N-iXis a global software development service company that helps businesses across the globe create next-generation software products. Founded in 2002, we unite 2,400+ tech-savvy professionals across 40+ countries, working on impactful projects for industry leaders and Fortune 500 companies. Our expertise spans cloud, data, AI/ML, embedded software, IoT, and more, driving digital transformation across finance, manufacturing, telecom, healthcare, and other industries. Join N-iX and become part of a team where your ideas make a real impact.
Our client is a leading, fully regulated US-based digital asset trading platform. They provide secure, low-latency access to cryptocurrency markets, acting as a bridge between traditional finance and the Web3 ecosystem.
The Senior Mobile Engineer will play a pivotal role in transitioning the core mobile platform from native environments to a unified Flutter/Dart codebase. You will maintain the stability of the existing production iOS app while architecting and developing robust, scalable cross-platform features, ensuring a seamless migration process.
Key Responsibilities:
- Maintain, enhance, and support our production native iOS application written in Swift.
- Collaborate on the design and development of a new Flutter/Dart codebase, ensuring performance and scalability.
- Own end-to-end delivery of mobile features, including development, testing, release, and ongoing support
- Build clean, modular, and reusable code to support scalable mobile architecture
- Collaborate with Product, Design, and Backend teams to define requirements and deliver high-quality features
- Optimize app performance, responsiveness, and reliability across a range of iOS devices
- Integrate RESTful APIs and ensure efficient data handling and state management
- Participate in code reviews and contribute to maintaining high standards of code quality and maintainability
- Identify and resolve performance bottlenecks, bugs, and technical issues
- Partner with QA and DevOps to support CI/CD pipelines, automated testing, and release processes
- Mentor junior engineers and contribute to a culture of continuous improvement
Required Qualifications:
- Bachelor's degree in Computer Science or a related field;
- 5+ years in mobile development experience: 3+ years of native iOS (Swift) and 2+ years of Flutter/Dart (or strong cross-platform experience with proven learning track).
- Strong expertise in iOS development: Swift, UIKit/SwiftUI, architecture patterns (MVC, MVVM, VIPER, Clean), and modern concurrency (Combine, async/await)
- Hands-on Flutter experience: Dart, state management (Provider, Riverpod, Bloc, or GetX), and native–Flutter integration (platform channels/pigeon).
