financial products, including Afterpay/Clearpay, to provide a better way to send, spend, invest, borrow and save to our 50+ million monthly active customers. We want to redefine the world’s relationship with money to make it more relatable, instantly available, and universally accessible.

Today, Cash App has thousands of employees working globally across office and remote locations, with a culture geared toward innovation, collaboration and impact. We’ve been a distributed team since day one, and many of our roles can be done remotely from the countries where Cash App operates. No matter the location, we tailor our experience to ensure our employees are creative, productive, and happy.

The Role

Cash App Web Infrastructure is an engineering-driven team that builds and maintains infrastructure that powers our web experiences. We are product focused. We span a broad spectrum of web server development; from service architecture, availability, CDNs, to libraries and frameworks used across multiple services. We are responsible for the availability, cost, and security of our web systems. We collaborate with and support numerous product teams across Cash App.

You Will

• Build the future server architecture to power the web frontend projects across Cash App, including hosting, deployment, traffic routing, and performance
• Bring experience and knowledge to the team, advancing the web profession at Cash App, and learning from others along the way
• Own the full traffic path from CDN edge ingestion, to traffic routing, to request handling
• Work with product and marketing teams to increase their velocity from idea to shipping
• Ship incrementally and often
• Build and operate privacy and security hardening mechanisms in applied security situations and threat mitigation
• Work with our team, and the security, and risk teams to identify and mitigate real bad actors on our systems

You Have

• A strong motivation to contribute to a product that will fundamentally change the way people interact with their money
• A demonstrated desire to perform and grow as an engineer and educate others on the team
• A strong depth and breadth of experience building and shipping web focused server software
• Experience implementing threat mitigation strategies and bot detection is a plus but not required
• Demonstrated technical initiative

Technologies We Use and Teach

• Server: Java, Kotlin, NodeJS, Amazon Web Services, CDNs (Cloudflare, Fastly), Event-driven microservice architecture
• Communication: HTTP, JSON, gRPC, and Protocol Buffers
• Frontend (less focus): React, JavaScript, TypeScript, CSS

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.