Fullstack Developer, React Native

Believe

. Design, build, and maintain cross-platform mobile applications using React Native for iOS and Android .

Posted 11/7/2026full-timeRemote • New York • United StatesMid-LevelSenior💰 $120,000 - $135,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and maintaining cross-platform mobile applications using React Native, along with strong proficiency in Ruby on Rails for API development. Capable of providing technical leadership, optimizing app performance, and mentoring engineers in best practices.

Highest-signal resume keywords

React Native DevelopmentRuby on Rails API DevelopmentMobile Application Performance OptimizationTechnical LeadershipUnit and Integration Testing

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

ReactJavaScriptTypeScriptRuby on RailsREST APIsGitCI/CD PipelinesMobile UI/UX PrinciplesReact QueryContext API

Soft Skills

CollaborationMentoringCode Review

Tools & Technologies

App StoreGoogle PlayThird-Party SDKs

Certifications & Qualifications

Bachelor’s Degree in Computer ScienceMaster’s Degree in Computer Science

Industry Keywords

Cross-Platform Mobile ApplicationsProduction CodeMobile Release WorkflowsBackground JobsData Models

Tech Stack

Tools & technologies

AndroidiOSJavaJavaScriptKotlinObjective-CReactReact NativeRubyRuby on RailsSwiftTypeScript

About the role

Key responsibilities & impact

Design, build, and maintain cross-platform mobile applications using React Native for iOS and Android
Build and maintain Rails API endpoints, request/response contracts, background jobs, and data models
Collaborate with product, design, and backend engineers to translate designs and wireframes into reusable full-stack code
Integrate RESTful APIs and third-party SDKs
Optimize app performance, responsiveness, and stability
Write unit and integration tests and shape the mobile testing strategy
Debug and resolve platform-specific issues, including native modules and bridging
Manage App Store and Google Play submissions and release processes
Provide technical leadership on mobile architecture decisions
Set and evolve coding standards and mobile best practices
Conduct code reviews and mentor engineers on technical and career development
Research and recommend tools and technologies to improve team output

Requirements

What you’ll need

6+ years of experience writing production code, including 3+ years building and shipping mobile applications
Strong proficiency in React / React Native and JavaScript/TypeScript
Demonstrated fluency with Ruby on Rails in production, building and maintaining API-only Rails services
Familiarity with React Query and Context API
Experience with Git, CI/CD pipelines, and mobile release workflows
Understanding of mobile UI/UX principles and platform guidelines, including Apple HIG and Material Design
Experience with REST APIs and async data handling
Experience with native iOS (Swift/Objective-C) or Android (Kotlin/Java) is a plus, but not required
Bachelor’s or Master’s degree in Computer Science, or equivalent practical experience

Benefits

Comp & perks

Paid Time Off including vacation, holidays, paid bereavement, unlimited paid sick days, and company-wide week off between Christmas and New Years
“Wellness Fridays” year-round (close at 1pm on Fridays)
Universal Paid Parental Leave for both parents
Comprehensive health, vision, dental, FSA and dependent care from day 1 of employment
401k match
Company wide events, outings and volunteer days
Hybrid Work - employees have the option to work primarily remotely and work from the office 8 days per month on a flexible schedule organized at the department level
Learning and development opportunities and career development training
Free distribution subscription for employees