Mobile Engineer III

Location: Northern

# Remote Mobile Engineer III Job at TopstepUSA5 hours agoFull TimeUSA $132000 - $168000 USDJava Script Type Script React Graph QLPostgreSQLSQLCI/CDKotlin Swift Java RESTDesign Systems“When applying, mention the word Far Coder to show you’ve read the job post completely. Employers can look for these words to identify genuine, thoughtful applicants and avoid spam.”## Job Overview Topstep is hiring a remote candidate for Mobile Engineer III.

This is a full time position.

Work location:

USA.The role typically involves technologies such as JavaScript, Type Script, React, GraphQL, PostgreSQL, SQL.This role involves building user interfaces using technologies such as React.##

Key Responsibilities
* Contribute to 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.
* Establish engineering patterns for React Native development, including reusable components, custom hooks, Type Script patterns, and testing strategies that other engineers can adopt.
* Contribute to 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.
* Contribute to 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.
* Uphold 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.## Required Skills### Primary Skills
* JavaScript* Type Script
* React* GraphQL
* PostgreSQL* SQL### Secondary Skills
* CI/CD
* Kotlin* Swift
* Java* REST
* Design Systems Skills required for this role include JavaScript, Type Script, React, and related tools for day-to-day development.## Job Details
* *
* Employment Type:

** Full Time
* *
* Location:

** USA
* ** Salary:** $132000 – $168000 USD## Tech Stack Java Script , Type Script, React, GraphQL, PostgreSQL, SQL, CI/CD, Kotlin, Swift, Java, REST, Design Systems## Role details
** Summary
* * Are you a mobile engineer who thrives on building exceptional user experiences, shipping high-quality apps from scratch, and raising the technical bar for teams around you?

As a
** Mobile Engineer III
** at Topstep, you'll play a foundational role in building our mobile trading platform using React Native. You'll be instrumental in launching our MVP, establishing mobile architecture patterns, and then embedding within feature teams to drive ongoing mobile development. This is an opportunity to shape the mobile experience for traders and set the technical foundation that will scale across both our trader experience and trading experience platforms.

This role is ideal for someone who brings both deep React Native expertise and a product mindset. Someone who's excited to own the mobile app end-to-end, establish reusable patterns and components that scale across teams, and work with a team who is building the next generation of our mobile platform. Join us and help define what mobile excellence looks like at Topstep.
** Key Responsibilities
**** Required Qualifications and Key Competencies
*** 3 + years of professional experience building production mobile applications, with demonstrated impact in 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 Type Script 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…