Senior Software Engineer, Frontend

Summary

Join Marqeta as a Senior Frontend Software Engineer and lead the development of our UX Toolkit (Web/Native). This newly formed area requires a technical leader with extensive experience in building cross-platform mobile and web applications. Collaborate with product and design teams to create innovative cardholder experiences. Lead the development of React Native-based SDKs and applications, ensuring high performance and seamless integration. Architect and implement reusable React Native components, optimize performance for mobile applications, and work hands-on with React Native, JavaScript/TypeScript, HTML, and CSS. Define and contribute to technical roadmaps and participate in design discussions. Advocate for and implement modern engineering practices. This role offers flexibility, with remote work options in Ontario or British Columbia, Canada.

Requirements

• 5+ years of experience in web and mobile application development with a focus on React Native
• Strong proficiency in React Native for building mobile applications, including experience with React Navigation, Expo, and native module development (Swift/Kotlin/Objective-C/Java)
• Experience integrating React Native applications with native iOS and Android components, bridging gaps where necessary
• Deep understanding of React.js, Redux, Context API, or similar state management frameworks
• Experience working with design systems and component-based architecture to ensure UI consistency and scalability
• Strong knowledge of mobile performance optimization techniques, including profiling, memory management, and UI rendering optimizations
• Experience integrating RESTful APIs and GraphQL into mobile and web applications
• Familiarity with mobile authentication techniques, including OAuth, biometric authentication, and secure session management
• Experience with CI/CD pipelines for mobile development, such as Fastlane, Bitrise, or App Center
• Proficiency with Git and modern development workflows, including feature branching and pull request reviews
• Experience mentoring junior engineers and leading mobile development initiatives
• Solid problem-solving skills, debugging expertise, and the ability to troubleshoot cross-platform performance issues
• Excellent communication skills and ability to collaborate with cross-functional teams, including designers, product managers, and backend engineers

Responsibilities

• Collaborate with product and design teams to develop innovative cardholder experiences across web and mobile platforms
• Lead the development of React Native-based SDKs and applications, ensuring high performance and seamless integration across platforms
• Architect and implement reusable React Native components that align with modern design patterns and best practices
• Optimize performance for mobile applications, leveraging techniques such as lazy loading, code splitting, and efficient rendering strategies
• Work hands-on with React Native, JavaScript/TypeScript, HTML, and CSS to build and maintain scalable front-end solutions
• Define and contribute to technical roadmaps, design documents, and system architecture to ensure high-quality UI experiences
• Participate in design discussions, advise stakeholders, and establish best practices for mobile and web application development
• Advocate for and implement modern engineering practices, including automated testing, CI/CD pipelines, and performance monitoring

Preferred Qualifications

• Experience with Swift and/or Kotlin for deeper native integrations in React Native apps
• Domain experience in Payments or Fintech industries
• Familiarity with App Store and Google Play Store deployment processes, including code signing, release management, and A/B testing
• Experience using TypeScript to enhance maintainability and scalability in React Native applications
• Knowledge of WebAssembly, PWAs, or alternative approaches to cross-platform development
• Passion for delivering high-quality, delightful user experiences with a customer-first mindset

Benefits

• Multiple health insurance options
• Flexible time off – take what you need
• Retirement savings program with company contribution
• Equity in a publicly-traded company
• Monthly stipend to support our remote work model
• Annual “development dollars” to support our people growth and development
• Family-forming benefits and up to 20 weeks of Parental Leave