Senior React Native Engineer

N-iX is looking for a Senior React Native Engineer to join our tight-knit, 6-person Mobile Engineering Team. You will work on a production brownfield React Native codebase embedded within native iOS and Android hosts, managing interconnected internal packages that power high-performance, real-time trading interfaces. In a highly agile setup, you will collaborate closely with the team to deliver a fast, reliable, and fault-tolerant mobile experience where correctness, low latency, and exceptional user experience are paramount. In this role, you will: Develop and ship new features for a high-performance React Native codebase embedded within native iOS and Android hosts. Drive architecture and code quality, leading proofs-of-concept for new patterns, improving developer experience, and ensuring high UI responsiveness for real-time trading. Design and align RESTful API contracts in close collaboration with backend, product, and UX Design Teams. Write reusable, well-tested, and maintainable code, taking full ownership across all stages of the mobile software development lifecycle. Elevate team engineering standards through thorough code reviews, technical mentorship, and active participation in agile planning sessions. Own end-to-end delivery, taking features from concept to production release within your first three months while contributing to overall application architecture. Requirments: 5+ years of proven senior-level experience in building, developing, and scaling React Native applications in a production environment. Solid background in mobile application development, understanding platform-specific nuances across iOS and/or Android. Deep TypeScript mastery, with strong experience navigating strict configurations across large, shared codebases. Hands-on experience in building and optimizing React Native architecture (including native modules, Fabric, TurboModules, Hermes, and the New Architecture). Solid data-fetching and cache-management skills using React Query (v4/v5) to ensure consistent server state across screens. A forward-thinking mindset and enthusiasm for modern tools, including a practical, open approach to leveraging AI-assisted development tools to boost productivity. English level - upper-intermediate Nice to have: Strict testing discipline (Jest, React Native Testing Library) as an integrated part of your development workflow. Hands-on experience with monorepos and internal packages (e.g., Lerna, Nx, npm workspaces). Experience in FinTech, trading platforms, or high-throughput real-time systems. We offer*: Flexible working format - remote, office-based or flexible A competitive salary and good compensation package Personalized career growth Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) Active tech communities with regular knowledge sharing Education reimbursement Memorable anniversary presents Corporate events and team buildings Other location-specific benefits *not applicable for freelancers