Frontend Engineer, Growth & Engagement Team
Phantom is revolutionizing the way millions of people interact with the crypto ecosystem. Our self-custodial wallet offers a seamless, unified experience for managing accounts and tokens across Solana, Bitcoin, Ethereum, and Polygon, empowering users with a single, convenient solution. By integrating cutting-edge security features and launching innovative tools for an enhanced personalized user experience, Phantom is able to provide a next-generation, safe and easy to use self-custodial wallet for everyone. This strategy has allowed Phantom to achieve significant milestones including surpassing 16 million MAU’s, reaching #1 in the Google play store finance category, and consistently trending as a Top 50 app across all categories, right next to X, PayPal, Coinbase, and ChatGPT. Role DescriptionAs a key member of our Growth & Engagement squad, you will own the design, implementation, and optimization of user-facing growth features action cards, referral flows, push-notification experiences, Phantom Pro upsells, and onboarding enhancements. You’ll partner with Product, Design, and Backend to turn hypotheses into polished, performant, and A/B-test-ready interfaces, build reusable component libraries, and instrument every feature for real-time analytics and rapid iteration. ResponsibilitiesFeature Development: Ship 2+ end-to-end growth UI features per quarter, each with comprehensive E2E tests, documentation, and performance budgets. Experimentation Enablement: Integrate feature-flags and build rollout controls so PMs can launch, measure, and rollback UI experiments without developer intervention. Component Library & Design System: Create and maintain reusable, theme-able React (and React Native) components that power all growth experiments and ensure visual consistency. Instrumentation & Analytics: Emit structured events (clicks, impressions, variant cohorts) for every feature; collaborate with Data to validate pipelines and dashboards. Performance & Reliability: Optimize first-paint times (