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.

• Collaborate closely with backend engineers, product managers, and designers to create seamless, high-impact user experiences.

• Optimize app performance, identifying and resolving bottlenecks, memory issues, and platform-specific challenges.

• Implement best practices in mobile engineering, conducting thorough code reviews and mentoring team members.

• Stay ahead of the curve by researching and integrating emerging technologies to improve our mobile stack.

What You Bring

• 5+ years of mobile development experience, including 3+ years in React Native.

• Deep expertise in mobile architecture, performance optimization, and platform-specific development (iOS & Android).

• Strong proficiency in JavaScript & TypeScript, with experience integrating native modules.

• A product-focused mindset, with a deep understanding of UX, engagement, and performance.

• 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.

• 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.

• Experience mentoring engineers or leading technical initiatives.

Why Join Proof?

• Full-time, remote role (Canada-based).

• Competitive salary: $150,000 - $170,000 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.

• 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!