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 Description

As 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.

Responsibilities

• Feature 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 (<100 ms) and maintain ≤1 % production error rates; participate in front-end on-call rotation and triage issues within 15 minutes.

• Cross-Functional Collaboration: Work closely with Backend, Product, Design, and Data teams to unblock dependencies, align on API contracts, and champion a data-driven development process.

• Mentorship & Best Practices: Lead code reviews, pair-programming sessions, and knowledge-sharing Dojos to elevate front-end excellence across the team.

Qualifications

• 7+ Years of Frontend Experience:

  • building production React applications (web and/or React Native) in high-velocity environments (fintech, consumer apps, SaaS).

  • Proven track record shipping A/B-tested, feature-flagged interfaces and rapidly iterating based on metrics.

• Technical Skills:

  • Advanced React and React Native proficiency, including hooks, context, and performance optimization techniques.

  • Hands-on experience with feature-flag platforms or custom A/B frameworks.

  • Strong background in TypeScript, component-driven development, and design-system architecture.

  • Expertise in front-end performance tuning: code-splitting, lazy loading, memoization, and build-time optimizations.

  • Instrumentation and observability skills: integrating with Segment, Mixpanel, Amplitude, or similar for real-time analytics.

  • Proficiency with testing frameworks (Jest, Cypress, React Testing Library) and CI/CD pipelines for front-end delivery.

• Soft Skills:

  • Data-driven mindset: formulates clear UI hypotheses, measures impact, and iterates quickly.

  • Excellent communicator and collaborator: thrives in cross-functional teams and handles shifting priorities with grace.

  • Strong ownership and bias for action: comfortable shipping code, monitoring its impact, and refining based on data.

  • Mentorship orientation: eager to coach IC3-level peers through design reviews and pair-programming.

• Nice-to-Haves:

  • Prior experience in crypto wallets, payments, or referral/incentive programs.

  • Contributions to open-source front-end libraries or published talks on growth engineering.

  • Familiarity with mobile push-notification SDKs and deep-link handling.

Why Work with Us

Opportunity

We are a team of experienced builders in the blockchain and crypto industry. Our journey began from use