Senior Software Engineer, Predictions (Mobile) at Gemini Trust Co.

<p><strong>About the Company</strong></p> <p>Gemini is a global crypto and Web3 platform founded by Cameron and Tyler Winklevoss in 2014, offering a wide range of simple, reliable, and secure crypto products and services to individuals and institutions in over 70 countries. Our mission is to unlock the next era of financial, creative, and personal freedom by providing trusted access to the decentralized future. We envision a world where crypto reshapes the global financial system, internet, and money to create greater choice, independence, and opportunity for all — bridging traditional finance with the emerging cryptoeconomy in a way that is more open, fair, and secure. As a publicly traded company, Gemini is poised to accelerate this vision with greater scale, reach, and impact.</p> <p><span style="font-weight: 400;"><strong>The Department: Predictions</strong></span></p> <p><span style="font-weight: 400;"><strong>The Role: Senior Software Engineer (Mobile)</strong></span></p> <p>As a Senior Mobile Engineer on the Predictions team, you'll own the mobile experience for Gemini's CFTC-regulated prediction markets exchange. You'll build and ship trading interfaces for event contracts — from order entry and position management to real-time market data — within Gemini's React Native app. You'll work closely with product, design, backend, and compliance to bring new contract types (binary, range, combo) to market on mobile and drive activation and retention for a fast-growing product line.</p> <p><span style="font-weight: 400;"><em>This role is required to be in person twice a week at our New York City, NY office.</em></span></p> <p><span style="font-weight: 400;"><strong>Responsibilities:</strong></span></p> <ul> <li>Build and maintain the Predictions mobile trading experience end-to-end: market browsing, order placement, portfolio views, and settlement flows. </li> <li>Architect performant, real-time UI for streaming market data (orderbook, price charts, position P&L) using modern React Native patterns (TurboModules, JSI, native navigator integration).</li> <li>Collaborate with backend engineers on gRPC and WebSocket integrations that power live trading surfaces. </li> <li>Create reusable, well-tested UI components shared across Predictions and the broader Gemini mobile app.</li> <li>Partner with product and design to shape mobile-specific UX for new contract categories (weather, economics, crypto, sports) and features like combo contracts and range contracts.</li> <li>Scope and implement solutions independently, making informed architecture decisions and tradeof