Senior Mobile Engineer, React Native

Proof is a high-growth startup transforming legal tech with a cutting-edge platform trusted by thousands of law firms across the U.S.
As we continue to scale, we’re looking for a Senior Mobile Engineer to own and help drive the evolution of our React Native applications.

If you thrive in fast-paced environments, love solving complex technical challenges, and are passionate about building high-performance mobile experiences, this role is for you.

What You’ll Do

• Lead the architecture, development, and optimization of Proof's React Native mobile applications.
• Contribute to backend development, building and maintaining APIs, services, and database integrations that power our mobile apps.
• Collaborate closely with engineers, product managers, and designers to create seamless, high-impact user experiences across the full stack.
• Optimize app performance, identifying and resolving bottlenecks, memory issues, and platform-specific challenges on both frontend and backend.
• Implement best practices in mobile and backend engineering, conducting thorough code reviews and mentoring team members.
• Stay ahead of the curve by researching and integrating emerging technologies to improve our mobile and backend stack.
• Develop and maintain reusable components, libraries, and API endpoints for future use.
• Ensure security best practices across the stack, including secure storage, authentication mechanisms, and API security.
• Utilize modern state management solutions such as Redux, Zustand, or Recoil.

What You Bring

• 5+ years of software development experience, with 2-3+ years focused on React Native or other mobile frameworks.
• Strong fullstack capabilities with experience in backend technologies (Node.js, Python, or similar) and database systems (PostgreSQL, MongoDB, etc.).
• Expertise in mobile architecture, performance optimization, and platform-specific development (iOS & Android).
• Strong proficiency in JavaScript & TypeScript, with experience integrating native modules and building RESTful APIs.
• A product-focused mindset, with a deep understanding of UX, engagement, and performance across the entire application stack.
• Experience with RESTful APIs, GraphQL (nice to have), and backend performance optimization.
• Familiarity with mobile CI/CD pipelines, automated testing frameworks, and app store submission processes.
• Experience with push notifications, deep linking, and background services.
• Knowledge of Firebase, Fastlane, and OTA update solutions.
• A self-starter who thrives in an agile, high-growth environment with excellent communication and collaboration skills.

Bonus Points

• Experience with Expo Application Services (EAS).
• Background in scaling mobile applications and backend services.
• Experience mentoring engineers or leading technical initiatives.
• Knowledge of native iOS (Swift) or Android (Kotlin) development.
• Strong understanding of GraphQL and Apollo Client.
• Experience with cloud platforms (AWS, GCP, Azure) and containerization (Docker, Kubernetes).
• Familiarity with microservices architecture and event-driven systems.

Why Join Proof?

• Full-time, remote role (Canada-based)
• Competitive salary: $120,000 - $160,000 CAD
• Flexible time off & holidays to support work-life balance
• Comprehensive benefits, including healthcare, dental, life, and long-term disability
• Top-tier equipment & tools to set you up for success

If you’re excited about shaping the future of legal tech and building world-class mobile experiences, we’d love to hear from you!