Staff Android Software Engineer, Cash App Consumer Platform

Cash App is a financial technology company that aims to redefine the world's relationship with money by providing innovative financial products. The Staff Android Engineer will build and own the Android platform, evolve AI-native engineering practices, and drive organizational impact by collaborating across teams to enhance the developer experience and product quality.

Responsibilities:

• Own and evolve foundational Android infrastructure: modularization, dependency injection, navigation, deep linking, and app lifecycle systems
• Design and deliver shared libraries and frameworks that feature teams rely on daily with developer and AI ergonomics as a first-class concern
• Drive Cash App's Android architecture forward, making high-leverage decisions that compound over time
• Invent thoughtful Android platform tech and open source it where it creates value for the broader community
• Develop and steward rapid experimentation in support of the fast iteration enabled by the AI world
• Build upon observability and performance tooling that gives engineers and on-callers clarity and confidence
• Partner with iOS, Web, and backend engineers to deliver consistent, high-quality cross-platform experiences
• Evolve how Cash App's Android engineering org uses AI
• Proactively identify where AI creates real leverage in platform and product engineering workflows, and act on it
• Introduce and evaluate emerging AI development tools (Claude Code, GPT/Codex, Goose, and what comes next), forming a clear point of view on adoption
• Build AI-powered capabilities into the platform itself where they create durable value for product teams
• Operate beyond your immediate team. Identify cross-cutting technical problems across Cash App's Android org and mobilize the resources to address them
• Surface unknown risks and systemic issues before they become customer problems or engineering crises
• Lead architecture and design reviews across team boundaries - help set standards that scale
• Mentor and grow engineers at all levels, raising the technical ceiling of the Android community at Cash App
• Partner with engineers, product managers, and designers across Cash App to align platform investments with what teams actually need
• Represent Android platform needs in cross-functional, cross-org, and Block-wide technical discussions
• Communicate complex technical tradeoffs with clarity to engineers, product partners, and leadership alike

Requirements:

• Platform or infrastructure builder's mindset. You've built systems for engineers as your customers, and you care deeply about developer experience
• A high agency mindset - if you see a problem you take the initiative to find a solution
• 10+ years of Android development experience with a demonstrated track record of impact at organizational scope
• BA/BS degree in Computer Science or equivalent practical experience
• Proven organizational leadership. You've driven large-scale technical initiatives across multiple teams and left systems meaningfully better
• AI-native development practice - You actively use AI-assisted development tools and have a strong, evolving point of view on where AI creates real leverage in engineering - and where it falls short
• Strong systems thinking - You identify non-obvious problems and design solutions that are simple enough to be right
• Exceptional communication - crisp design docs, productive design reviews, and the ability to build alignment across senior engineers and non-engineers alike
• Deep Android expertise - Kotlin, Jetpack Compose, modern architecture patterns, build systems, performance profiling, and testing at scale
• Experience building developer platforms, shared libraries, or internal tooling used across large engineering organizations
• Experience with Kotlin Multiplatform
• Background in fintech, financial services, or other high-trust regulated environments
• Experience with mobile experimentation infrastructure, feature flagging, or A/B testing at scale
• A track record of identifying and naming problems that weren't yet on anyone's roadmap