Senior React / React Native Engineer
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