N-iX is looking for a Senior React / React Native Engineer to join our client’s Experience Platform engineering group.
About the Client
Our client is a leading Canadian online brokerage and wealth management fintech company. The platform provides retail investors with modern trading solutions, mobile applications, and a broad range of investment products within a highly regulated financial environment.
About the Project
The client is expanding its engineering presence in Ukraine and building a dedicated team consisting of a Team Lead, a Senior QA Engineer, and two product-focused development pods. Each pod includes four engineers and owns its domain end-to-end, covering web, mobile, and backend services.
As a Senior React / React Native Engineer, you will join one of these product pods within the Experience Platform group. While the role has a strong focus on client-facing applications, you will also contribute to backend services and APIs that power mobile and web experiences. You will play a key role in shaping technical solutions, driving engineering excellence, and mentoring other developers.
Responsibilities
- Lead technical design and implementation of complex features across React Native and ReactJS applications
- Build and maintain Node.js/TypeScript services and RESTful APIs supporting web and mobile platforms
- Drive application performance improvements, including rendering optimization, memory profiling, and bundle size reduction
- Break down complex business requirements into scalable technical solutions and deliverable increments
- Establish and promote best practices for code quality, testing, security, observability, and operational excellence
- Contribute to CI/CD pipeline improvements and application release processes
- Mentor engineers through code reviews, technical discussions, and knowledge sharing
- Collaborate closely with Product, UX, Architecture, and Security teams to deliver scalable and compliant solutions
- Participate in incident response activities and support production systems when required
- Evaluate and adopt modern engineering and AI-powered development tools to improve team productivity
Requirements
- 6+ years of experience building and maintaining production-grade software systems
- 5+ years of commercial experience with React Native or ReactJS and at least 1+ year of experience with the complementary technology
- Strong expertise in JavaScript/TypeScript, component architecture, and state management solutions
- 1+ year of hands-on experience with Node.js and TypeScript
- Experience designing, building, or consuming RESTful APIs
- Solid understanding of microservices and service-oriented architectures
- Experience working with cloud platforms (GCP preferred; AWS or Azure is also acceptable)
- Practical experience with CI/CD processes and containerized environments
- Proven track record of leading technical initiatives and influencing engineering decisions
- Strong communication skills and upper-intermediate or higher English level
- Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience
Nice to Have
- Experience with real-time data streaming technologies such as WebSockets, Kafka, or Google Pub/Sub
- Background in financial services, brokerage, trading platforms, or other regulated industries
- Exposure to native iOS/Android development and native module integration
- Experience with mobile application delivery pipelines and release management
- Familiarity with AI-powered engineering tools such as Claude Code
- Knowledge of secure software development practices, threat modeling, or DevSecOps
- Experience building AI/ML-powered product features
- Angular experience