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 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
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Lead the architecture, development, and optimization of Proof’s React Native mobile applications.
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Collaborate closely with backend engineers, product managers, and designers to create seamless, high-impact user experiences.
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Optimize app performance, identifying and resolving bottlenecks, memory issues, and platform-specific challenges.
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Implement best practices in mobile engineering, conducting thorough code reviews and mentoring team members.
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Stay ahead of the curve by researching and integrating emerging technologies to improve our mobile stack.
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Develop and maintain reusable components and libraries for future use.
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Ensure security best practices in mobile development, including secure storage and authentication mechanisms.
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Utilize modern state management solutions such as Redux, Zustand, or Recoil.
What You Bring
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5+ years of mobile development experience, including 3+ years in React Native.
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Expertise in mobile architecture, performance optimization, and platform-specific development (iOS & Android).
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Strong proficiency in JavaScript & TypeScript, with experience integrating native modules.
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A product-focused mindset, with a deep understanding of UX, engagement, and performance.
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Experience with RESTful APIs, GraphQL (nice to have), and backend performance optimization.
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Familiarity with mobile CI/CD pipelines, automated testing frameworks, and app store submission processes.
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Experience with push notifications, deep linking, and background services.
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Knowledge of Firebase, Fastlane, and OTA update solutions.
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A self-starter who thrives in an agile, high-growth environment with excellent communication and collaboration skills.
Bonus Points
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Experience with Expo Application Services (EAS).
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Background in scaling mobile applications.
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Experience mentoring engineers or leading technical initiatives.
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Knowledge of native iOS (Swift) or Android (Kotlin) development.
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Understanding of GraphQL and Apollo Client.
Why Join Proof?
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Full-time, remote role (Canada-based).
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Competitive salary: $120,000 - $150,000 CAD.
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Flexible time off & holidays to support work-life balance.
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Comprehensive benefits, including healthcare, dental, life, and long-term disability.
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Top-tier equipment & tools to set you up for success.
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A strong engineering culture that values autonomy, ownership, and impact.
If you’re excited about shaping the future of legal tech and building world-class mobile experiences, we’d love to hear from you!
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