React Native Engineer

🔥 2 minutes ago

🌐 Poland, Serbia, +2 more countries – Remote

🇵🇱 Poland – Remote 🇷🇸 Serbia – Remote 🇷🇴 Romania – Remote 🇺🇦 Ukraine – Remote

⏰ Full Time

🟡 Mid-level

🟠 Senior

🖥 Software Engineer

👻 Ghost score 10%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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ITRex Group

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2009

🏥 Healthcare

📦 Logistics

🏭 Manufacturing

Healthcare • Logistics • Manufacturing

ITRex Group is a technology consultancy and engineering firm that builds applied AI, generative AI, data platforms, and intelligent edge/IoT solutions for enterprise clients across healthcare, logistics, manufacturing, and other regulated industries. They provide end-to-end services including AI strategy and readiness assessments, product discovery and PoCs, LLM fine-tuning, MLOps/LLMOps and governance, data architecture and platform modernization (warehouses, lakes, vector DBs), and embedded hardware and edge software development. ITRex focuses on production-ready, compliant deployments that integrate models, data infrastructure, and edge devices to deliver scalable, secure AI-driven products and operations.

📋 Description

• 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, including private keys and 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 unit, integration, and E2E test coverage • 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

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

🏖️ Benefits

• Remote flexibility: Work where and how you work best - we trust you to deliver • Competitive salary + benefits that matter (medical, wellness, learning) • 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 • English classes • Professional development • Well-being support • Career progression: Real paths up, not just sideways shuffling • 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 • Regular meetups • Tech talks • Human connections: actual relationships beyond work