Senior Full Stack Engineer

Outlive is a company focused on building a mobile-first digital health platform aimed at improving long-term health through personalized health intelligence and behavior change. As a Senior Full Stack Engineer, you will be responsible for implementing product features across mobile, web, and backend services while ensuring high engineering standards in a HIPAA-aware environment.

Responsibilities:

• Own end-to-end implementation of product features spanning mobile (React Native / Expo), web (Next.js App Router), and backend services (NestJS / Node.js)
• Collaborate closely with product and design to translate complex health concepts into clear, usable experiences
• Drive technical decisions that balance speed, quality, and long-term maintainability
• Build and maintain shared UI and interaction patterns using Tamagui across mobile and web
• Implement mobile experiences using React Native (Expo), expo-router, TanStack Query, and offline/background sync patterns
• Build web experiences using Next.js (App Router) and React
• Integrate payments using Stripe.js and react-stripe-js
• Integrate frontend applications with custom authentication hooks backed by Firebase and backend identity services
• Consume and evolve REST APIs
• Implement analytics (PostHog), error tracking (Sentry), and accessibility best practices
• Write and maintain frontend tests using Jest, Vitest, React Testing Library, Playwright, and Detox as appropriate
• Design and implement backend services using NestJS (v11) and TypeScript
• Build secure, well-validated REST APIs using zod, class-validator, and OpenAPI
• Implement authentication and authorization using Google Identity JWT validation and role-based access control
• Model relational data using Prisma and Postgres (Cloud SQL)
• Implement async and background workflows using Google Cloud Tasks
• Integrate with external services such as OCR, scheduling APIs, and third-party data sources
• Ensure observability through structured logging, metrics, and Sentry
• Write unit and integration tests using Jest
• Act as a senior individual contributor, setting quality bars through code, reviews, and architectural decisions
• Partner closely with infrastructure and DevOps engineers to ensure reliable deployments
• Identify opportunities to simplify systems and reduce operational overhead
• Contribute to evolving engineering standards, patterns, and best practices
• Mentor mid-level engineers as the team grows

Requirements:

• 6+ years of professional software engineering experience
• Strong experience across frontend and backend development
• Production experience with React (web and/or React Native)
• Strong experience with Node.js and TypeScript
• Experience designing and consuming REST APIs
• Solid understanding of relational data modeling and ORMs
• Strong grasp of authentication, authorization, and security fundamentals
• Comfort working in small teams with high ownership and autonomy
• Ability to lead or follow as the moment calls for
• Familiarity with design patterns of distributed systems
• Hands-on experience with React Native (Expo)
• Production experience with NestJS
• Familiarity with Google Cloud Platform
• Experience in healthcare, wellness, or other regulated domains
• Experience implementing offline-first or background processing features
• Strong accessibility and UX quality sensibilities