Staff iOS Engineer - Real-Time Trading (Remote)

High Roller Technologies; United States; On-site; USD 180,000 - 240,000; Full time

Job summary

Rolr is seeking a Staff-level iOS Engineer on contract to deliver the iOS experience for our prediction markets platform. You’ll work across React Native and Swift with the CPO and partner engineers to ship regulated finance-category consumer apps through App Store approval.

Remote work is available for candidates in the US or EU. This senior, hands-on role requires immediate start and full-time engagement with potential future extensions.

Qualifications

• 8+ years of professional iOS engineering with shipped consumer apps.
• Experience taking multiple apps through App Store review, preferably finance/trading.
• Strong Swift experience (SwiftUI & UIKit) and production React Native.
• Performance-focused, with profiling, animation timing and memory management.
• Experience with mobile design systems and component libraries.

Responsibilities

• Design and build the iOS interaction layer across React Native and Swift.
• Own App Store submission strategy, guideline compliance, TestFlight, and rollout.
• Build real-time trading interfaces that perform under live market conditions.
• Develop native Swift modules where React Native falls short, including charts.
• Contribute to the native design-system components and platform integrations.
• Implement authentication flows (OAuth2/OpenID, passkeys, biometrics).
• Improve app performance including cold start, frame time, and memory usage.
• Support localization, gating, and multi-market functionality.
• Review internal and partner-engineer work to high standards.

Skills

iOS engineering

Swift

SwiftUI

UIKit

React Native

App Store submission

Performance optimization

Regulated apps

Fintech/trading

Tools

Keycloak

OIDC

Passkeys

Job description

Rolr is seeking a Staff-level iOS Engineer on contract to deliver the iOS experience for our prediction markets platform. You’ll work across React Native and Swift with the CPO and partner engineers to ship regulated finance-category consumer apps through App Store approval.

Remote work is available for candidates in the US or EU. This senior, hands-on role requires immediate start and full-time engagement with potential future extensions.