Frontend Engineer

NOTE: We do not offer visa sponsorship for this role. This role is strictly onsite, we do not offer remote work. • Extensive React Native experience and clear ownership of mobile application architecture.• Ability to define architectural patterns, module boundaries, shared abstractions, and engineering standards for a production mobile app.• Strong understanding of how engineering breaks down across both frontend and backend, with the ability to work closely with backend and platform engineers on end-to-end system design.• Experience building or operating mobile release infrastructure, including CI/CD, feature flagging, staged rollouts, crash monitoring, performance monitoring, and OTA update strategy.• Experience building complex mobile products from the ground up, including major features and ideally an entire application.• Strong security and compliance instincts, including secure handling of PHI, secure token storage, audit logging, and evaluating third-party dependencies in regulated environments.• Experience working in heavily regulated industries such as digital health, financial services, or insurance.• Comfort working in a greenfield startup environment with high ownership and ambiguity.• Strong AI-tool fluency, with AI used as a core part of the engineering workflow to accelerate delivery without sacrificing quality.Important fit notes:• This role is best suited for a senior individual contributor who is still highly hands-on.• Candidates with director, VP, architect, or people-manager profiles are generally less aligned unless they are still deeply hands-on in the code.• This role requires someone who can lead technically while still building.• This is an in-person role in the Boston/Cambridge area.