Lead React Native Engineer

• Architect, build, and maintain high-performance, scalable React Native applications for iOS and Android.
• Lead and mentor a team of React Native developers, providing technical guidance and conducting code reviews.
• Collaborate with Product, Design, and Backend teams to define requirements and deliver new features.
• Communicate and collaborate with external partners, including banks, SDK vendors, and 3rd-party providers, to support integrations, resolve issues, and ensure technical alignment.
• Integrate and maintain third-party SDKs, native modules, and Web3/crypto libraries.
• Implement Web3 functionality, including wallet features, signing, and smart contract interactions.
• Ensure secure handling of sensitive data (private keys, seed phrases) and enforce mobile security best practices.
• Ensure top-level application performance, responsiveness, and overall app quality.
• Identify and resolve performance bottlenecks, defects, and reliability issues.
• Implement and maintain comprehensive test coverage (unit, integration, E2E).
• Work with CI/CD pipelines to support automated build, testing, and deployment processes.
• Research, evaluate, and introduce new technologies and best practices to improve product quality and development efficiency.
• Maintain clear technical documentation and promote knowledge sharing within the team.
• Participate in the full application development lifecycle, from initial concept to production deployment.

Do you have experience in iOS development?, React Native & Mobile Development

• 5+ years of experience in mobile development with a focus on React Native.
• Deep understanding of React Native architecture, including Fabric and TurboModules.
• Proven ability to architect, build and maintain high-performance, scalable mobile applications.
• Expertise in application performance optimization, debugging, and profiling.
• Strong knowledge of TypeScript and experience enforcing strict typing practices.
• Experience publishing and maintaining apps in App Store and Google Play.

Blockchain & Web3

• Hands-on experience in crypto & blockchain development (crypto wallets, signing, transactions).
• Strong understanding of Web3 technologies: WalletConnect, EVM networks, RPC, smart contract interaction.
• Experience with secure key storage, seed phrase handling, encryption, private key management, and cryptography best practices.
• Experience integrating complex SDKs/APIs, bridging native iOS/Android SDKs, and working with Web3/crypto libraries.
• Understanding of ERC standards and token metadata structures.

Leadership & Processes

• Proven technical leadership experience, including mentoring, code reviews, and architectural guidance.
• Ability to lead and coordinate a team of React Native developers.
• Experience collaborating effectively with Product, Design, and Backend teams to define and deliver features.
• Strong communication skills with the ability to clearly articulate technical decisions.
• Experience working with CI/CD pipelines for mobile applications.
• Ability to manage the full development lifecycle: planning, implementation, testing, and deployment.
• Expertise in identifying, analyzing, and resolving application bottlenecks and performance issues.
• Experience building and maintaining robust testing strategies (unit, integration, E2E).
• Ability to research, evaluate, and introduce new technologies and best practices.
• Strong understanding of mobile security principles, secure data storage, and anti-fraud mechanisms.
• Experience operating in fast-paced environments and making informed decisions under uncertainty.
• English: Upper-Intermediate or higher.

Why people stay

First, the foundation:

• Remote flexibility: Work where and how you work best - we trust you to deliver
• Fair compensation: Competitive salary + benefits that matter (medical, wellness, learning)

Then, the growth:

• Ownership opportunities: See a problem worth solving? Own it. We back smart risks over bureaucratic safety
• AI enhancement: We leverage AI to make you faster and stronger - complementing your abilities, not replacing them
• Learning investment: English classes, professional development, well-being support
• Career progression: Real paths up, not just sideways shuffling

Finally, the people:

• Responsive teammates: No ignored Slacks, no "not my problem" attitudes
• Supportive culture: When you're stuck, people help. When things break, we fix them together
• Human connections: Regular meetups, tech talks, and actual relationships beyond work

ITRex - AI pioneers who build systems that actually work in the real world, not just in demos. We're 200+ people spread across the US and Europe, creating solutions for companies like P&G and Shutterstock. We keep it simple, build it right, and focus on what works.