Senior React Native Engineer

New

ITRexMobile applications

Poland. Serbia. Romania. UkraineFull-TimeSenior

Salary not disclosed

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Job Details

Languages: English: Upper-Intermediate or higher.
Experience: 5+ years of experience in mobile development with a focus on React Native.
Required Skills: AndroidReact NativeTypeScriptUnit TestingiOS

Have 5+ years of mobile development experience focused on React Native.
Understand React Native architecture; exposure to Fabric and TurboModules is preferred.
Have experience architecting, building, and maintaining high-performance, scalable mobile applications.
Be skilled in application performance optimization, debugging, and profiling.
Have strong TypeScript knowledge and experience enforcing strict typing practices.
Have experience publishing and maintaining apps in the App Store and Google Play.
Be experienced in identifying and resolving application bottlenecks and performance issues.
Have experience building and maintaining unit, integration, and E2E testing strategies.
Understand mobile security, secure data storage, and anti-fraud mechanisms.
Be able to research and evaluate technologies and make informed decisions in fast-paced environments.
Have English proficiency at Upper-Intermediate level or higher.
Nice to have: crypto or blockchain development experience, including wallets, signing, or transactions.
Nice to have: knowledge of WalletConnect, EVM networks, RPC, smart contract interaction, secure key storage, cryptography, ERC standards, and token metadata.

Architect, build, and maintain high-performance React Native applications for iOS and Android.
Collaborate with Product, Design, and Backend teams to define requirements and deliver features.
Work with external partners, including banks, SDK vendors, and third-party providers, on integrations and technical alignment.
Integrate and maintain third-party SDKs, native modules, and Web3/crypto libraries.
Implement wallet features, signing, and smart contract interactions.
Protect sensitive data, including private keys and seed phrases, and apply mobile security best practices.
Identify and resolve performance bottlenecks, defects, and reliability issues.
Implement and maintain unit, integration, and E2E test coverage.
Work with CI/CD pipelines for automated builds, testing, and deployment.
Research and introduce technologies and best practices throughout the application development lifecycle.

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