Senior Mobile Engineer

This is a fully remote position, open to applicants in United States.

📋 Description

• Contribute to the development of Topstep's mobile MVP using React Native and TypeScript, working with GraphQL APIs to enhance trader and trading experiences.

• Define mobile architectural patterns, create reusable components, and establish engineering best practices.

• Take ownership of mobile features from technical design through to releases on the App Store and Play Store, including monitoring and iterative improvements.

• Collaborate with product and design teams to transform trader requirements into intuitive and accessible user experiences.

• Design for high-frequency real-time updates while ensuring screens remain responsive and information is up-to-date across various devices and network conditions.

• Ensure quality through testing, monitoring, performance optimization, and secure management of trader information.

• Bring mobile expertise to cross-functional feature teams.

• Provide mentorship to engineers through code reviews and collaborative work.

• Advocate for mobile-first strategies throughout the organization.

• Support the production mobile experience, troubleshoot issues, enhance reliability, and participate in agreed-upon support or on-call duties following onboarding.

⛳️ Requirements

• Over 5 years of professional experience in building and deploying production mobile applications, with a strong focus on React Native development.

• Profound expertise in React Native, alongside a robust foundation in TypeScript and modern JavaScript, covering navigation, state management, hooks, and component design.

• Proven experience in delivering applications for both iOS and Android platforms, understanding platform-specific nuances, mobile build and release processes, and app-store distribution.

• Background in integrating GraphQL APIs, including client-side caching, mutations, and effective error handling.

• Experience in enhancing mobile performance and reliability through profiling, secure session management, and resolving production issues.

• Hands-on experience in writing unit, integration, and end-to-end tests for mobile applications.

• Demonstrated history of owning features from conception to completion and assisting fellow engineers with technical decisions, code reviews, reusable components, and mentoring.

• Strong communication skills and practical engineering judgment, including the ability to articulate mobile constraints, foster consensus, and balance long-term architecture with MVP delivery.

• Preferred: Experience with real-time data integration utilizing WebSockets or similar streaming technologies.

• Preferred: Proficiency in native iOS or Android development, particularly at the intersection of React Native and native code.

• Preferred: Familiarity with complex mobile interfaces such as charts, animations, or gesture handling.

• Preferred: Experience with Expo or equivalent React Native tools.

• Preferred: Background in developing trading, financial, or fintech applications.

🏝️ Benefits

• Seven Company-paid Holidays

• Generous Family Leave

• Front-loaded paid time off

• Competitive 401(k) matching

• Health, dental, and vision insurance for full-time employees

• Bonus for taking 5 consecutive vacation days

• Budget for food and groceries

• Contributions towards health and wellness

• Performance-based bonus