Senior Lead Engineer - React Native; Mobile Apps

Job Title: Senior Lead Engineer - React Native (Mobile Apps)
Location: Framingham, MA - on-site

Job Description:

We're looking for a Senior Lead Engineer - React Native with deep experience designing and building scalable, high-performance mobile applications using React Native, Type Script, Expo, and modern mobile architecture patterns. This role will play a critical part in shaping the technical direction of our mobile platform, driving architecture decisions, optimizing performance, and delivering enterprise-grade mobile experiences.

• Provide technical leadership and oversee the daily mobile engineering operations.
• Define and drive the mobile architecture strategy aligned with business goals.
• Lead the design and development of scalable, high-performance mobile applications using React Native and Type Script.
• Architect modular, reusable component systems and scalable state management solutions (Redux, Zustand, Context API, etc.).
• Design clean navigation, deep linking, and mobile routing strategies (React Navigation, Expo Router).
• Implement secure authentication flows (OAuth/OIDC, biometrics, secure storage, token lifecycle management).
• Drive native module integrations (Swift, Kotlin) for SDKs such as payments, fraud detection, analytics, push notifications, and device security.
• Optimize mobile performance (startup time, bundle size, memory usage, rendering performance, offline caching).
• Establish CI/CD pipelines for mobile (Fastlane, EAS Build, App Store Connect, Google Play Console).
• Lead app release management, versioning strategy, and store compliance.
• Ensure adherence to mobile security best practices, privacy compliance, and accessibility standards.
• Partner with backend teams to define API contracts and optimize mobile-backend interactions.
• Champion automated testing (Jest, React Native Testing Library, Detox) and code quality standards.
• Mentor engineers and foster a culture of ownership, craftsmanship, and continuous improvement.
• Participate in architecture reviews and roadmap planning for long-term mobile platform scalability.

• Strong hands-on experience building production-grade apps using React Native and Type Script.
• Deep understanding of Expo ecosystem (EAS, OTA updates, build pipelines, native configuration).
• Expertise in mobile architecture patterns (Clean Architecture, MVVM, modular architecture).
• Experience integrating native iOS (Swift) and Android (Kotlin) modules into React Native apps.
• Strong understanding of app lifecycle, memory management, threading, and performance tuning.
• Experience implementing push notifications, deep linking, analytics SDKs, and mobile security frameworks.
• Familiarity with authentication flows (OIDC, PKCE, secure token handling).
• Experience with API integrations (REST, Graph
  
  QL) and handling network resiliency/offline-first design.
• Strong understanding of mobile Dev Ops, CI/CD, and release governance.
• Experience collaborating in Agile environments and influencing cross-functional stakeholders.
• Ability to balance hands-on development with strategic architectural leadership.

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field (or equivalent experience).
• 10+ years of software development experience.
• 6+ years of hands-on mobile development experience.
• 4+ years leading React Native applications in production environments.
• Proven experience delivering apps to both Apple App Store and Google Play Store.
• Experience working with cloud-based backends (Azure, AWS, or GCP).
• Strong experience with CI/CD pipelines, automated testing, and Dev Ops best practices.
• Demonstrated leadership experience mentoring engineers and guiding technical direction.
• Strong problem-solving skills with the ability to make strategic architectural decisions balancing business and technical needs.