React Native Developer

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The opportunity

We are looking for a motivated Mid-to-Senior Developer to join our Technology Consulting team in Serbia. The ideal candidate has around 4 years of experience in mobile application development, with strong expertise in React Native. You will design, develop, and deliver high-quality mobile applications that meet client requirements and provide exceptional user experiences.

We are partnering with a leading client on a major digital transformation initiative. As a React Native Developer, you will play a key role in building a new 100-screen native application for our client. This role requires strong proficiency in cross-platform development and a keen eye for optimizing API integration to deliver a high-performance, enterprise-grade user experience.

You will be part of a 6-person mobile development stream, collaborating closely with our Product Owner, Mobile Tech Lead, and Mulesoft integration team.

Your key responsibilities

Development & Architecture

• Develop, test, and deploy features for the high-performance React Native (iOS and Android) application, ensuring code quality, security, and maintainability.
• Work closely with the Mobile Tech Lead and Solution Architect to define and maintain the application's architecture, component library, and state management solution.
• Implement custom native modules as necessary to access specific device capabilities (e.g., biometrics, advanced camera functions) not available in the standard React Native library.
• Manage the app's build processes, including configuration for different environments, code signing, and release procedures for the Apple App Store and Google Play Store.

API Integration & Quality

• Implement complex data integration logic by consuming Experience APIs (REST/JSON), focusing on optimizing data fetching, caching, and handling asynchronous transactions.
• Collaborate with QA Engineers to ensure high unit and integration test coverage and actively participate in bug fixing during the stabilization phase.
• Ensure cross-platform consistency across different iOS and Android devices, screen sizes, and operating system versions.

Collaboration & Process

• Participate actively in Agile Scrum ceremonies (planning, daily stand-ups, reviews, retrospectives) led by the Scrum Master.
• Partner with the Product Owner to refine user stories, estimate effort accurately, and deliver against sprint commitments.
• Troubleshoot integration issues by working directly with the integration and backend systems development teams.

Skills and attributes for success

• Experience: 3+ years of professional experience in software development, with at least 2+ years dedicated to React Native development (not just web React).
• Technical Proficiency: Expert knowledge of JavaScript/TypeScript, React, and fundamental React Native concepts, including the component lifecycle, Hooks, and native bridging.
• Integration Expertise: Proven experience integrating mobile applications with complex, multiple-layer RESTful APIs, and optimizing the mobile network layer for performance.
• Tooling: Experience with modern mobile development tooling, including CI/CD pipelines (e.g., Azure DevOps, Jenkins, Fastlane), Git, and strong understanding of the native build process for both iOS (Xcode) and Android (Gradle).
• Testing: Experience writing unit tests (Jest) and familiarity with end-to-end testing frameworks (e.g., Appium, Detox).

Ideally, you are also familiar with:

• Familiarity with the API-led connectivity approach or experience consuming APIs built on similar enterprise platforms.
• Experience in the financial or CRM domains.

What we offer you

At EY, we’ll develop you with future-focused skills and equip you with world-class experiences. We’ll empower you in a flexible environment, and fuel you and your extraordinary talents in a diverse and inclusive culture of globally connected teams. Learn more.

Some of the benefits include:

• Vacation days from 21 to 30 days
• Different bonuses/awards (annual performance bonus, ad hoc bonus, referral bonus, marriage/childbirth award, Employee of the Month award, NY gift, etc.)
• Hybrid working model (2 weeks from home, 1 from office)
• Private health insurance or a private pension
• Allocated time for self-development, minimal 40 hours per year
• Paid certification, training, and free access to Udemy, Coursera, Language learning Platform and other

Are you ready to shape your future with confidence? Apply today.

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