Senior Software Engineer, Predictions (Mobile)

About the role

The Role: Senior Software Engineer (Mobile)

Responsibilities

• Build and maintain the Predictions mobile trading experience end-to-end: market browsing, order placement, portfolio views, and settlement flows.
• Arcitect performant, real-time UI for streaming market data (orderbook, price charts, position P&L) using modern React Native patterns (TurboModules, JSI, native navigator integration).
• Collaborate with backend engineers on gRPC and WebSocket integrations that power live trading surfaces.
• Create reusable, well-tested UI components shared across Predictions and the broader Gemini mobile app.
• 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.
• Scope and implement solutions independently, making informed architecture decisions and tradeoffs around native vs. JS boundaries.
• Establish and improve mobile development processes — testing strategy, release quality gates, OTA vs. native release decisions.
• Conduct thorough code reviews and mentor other engineers on React Native best practices.
• Use analytics and experimentation data to inform product and engineering decisions around activation funnels, onboarding, and trading engagement.

Minimum Qualifications

• 6+ years of software engineering experience, including 4+ years building production mobile applications with React Native.
• Strong proficiency in TypeScript.
• Deep understanding of React Native internals — bridging, native modules, performance profiling, and debugging.
• Experience building real-time, data-intensive UIs (trading, dashboards, live feeds).
• Strong UX/UI sensibility with a track record of contributing to design and product decisions, not just implementing specs.
• Expertise in unit and integration testing for mobile.
• Comfort working in a regulated environment where changes require rigor and auditability.

Preferred Qualifications

• Experience with financial or trading applications (orderbooks, charting, position management).
• Familiarity with Expo, EAS, and OTA update strategies.
• Experience with native module authoring (Swift/Kotlin) or SwiftUI/Jetpack Compose embedding via Expo Modules API.
• Exposure to gRPC, WebSockets, or similar real-time transport protocols.
• Experience with performance analysis tooling (Flipper, React DevTools profiler, native instruments).
• Prior work at a fintech, exchange, or other regulated product environment.