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.