React Native Engineer (f/m/d)

About ITRex THE PLACE ITRex - AI pioneers who build systems that actually work in the real world, not just in demos. We're 250+ people spread across the US and Europe, creating solutions for companies like Procter & Gamble 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. THE ROLE We are looking for a React Native engineer to build a self-custody crypto wallet for a major stablecoin company: wallet creation and recovery, transaction signing, secure key storage, WalletConnect and EVM integrations. Keys are generated and kept on the user’s own device, in code already distributed through the app stores - security and performance of the mobile layer are part of every feature, not a polishing step before release. You will work day to day with Product, Design and Backend, and directly with external SDK vendors and third-party providers on integrations. Fully remote, long-term. Our Expectations React Native & Mobile Development 3+ years of experience in mobile development with a focus on React Native. 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. 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. 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. 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 … mais Pesquise vagas mais rápido com Premium Acesse informações sobre empresas, como prioridades estratégicas, tendências de número de funcionários e muito mais Jonatas e outros milhões de usuários têm contas Premium Reative o Premium Aproveite o suporte 24 horas e cancele quando quiser. Sobre a empresa ITRex Group 8.912 seguidores Seguir Desenvolvimento de software • 201-500 funcionários • 190 no LinkedIn ITRex is an AI consulting and implementation company that builds systems meant to work in the real world, at scale, and under pressure. Generative AI is a core focus, but our expertise spans the full AI and data stack — from classical machine learning and computer vision to autonomous agents and data infrastructure. Our solutions aren’t just prototypes. They're built to integrate, scale, and deliver. Leaders come to us to explore what’s possible — and then make it real. Gen AI Solution Development & De