Senior Mobile Engineer (React Native & Native Integration)Woliba • New York, New York, United States
Senior Mobile Engineer (React Native & Native Integration)
Woliba
- New York, New York, United States
- New York, New York, United States
About
The Opportunity We are looking for a Senior Mobile Engineer to lead our transition into a hybrid mobile environment. Instead of a "greenfield" rewrite, you will be the architect responsible for embedding React Native into our existing, high-performance native iOS (Swift) and Android (Kotlin) apps. Your goal is to enable efficient cross‑platform development for future modules (like Rewards and Community) while maintaining the integrity of our native core.
Why Woliba? (Our Culture)
True Work‑Life Balance: It’s in our name. We prioritize the mental and physical well‑being of our team.
Fully Remote: We empower our team to work from where they are most productive, ensuring you have the flexibility to thrive both personally and professionally.
Impact: You will be the point person for a major architectural shift at a scaling company, influencing our technical roadmap for years to come.
Key Responsibilities
Architect the "Brownfield" Bridge: Lead the technical integration of React Native into existing Swift and Kotlin codebases.
Cross‑Platform Delivery: Build and deploy new, high‑complexity features once for both iOS and Android.
Auth & State Synchronization: Implement secure, real‑time data sharing between native storage (Keychain/SharedPrefs) and the React Native engine.
Performance Engineering: Manage engine startup times (Hermes/Turbo Modules) to ensure transitions feel native and snappy.
Native Module Development: Write custom Native Modules in Swift/Kotlin when React Native needs to access deep device features.
CI/CD Leadership: Update build pipelines to handle the dual nature of the app (npm alongside CocoaPods and Gradle).
Technical Requirements
5+ Years of Mobile Experience: A deep background in mobile‑first development.
React Native Expertise: Advanced knowledge of React Native internals (The Bridge, JSI, and the New Architecture).
Native Foundations: Proficiency in Swift/Objective‑C and Kotlin/Java. You must be comfortable navigating a 100% native project.
Hybrid Experience: Proven track record of "Brownfield" integration (adding RN to existing native apps).
Security: Experience with OAuth, JWT, and securing sensitive data across hybrid environments.
Bonus Points
Experience in HR Tech or Wellness.
Experience with Expo Modules in a brownfield context.
A passion for high‑fidelity UI/UX and creating "invisible" transitions between platforms.
At Woliba, we are not building from scratch; we are embedding React Native into existing, mature Swift and Kotlin apps. Please describe a time you integrated React Native into an existing native codebase. What were the biggest challenges you faced with the "Bridge" or build synchronization (e.g., CocoaPods/Gradle), and how did you resolve them?
Our platform handles sensitive employee data. How have you previously handled passing authentication tokens or sensitive state from a native shell into a React Native module? Specifically, how do you ensure data consistency and security when the 'Source of Truth' lives in the native layer (Keychain/SharedPrefs)?
User experience is core to our mission of Work‑Life Balance. When embedding React Native screens inside a native app, there is often a "startup lag" or transition friction. What specific strategies do you use to "warm up" the React engine or optimize bridge performance to ensure the user perceives the app as 100% native?
#J-18808-Ljbffr
Languages
- English
Notice for Users
This job comes from a TieTalent partner platform. Click "Apply Now" to submit your application directly on their site.