Senior React Native Engineer

itrex group • Ukraine

Remote

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AI Summary

Architect and build high-performance, scalable React Native applications for iOS and Android with a focus on Web3 and crypto integrations. Collaborate with cross-functional teams to integrate third-party SDKs, ensure mobile security, and maintain comprehensive test coverage. Requires 5+ years of mobile development experience, strong TypeScript skills, and expertise in performance optimization and CI/CD pipelines.

Key Highlights

5+ years of experience in mobile development with a focus on React Native

Experience with Web3, crypto wallets, and secure key management

Remote-first culture with competitive compensation and professional development support

Key Responsibilities

Architect, build, and maintain high-performance, scalable React Native applications for iOS and Android

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

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

Participate in the full application development lifecycle, from initial concept to production deployment

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Technical Skills Required

React Native TypeScript Mobile Development

Benefits & Perks

Remote flexibility

Competitive salary

Medical and wellness benefits

Learning investment and English classes

Career progression opportunities

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Nice to Have

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

Job Description

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.We're the kind of people who don't ignore messages in Slack, who jump in to help when you're stuck on a problem, and who offer solutions instead of blame when things go sideways. We believe in openness, accountability, and having each other's backs. No office politics, no hidden agendas - just people who care about doing good work together and supporting each other to get there.

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