Senior Mobile Engineer, Real-Time Trading UI (Hybrid/Remote)

Sierra Ventures; Miami (FL); Hybrid; USD 140,000 - 200,000; Full time

Benefits offered by this job

Competitive starting pay

Discretionary annual bonus

New hire equity grant

Comprehensive health plans

401K with company matching

Paid Parental Leave

Flexible time off

Job summary

Gemini is seeking a Senior Mobile Engineer for the Predictions team to own the mobile trading experience in a React Native app. You will implement market browsing, order entry, and portfolio views, while ensuring real-time data flows and cross-team collaboration with product, design, and compliance.

You will work on contract types like binary, range, and combo, focusing on activation and retention for a fast-growing product line with strong UX considerations and auditability in a regulated

Qualifications

• 6+ years of software engineering experience with mobile apps.
• 4+ years building production mobile applications with React Native.

Responsibilities

• Build and maintain the Predictions mobile trading experience end-to-end: market browsing, order placement, portfolio views, and settlement flows.
• Architect real-time UI for streaming market data using React Native patterns (TurboModules, JSI, native navigator integration).
• Collaborate with backend engineers on gRPC and WebSocket integrations powering live trading surfaces.
• Create reusable, well-tested UI components shared across Predictions and Gemini mobile app.

Skills

React Native

TypeScript

Real-time UIs

UI/UX collaboration

Testing (unit/integration)

Tools

Expo

EAS

Swift/Kotlin

gRPC/WebSockets

Job description

Gemini is seeking a Senior Mobile Engineer for the Predictions team to own the mobile trading experience in a React Native app. You will implement market browsing, order entry, and portfolio views, while ensuring real-time data flows and cross-team collaboration with product, design, and compliance.

You will work on contract types like binary, range, and combo, focusing on activation and retention for a fast-growing product line with strong UX considerations and auditability in a regulated