Senior Mobile Frontend Engineer

Sequencing.com is on a mission to make whole genome sequencing accessible and actionable for everyone. As a high-growth startup at the intersection of AI, biotechnology, and consumer health, our engineering team is at the heart of everything we do - building secure, scalable, and innovative systems that serve our growing customer base and support critical product initiatives.

The Role
We’re looking for a Senior Mobile Developer to lead frontend development for our iOS and Android applications. This role is focused on building high-quality, production-ready mobile experiences using React Native, with a strong emphasis on performance, UX polish, and maintainable architecture. You’ll work closely with product, design, backend engineering, and AI teams to ship features end-to-end, influence technical direction, and help set best practices for mobile development across the company.

What You’ll Do
• Own and drive frontend development for our native iOS and Android apps using React Native
• Translate product specs and Figma designs into high-quality, performant mobile UI
• Collaborate closely with backend engineers to integrate APIs, real-time data, and AI-powered features
• Ensure consistency, accessibility, and platform-appropriate behavior across iOS and Android
• Optimize app performance, startup time, and responsiveness on modern devices
• Contribute to architectural decisions, component design, and state management patterns
• Lead code reviews and help maintain the overall quality bar for the mobile codebase
• Partner with QA to support testing, bug fixes, and release readiness
• Support App Store and Google Play release processes and ongoing maintenance

What We’re Looking For
• 6+ years of professional frontend mobile development experience
• 4+ years of hands-on experience building production apps with React Native
• Strong knowledge of TypeScript and modern React patterns
• Solid understanding of iOS and Android platform differences and constraints
• Experience integrating APIs
• Familiarity with mobile performance optimization and debugging
• Comfort working from product requirements and design specs without heavy oversight
• Strong communication skills and ability to collaborate across disciplines
• Experience with Expo and EAS build workflows
• Experience with animations, gestures, and rich interactive UI
• Familiarity with mobile analytics, logging, and monitoring tools
• Experience working on apps with AI-driven or real-time features
• Prior ownership of mobile releases in the App Store and Google Play

About Sequencing
Sequencing is powering the future of personalized health. We are the platform that transforms a person’s genome into a lifelong source of straightforward, actionable insights - for individuals, families, and healthcare professionals. By providing the application layer to your DNA, we turn complex genetic data into recurring value throughout every stage of life.

Our unique, clinical-grade Whole Genome Sequencing unlocks the most complete view of your DNA, screening for almost all known health conditions, traits, and medication responses - and translating that information into clear, actionable steps for managing health risks, optimizing wellness, and extending longevity.

As whole genome sequencing becomes a standard part of life, Sequencing is already the trusted platform where people safely store their DNA data - and will become the lifelong home for every genome on Earth. We’re a fully remote, global team of innovators, scientists, and builders, united by a mission to make genomics accessible, actionable, and life-changing for everyone. Proudly named GenomeWeb’s Best Place to Work in 2024, Sequencing is venture-backed and scaling rapidly to meet surging demand in the fast-growing personal genomics market.

If you’re excited to help redefine how the world thinks about health, join us in building the platform that brings every genome to life.

Sequencing Inc. is an equal opportunity employer. All aspects of employment, including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate based on race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, veteran status, or any other status protected under federal, state, or local law.