Software Engineer, Merchants and Partners

The Company

Cash App is the fastest growing financial brand in the world. 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, to provide a better way to send, spend, invest, borrow and save to our 50+ million monthly actives. 

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.

The Team

Cash App Commerce owns our retail payment products including Cash App Pay and Afterpay products which gives our customers the ability to take their money further by opting to pay in full, pay in four, or longer term financing.

As a member of the Merchants & Partners team within Cash App Commerce, you will be responsible for supporting how our payment products are integrated and supported across our vast distribution network, composed of direct merchants (SMB, Enterprise), ecommerce platforms, and payment services providers.

Job Description

As a software engineer on the Merchants & Partners team, you will be responsible for building, scaling, and maintaining Afterpay and Cash App's API platforms, which includes client authentication, a policy-based authorization framework, webhook configuration and delivery, API observability, and managing our API specifications and versioning strategy across our system.

You will:

• Work cross-functionally with our product, business, and finance teams to support new payment experiences for developers using our APIs and SDKs
• Own the design, development, and maintenance of new features and existing systems
• Design and implement high-volume, highly available (99.99%+), 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 Cash App to the highest standards for security and compliance
• See the big picture to design fault tolerant systems so the team can be brave, move fast, and break things, without showing a negative impact to customers
  
  

Qualifications

You have:

• 2 or more years of software development or equivalent experience
• Experience working with public APIs - either building or consuming them
• Experience with fault-tolerant and scalable distributed systems
• Strong desire to serve developers both internal and external
• A vested interest in advancing Cash App's vision of building for economic empowerment
• Aspirations to grow and learn as an engineer on a highly collaborative team

Tools we use and teach:

• Kotlin, including JUnit, Guice and JVM
• HTTP/S, JSON, gRPC, Protocol Buffers, and Open API
• AWS Aurora (MySQL), AWS Elasticache (Redis), AWS DynamoDB, NewSQL (horizontally-sharded databases)
• Amazon Web Services (EKS, SQS, S3, MSK, KMS)
• Event-driven, service-oriented architecture