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Sequencing · 6 days ago

Senior Mobile Frontend Engineer

United States

Full-time

Remote

Senior Level

$90K/yr - $140K/yr

6+ years exp

Sequencing.com is a high-growth startup focused on making whole genome sequencing accessible and actionable for everyone. They are seeking a Senior Mobile Developer to lead frontend development for their iOS and Android applications, focusing on building high-quality mobile experiences using React Native and collaborating with various teams to ship features and influence technical direction.

GeneticsInformation TechnologyLife Science

Responsibilities

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

Qualification

React NativeTypeScriptMobile performance optimizationAPI integrationIOSAndroid knowledgeAnimationsGesturesMobile analytics toolsExpoEAS workflowsCollaboration skillsCommunication skills

Required

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

Company

Sequencing

Sequencing.com is the world’s largest marketplace for DNA analysis apps and reports that analyze DNA data from any test (23andMe, AncestryDNA, genome sequencing) and provide clear solutions for better health.

Founded in 2019

Los Angeles, California, USA

11-50 employees