Senior Mobile Engineer - Real-Time Trading (Predictions)

Gemini; United States; Hybrid; USD 140,000 - 200,000; Full time

Benefits offered by this job

Competitive starting pay

Discretionary annual bonus

Equity grant (new hire)

Comprehensive health plans

401K with company matching

Paid Parental Leave

Flexible time off

Job summary

Gemini is seeking a Senior Software Engineer (Mobile) to own the mobile trading experience for the Predictions team. You will ship contract-based interfaces (binary, range, combo) in Gemini's React Native app, collaborating with product, design, backend, and compliance to move fast in a regulated crypto environment.

You’ll build end-to-end features, partner on gRPC and WebSocket integrations, and mentor others in React Native best practices while shaping mobile UX for new contract types and

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, debugging.
• 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.

Responsibilities

• Build and maintain the Predictions mobile trading experience end-to-end: market browsing, order placement, portfolio views, and settlement flows.
• 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.

Skills

React Native

TypeScript

RN internals

UX/UI design

Testing (mobile)

Regulated environment

Expo

EAS

OTA updates

Swift/Kotlin

SwiftUI/Jetpack Compose

gRPC

WebSockets

Flipper

React DevTools

Tools

Expo

EAS

OTA updates

Swift/Kotlin

SwiftUI/Jetpack Compose

gRPC

WebSockets

Flipper

React DevTools

Job description

Gemini is seeking a Senior Software Engineer (Mobile) to own the mobile trading experience for the Predictions team. You will ship contract-based interfaces (binary, range, combo) in Gemini's React Native app, collaborating with product, design, backend, and compliance to move fast in a regulated crypto environment.

You’ll build end-to-end features, partner on gRPC and WebSocket integrations, and mentor others in React Native best practices while shaping mobile UX for new contract types and