Staff Mobile Engineer

November 14

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Topstep

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Finance • Fintech • B2B

Topstep is a company that provides a platform for futures traders to develop their skills and potentially earn funding through their unique Trading Combine program. The program allows traders to demonstrate their abilities in a simulated trading environment, and those who meet the criteria can unlock a funded trading account within a short period. With over 10,000 traders and support features like coaching, community engagement, and educational resources, Topstep aims to help individuals become successful traders while minimizing their financial risk.

51 - 200 employees

Founded 2012

💸 Finance

💳 Fintech

🤝 B2B

📋 Description

• Lead the mobile MVP effort to establish our React Native application from the ground up, integrating with GraphQL APIs across our trader experience and trading experience platforms • Set technical direction for mobile architecture, influencing component design, state management, API integration patterns, and navigation structure • Establish engineering patterns for React Native development including reusable components, custom hooks, TypeScript patterns, and testing strategies that other engineers can adopt • Own end-to-end mobile features from design through App Store and Play Store releases, ensuring seamless integration with backend services and optimal performance • Partner with product and design to translate trader needs into mobile experiences that balance user experience with technical constraints and platform capabilities • Drive mobile quality and performance by embedding testing, monitoring, crash reporting, and performance optimization into every feature you ship • Embed within feature teams after MVP launch to drive ongoing mobile development, bringing mobile expertise to cross-functional squads • Mentor engineers on React Native best practices, mobile-specific architectural thinking, and production ownership • Champion mobile-first thinking across the organization, helping backend and frontend teams understand mobile constraints and opportunities

🎯 Requirements

• 7+ years of professional experience building production mobile applications, with demonstrated impact establishing patterns and practices that scaled across multiple teams • Deep React Native expertise including navigation (React Navigation), state management (Redux, Zustand, Context), native module integration, and performance optimization • Strong TypeScript and modern JavaScript foundation with understanding of React patterns, hooks, component composition, and functional programming concepts • Cross-platform mobile development experience shipping apps to both iOS App Store and Google Play Store, including understanding of platform-specific differences and capabilities • GraphQL client integration experience using Apollo Client or similar libraries, including cache management, optimistic updates, and error handling • Mobile-specific performance optimization including understanding of bundle size, startup time, memory management, list virtualization, and image optimization • Production mobile app experience including crash reporting (Sentry, Crashlytics), analytics integration, remote config, and debugging production issues • Testing mindset with experience writing unit tests (Jest), integration tests, and E2E tests (Detox, Appium) for React Native applications • Understanding of mobile CI/CD including automated builds, code signing, TestFlight/Play Store distribution, and release management • Track record of technical leadership through architectural documentation, code reviews, component libraries, and establishing mobile engineering standards • Excellent communication skills with the ability to explain mobile-specific constraints and trade-offs to varied audiences and build consensus across teams • Comfortable making pragmatic decisions balancing long-term mobile architecture with immediate feature delivery and MVP launch goals.

🏖️ Benefits

• 10 Company paid Holidays and generous Family Leave. Paid time off is accrued monthly. • Competitive 401(k) matching, health, dental, and vision insurance is offered for full time employees • Vacations are encouraged with a bonus for taking 5 consecutive days. Employee referrals are bonused. Topstep offers a food and groceries budget and contributes towards health and wellness.