THE PLACE
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.
THE PEOPLE
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.
We are looking for Senior React Native Engineer to join our team!
Your 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, 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.
- Participate in the full application development lifecycle, from initial concept to production deployment.
Requirements
Our Expectations
React Native & Mobile Development
- 5+ years of experience in mobile development with a focus on React Native.
- Deep understanding of React Native architecture, preferably also exposure to 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.
Processes
- 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.
Nice to have:
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
Benefits
What We Offer
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
5+ years mobile development with React Native; deep understanding of React Native architecture, TypeScript, performance optimization, testing strategies, mobile security, and English Upper-Intermediate or higher.
Key Responsibilities
- architecting mobile applications
- integrating third-party SDKs
- implementing Web3 functionality
Skills & Tools
React Native, TypeScript, Fabric, TurboModules, App Store, Google Play, WalletConnect, EVM, RPC, CI/CD
Job Details
- Category: Software Development
- Seniority: Senior Level
- Commitment: Full Time
- Workplace: Remote — Ukraine
- Languages: English
About ITRex Group
An AI and software development company building real-world systems for clients like P&G and Shutterstock. — Industry: Information Technology