Lead / Senior React Native Engineer

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, and 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, and ensure graceful states (loading, error, empty) and resilient data flows.


• Use AI to raise velocity & quality (Claude Code, Codex) alongside strong tests, performance checks, and WCAG-minded reviews. (Pelago also has a dedicated AI budget for preferred tooling!) 


• Strengthen foundations: evolve the design system and improve CI, code review, and releases to increase confidence and 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, and driving releases and post-launch improvements independently.


• Strong grasp of component architecture, design patterns, and state management (e.g., Tanstack Query, Zustand).


• Comfortable integrating backends (REST/GraphQL), working with real-time/streaming data, and shaping API contracts.


• Write clean, scalable, maintainable code with unit/integration tests and clear documentation.


• Sharp UX sensibility and attention to detail; commitment to accessibility (WCAG).


• Fluency with AI coding assistants (e.g., Claude Code, Codex) and the judgment to verify outputs.