Skip to content
SquareSquareNew York, NY

Software Engineer, Cash App - Lending Products

Builds scalable systems and APIs for Cash App's lending products, partnering with risk, compliance, and product teams to deliver credit access at scale. Requires 5+ years in complex systems, AI-first mindset, and expertise in backend technologies like Java/Kotlin and AWS.

153k – 270k
Remote5+ YOEBackend Engineering

About the role

You Will

  • Partner closely with credit risk, legal & compliance, product managers and other engineers to take the Lending capability to the next level.
  • Lead or contribute to projects from hypothesis to production capability, ensuring ownership of the output quality.
  • Build financial primitives by acting as an IC or lead on atomic, composable, API-level building blocks that serve the Block's intelligence layer.
  • Take a developer-centric approach to designing and building clean APIs, optimizing strictly for uptime, latency, regulatory compliance, and cost-per-transaction.
  • Experiment with emerging approaches and support team capability by sharing learnings and providing feedback.
  • Operate and manage existing Cash services.
  • Make recommendations to improve the team and wider Engineering practices.
  • Help interview candidates, organize external recruiting/networking activities, and contribute to the broader tech and open-source communities.

You Have

  • Embrace an AI-first mentality. Leverage AI to augment your knowledge and capability in navigating development in complex systems with confidence.
  • Familiar with agentic engineering.
  • 5+ years working on complex systems and delivering quality software, with clear expertise developed in one or more technical areas.
  • Curiosity that pushes you to find flaws in complex systems and take whatever steps are necessary to fix them.
  • Resilience to persevere in complex situations across multiple axes: e.g., scale, uncertainty, and interconnectedness.
  • Self-directed and comfortable with ambiguity, with a willingness to publish your reasoning and be wrong publicly—which is essential for thriving in our transparent DRI/IC model.

Technologies We Use and Teach

  • Java, Kotlin
  • AWS
  • HTTP, JSON, gRPC, Protocol Buffers
  • OkHttp, Jetty, JUnit, Guice
  • Hibernate, jOOQ, Aurora, MySQL, DynamoDB, Redis, Vitess
  • Kafka, event-driven architecture, microservices
  • DataDog
  • Buildkite, Gradle

Skills

JavaKotlinAWSgRPCKafkaMySQLDynamoDBRedisMicroservicesEvent-Driven ArchitectureHibernateJooqAuroraVitessProtocol Buffers
Duolingo

Software Engineer II, Backend

DuolingoNew York, NY +1

Backend engineer building scalable infrastructure for Duolingo's short-form language lessons and ads systems. Requires CS bachelor's, strong algorithms/data structures skills, and experience in Java/Python/Kotlin.

153k – 207k
On-siteBackend Engineering
Zoox

Software Engineer

ZooxFoster City, CA

Design and build cloud backend microservices for reliable robot-to-cloud communication, fleet management, and telemetry. Requires 4+ years experience and proficiency in TypeScript, Java, or Python.

153k – 230k
Hybrid4+ YOEBackend Engineering
Applied Intuition

Software Engineer - Backend

Applied IntuitionSunnyvale, CA

Builds scalable backend services, APIs, and data pipelines for remote assistance platform enabling real-time communication with autonomous vehicles. Requires 3+ years experience with Go/Python, AWS, Kubernetes, and distributed systems.

153k – 222k
On-site3+ YOEBackend Engineering
Caremessage

Software Engineer II, L2 Integrations Team

CaremessageUnited States

Builds and maintains secure API-to-API integrations, database connections, and FHIR/HL7 workflows with EHR systems like Epic. Requires 3+ years backend experience with JavaScript, strong fundamentals, and remote collaboration skills in healthcare interoperability.

153k – 153k
Remote3+ YOEBackend Engineering
Brex

Software Engineer II, Product

BrexNew York, NY +2

Builds end-to-end backend and full-stack features for financial products, collaborating cross-functionally to enhance customer banking experiences. Requires 4+ years experience in designing, developing, and deploying applications with high engineering standards.

152k – 190k
Hybrid4+ YOEBackend Engineering