Lead / Senior React Native Engineer

New York, NY Pelago is the world’s leading virtual clinic for Substance Use Management. Our program provides guidance, support and treatment for members seeking to overcome their tobacco, alcohol and opioid use. From unhealthy habits to active substance use disorders, Pelago delivers a personalized solution based on individual health, habits, genetics, and goals, providing care for members wherever they might be on the substance use spectrum. Pelago's suite of virtual services ranges from education, to cognitive behavioral therapy (CBT) to comprehensive medication-assisted treatment (MAT). Pelago enables employers and health plans to deliver accessible, affordable, and effective treatment for substance misuse. Pelago has scaled to helping hundreds of employers and health plans and has already helped more than 750,000 members manage their substance use better. We have recently closed our Series C and raised over $151m from leading global investors. If you are passionate about making an impact on the health of others, join us and make it happen! Help incubate, launch, and scale new AI-native products at Pelago Join Pelago’s AI Squad as an early Fullstack Engineer and help define the next generation of behavioral health products. In this role, you’ll ship end-to-end features across React Native, React/TypeScript, and Python services transforming prototypes into production-ready experiences. Your work will move fast - from hypothesis to research preview to live product - and will be grounded in clinical safety, accessibility, and measurable outcomes. You’ll bring engineering craft and a sharp UX eye within a team that values thoughtful design, clean architecture, and meaningful user impact, leveraging modern AI-enhanced development tools to move faster and build better. While most of our surfaces are React Native, some use-cases will require platform-specific code (we use Expo). You should be comfortable writing Swift and Kotlin and exposing that functionality to RN. This is a hybrid role with a high-collaboration rhythm (4 days/week in our NYC office).

In this role you will…

Build, ship, and maintain cross-platform applications in React Native and React/TypeScript (web) from prototype to production.
Turn AI research into product: instrument experiments,... validate hypotheses,... iterate quickly on research previews on the path to live product.
Partner cross-functionally (Design,... Product,... Backend,... Clinical) to deliver accessible,... reliable interfaces that handle real-time data.
Integrate & evolve APIs (REST), help shape contracts,... ensure graceful states (loading,... error,... empty) and resilient data flows.
Use AI to raise velocity & quality (Claude Code,... Codex) alongside strong tests,... performance checks,... WCAG-minded reviews. (Pelago also has a dedicated AI budget for preferred tooling!)
Strengthen foundations: evolve the design system... improve CI,... code review,... releases to increase confidence... speed.

The background we are looking for...

3+ years in React Native, 7+ years building production software
Ability to lead React Native work from prototype to GA,... setting approach,... coordinating APIs,... driving releases... post-launch improvements independently.
Strong grasp of component architecture,... design patterns,... state management (e.g., Tanstack Query,... Zustand).
Comfortable integrating backends (REST/GraphQL), working with real-time/streaming data,... shaping API contracts.
Write clean,... scalable,... maintainable code with unit/integration tests... clear documentation.
Sharp UX sensibility... attention to detail; commitment to accessibility (WCAG).
Fluency with AI coding assistants (e.g., Claude Code,... Codex)... judgment... verify outputs.

The provided range reflects our US target salary range for this full-time position which is part of our broader total compensation package including incentive bonus program stock options comprehensive benefits incentive pay applicable to eligible roles. Individual pay within the range will vary based on a variety of factors like role-related experience education internal pay equity other relevant business factors. At Pelago we are committed to an equitable fair pay philosophy review total compensation for our employees at least twice a year. Base Pay Range $180,000 - $195,000 USD