Calling All Upstarters!

SENIOR MOBILE DEVELOPER WANTED!

Upstart13 is a US-based company of daring people building legendary software, products, and services for companies worldwide, on their terms. We are not the typical offshore company. Companies choose us for several reasons including our incredible people and our consultative approach. We’re all about delivering value and doing big things. We have become a game-changer for teams around the world who look to Upstart’s services as a differentiator.

Job Description:

We are looking for an experienced Senior Mobile Developer based in LATAM with deep expertise in React Native to build, maintain, and deploy high-performance mobile applications.

You will be responsible for migrating and modernizing an existing mobile codebase into a more scalable, maintainable structure using React Native. This is a fast-paced, delivery-oriented role for someone who takes full ownership of the mobile app lifecycle including building, testing, and deploying apps to both the Google Play Store and the Apple App Store.

A strong background in offline-first mobile development using Realm, PouchDB, WatermelonDB, or similar is required to ensure reliability in environments with limited or no connectivity.

Responsibilities:

• Work on an existing mobile application, migrating and restructuring the React Native codebase to improve performance, scalability, and maintainability.
• Build, package, and deploy React Native apps to both the Apple App Store and Google Play Store.
• Implement and maintain offline-first features using tools such as Realm, PouchDB, or similar solutions.
• Diagnose, debug, and fix production issues across multiple platforms.
• Optimize app startup time, rendering performance, and resource usage.
• Implement best practices for state management, component reuse, and UI consistency.
• Ensure app stability, high performance, and smooth user experiences across devices.
• Write clear, maintainable, and well-documented code, following React Native and mobile development best practices.
• Participate in agile sprints, delivering results quickly and iteratively with minimal supervision.
• Contribute to an AI-enabled culture by adopting, experimenting with, and improving AI-assisted workflows.

Technical skills:

• 4+ years of professional experience in mobile development, focused on React Native.
• Deep understanding of React Native internals, architecture, and ecosystem.
• Proven experience with offline-first development using tools such as Realm, PouchDB, or WatermelonDB.
• Strong knowledge of JavaScript and TypeScript.
• Hands-on experience deploying apps to Google Play Store and Apple App Store.
• Understanding of Android and iOS build processes (Gradle, Xcode, certificates, provisioning profiles, signing, etc.).
• Experience with REST APIs and local data caching.
• Skilled in debugging, profiling, and performance optimization of React Native applications.
• Proficient with Git and familiar with CI/CD pipelines for mobile applications.
• Experience writing and maintaining unit and integration tests (Jest, Mocha, Detox, etc.).

Soft skills:

• Strong ownership mindset with the ability to work independently and deliver results.
• Fast-paced, delivery-driven approach to problem-solving.
• Excellent communication skills and ability to explain technical details clearly.
• Proactive, adaptable, and comfortable working in evolving codebases.
• Attention to detail and commitment to writing reliable, maintainable code.

Bonus skills: 

• Familiarity with GraphQL and Apollo Client.
• Knowledge of native module bridging in React Native.
• Experience with data synchronization strategies in offline-first architectures.

Why Upstart13?

• We put people first at Upstart 13! We believe the world is filled with amazing people and we are willing to go to great lengths to seek out others who share our values to join our cause of bringing down borders in technology for people everywhere.
• We develop leaders at Upstart 13, we focus on what matters to do meaningful work, we own our shit, we stay curious, and we understand responsibility leads to giving. We do big things, together!

Perks:

• Job type: long-term, full-time job.
• Fully remote.
• USD competitive salary.
• 20+ Paid time off days.

Are you ready to join our cause? Be sure to ask, “why 13?”