Senior React / React Native Engineer

Our client is a leading Canadian online brokerage and wealth management fintech. It provides retail investors with trading platforms, mobile apps and investment products, in a regulated financial environment. The Senior React / React Native Engineer will join one of the product pods in the Experience Platform engineering group. The role leans toward the client side: you will lead the design and delivery of React Native (mobile) and ReactJS (web) applications, and you will also build and maintain Node.js/TypeScript services and APIs behind them. Each pod owns its domain end to end, so engineers are expected to work across web, mobile and services. Key Responsibilities: Lead technical design and delivery of complex front-end features across React Native and ReactJS, documenting architectural trade-offs. Build and maintain Node.js/TypeScript services and RESTful APIs that support the web and mobile clients. Own cross-platform performance of your area: memory profiling, bundle size, render optimization and real-time data rendering. Break down large, ambiguous problems into deliverable increments and sequence them with product partners. Set and enforce engineering standards for code quality, testing, security, observability and operational readiness. Maintain automated test suites and improve CI/CD pipelines and app release practices. Mentor intermediate and junior developers through code reviews and pairing. Partner with Product, UX, Enterprise Architecture and Security on scalable, resilient and compliant designs. Take part in incident response and on-call rotations, and drive blameless post-incident reviews to closure. Explore and adopt AI tools that improve developer productivity. Required Qualifications: 6+ years of experience building, shipping and operating production software. 5+ years of hands-on experience with React Native (Expo or Bare) or ReactJS, and 1+ year with the other, including strong command of state management and component architecture. 1+ years of commercial experience with Node.js and TypeScript, including building and consuming RESTful APIs. Proven experience with RESTful APIs and microservices or service-oriented architectures, from the consuming or the building side. Cloud-native experience (GCP preferred; AWS or Azure considered), CI/CD and containerized workloads. Experience leading technical initiatives across several developers without formal authority. Strong communication skills in English, able to explain technical trade-offs to engineering and cross-functional audiences. Bachelor's degree in Computer Science, Software Engineering or a related field, or equivalent practical experience. TBU: testing stack, monorepo tooling, mobile CI/CD and release stack, native module experience Nice to Have: Real-time data streaming (WebSockets, Kafka, Pub/Sub) or low-latency financial/trading systems. Native iOS/Android exposure and native module integration. Experience with AI-boosted tools like Claude Code Domain experience in financial services, brokerage, trading or other regulated environments. Knowledge of secure development practices, threat modeling or DevSecOps. Experience building AI/ML-enabled features. Angular experience.   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