Summary
PRYPCO is seeking a Senior Full Stack Engineer to lead development of its iOS and Android applications using React Native and Expo, while contributing to its web frontend. The role covers mobile architecture, performance, native integrations, app releases, testing, and app store operations. The engineer will collaborate with Product, Design, and Backend teams, contribute to web development with Angular or React, and mentor other engineers. Applicants need 6+ years of mobile engineering experience, including 4+ years with React Native and Expo in production.
The posting
As published on prypco.com. Pulled from the employer's site and shown as they wrote it.
About the Role
We are seeking a highly experienced Senior Software Engineer with 6+ years of proven expertise architecting and shipping production React Native applications, and hands-on command of the Expo ecosystem including EAS. This role is primarily mobile: you will own our iOS and Android apps end to end - architecture, performance, release management, and app store operations - while also contributing to our web frontend (Angular and/or React) as needed. You will be a key member of the engineering team, and mentoring engineers.
Key Responsibilities
Mobile
Architect and build scalable, performant mobile applications using React Native and Expo, including apps with custom native modules or native code where required
Own the full mobile release lifecycle: EAS builds, OTA updates, app store submission and compliance (App Store / Google Play), versioning strategy, and rollout/rollback processes
Debug and resolve complex native-layer issues — performance, memory, platform-specific bugs, native module bridging (Android/Java, iOS/Swift or Objective-C)
Design mobile app architecture, navigation, and state management (Redux, Zustand, Recoil, or similar) for scale and maintainability
Set and enforce mobile engineering standards: testing frameworks, CI/CD pipelines for mobile builds, code review practices
Integrate analytics/observability tooling (Amplitude, Sentry, Google Analytics) into mobile apps to monitor app health and user behavior
Mentor engineers on mobile architecture, native debugging, and release best practices
Web
Contribute to and maintain our web frontend using Angular and/or React.js, working from design specifications with reusable, well-architected components
Support frontend performance efforts (Core Web Vitals, Lighthouse) as needed
Use Storybook to collaborate with design and product functions
Cross-Platform / Shared
Work closely with Product and Design teams to deliver the best end-user experience across mobile and web
Collaborate with the Backend team on API design; evaluate and integrate third-party APIs and services
Ensure high-quality unit/integration test coverage using appropriate mobile and web testing frameworks
Participate in code reviews across the mobile and web codebases
Contribute to agile processes and the technical roadmap for mobile and frontend services
Stay current with emerging mobile and frontend technologies and recommend tooling/practice improvements
Must Have
6+ years of mobile engineering experience, with 4+ years hands-on production React Native and Expo (including EAS for builds, OTA updates, and deployment)
Demonstrated ownership of mobile app architecture, native module integration/bridging, and app store release management
Strong understanding of mobile performance, navigation, and state management (Redux, Zustand, Recoil, or similar)
Working proficiency in at least one of Angular or React.js for web contributions
Strong knowledge of JavaScript/TypeScript and modern ES6+ features
Experience with CI/CD tools and mobile testing frameworks
Experience with Firebase, GraphQL, or REST APIs
Strong leadership skills with the ability to mentor and guide developers
Excellent communication and collaboration skills
Experience working in Agile/Scrum environments
Good to Have
Previously worked in the fintech/proptech industry
Deep experience in both Angular and React.js for web
Prior native iOS or Android development experience (Swift/Objective-C or Kotlin/Java) predating React Native
Previous experience in a startup or fast-paced product environment
Experience with SSR, SPA implementation on the web side
Knowledge of additional programming languages or frameworks