Staff Android Software Engineer, Cash App Consumer Platform

Block is a technology company whose Cash App provides financial products and services designed to make money more accessible. The Staff Android Software Engineer will build and own foundational Android platform infrastructure, drive AI-native development practices, and lead cross-organizational technical initiatives that improve how Cash App engineers build products.

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