Senior React Native Developer

2 dni temu

Warszawa, Mazovia, Polska CREATEIT S.C. BORKOWSKI BARTOSZ, FREDRYCH ALEKSANDER Pełny etat
About createIT

We work on large, international and mature projects, frequently operating on gigabytes of data. As such, our projects require constant tweaking and optimization. Our teams are characterized by different sizes and workflow, and we offer a lot of flexibility when it comes to the choice of solutions. We mostly work with Seniors and experts in a given field, creating optimal grounds for the exchange of experience.

About role

We are looking for an experienced React Native Developer to help build an AI-powered mobile health application. You will contribute to the development of a fast-evolving product that combines AI (OpenAI + RAG) with expert knowledge from the health domain. If you enjoy working in a dynamic environment focused on rapid iteration, UX/UI testing, and building scalable, high-quality code, then this role is for you.

About the project

The project focuses on developing a mobile application built with React Native (Expo) and a lightweight web panel. The goal is to create a scalable, user-centric product powered by AI and modern frontend technologies.

Key modules include:

  • Personalized onboarding
  • Symptom and mood tracking
  • AI-driven recommendations (RAG + evidence-based tips)
  • Chat with a virtual assistant
  • Insights and user data trends
A few words about the team

You will work in a compact, cross-functional team consisting of a CTO/Team Manager, 3 frontend/mobile developers, 1 QA, 1 AI/backend integrator, 2 UX/UI designers, and a Product Owner. The setup ensures close collaboration, fast feedback loops, and shared ownership of product decisions.

Your tasks
  • Development of the mobile frontend (Expo EAS OTA)
  • Implementation of key screens (chat, onboarding, insights)
  • Translating the design system from Figma into Tailwind/Nativewind
  • Integration with Supabase (auth, cache, API)
  • E2E testing (Playwright/Detox)
  • Collaboration with OpenAI API
  • Ensuring code quality and consistency
  • Introducing best practices and mentoring junior developers
The technologies you will be using
  • React Native (Expo SDK 50)
  • TypeScript
  • Tailwind (Nativewind)
  • React Navigation 7
  • Supabase (auth, RLS, cache, API)
  • 15 (App Router)
  • OpenAI API
  • Playwright / Detox (E2E tests)
Perks & Benefits
  • Private medical healthcare
  • Sport Packages
  • International Environment
  • Internal Training
  • Recommendation bonus
  • Stable projects within a supportive, growing environment
  • Team support and opportunities for professional development
  • Stable employment based on a B2B contract
Requirements
  • 5+ years of experience with JS/TS, including at least 3 years with React Native (Expo)
  • Experience integrating with backends (REST / Supabase / GraphQL)
  • Proven track record of end-to-end mobile project delivery
  • Experience with AI integrations (OpenAI API – nice to have)
  • Experience working in a startup environment (fast iterations, MVPs, UX testing)
  • Self-driven and proactive approach – comfortable in a startup setup
  • Technical maturity and strong sense of ownership
  • Openness to rapid iterations and frequent feedback
  • Good communication skills within a team (daily stand-ups, sprint reviews)
  • Strong focus on code review, high code quality, CI/CD practices, and feedback loops
  • English level min. B2 (daily communication with an international team)

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