Junior React Native Expo Engineer

We’re looking for a Junior Frontend ( React Native Expo) Engineer to join our team. Work Location: Poland (Krakow), Slovakia (Kosice) or Czechia (Prague). Hybrid: 2+ days per week in the office, the rest remote. The Mission We are building a complex, real-time ecosystem for micromobility and logistics systems sim—where split-second logistics meet seamless user experiences. We need a Junior React Native Expo Engineer to work on our Customer Mobile Web App and our high-utility Internal Admin Panels. You’ll be the bridge between the sleek, high-performance interface our users see and the robust, scalable Python services that power the logic. Key Responsibilities Mobile-First Frontend: Architect and scale our React-based mobile web application, ensuring 60fps performance and offline-first capabilities. Operational Control Centers: Build dense, data-heavy Admin Panels that allow our operations team to monitor real-time logistics, manage users, and handle complex dispatching. Scalable Backend: Design and maintain performant APIs using Python (FastAPI/Django) to handle high-concurrency event streams. End-to-End Ownership: From database schema design to CSS transitions, you’ll own the entire feature lifecycle. Who You Are The Architect: You don’t just “write code”; you design systems. You understand how a change in a Python microservice ripples out to the React frontend. UX Enthusiast: You understand that an Admin Panel requires different UX “muscle” (efficiency and density) than a mobile app (simplicity and speed). Problem Solver: You’ve dealt with the "hard stuff“—real-time GPS tracking, race conditions in booking logic, or complex state management. Pragmatist: You balance the need for clean, tested code with the reality of shipping features in a fast-paced environment. Will be a plus Led transformation of standalone product into scalable SaaS platform. Why Join Us? Work on a product with immediate, real-world impact. A “no-red-tape” environment where your architectural decisions stick. Interested? Let’s talk! Join Bluefield Technologies and be part of something new. Layer Technology Frontend — React Native Expo, Styled Components, Mobx/Redux, WebSockets. Experience with Firebase, Expo SDK, Expo Modules. Backend- Python (FastAPI / Django / Flask). Database — PostgreSQL, Redis (for real-time caching) Infrastructure — AWS/GCP, Docker, Kubernetes Real-time- WebSockets / Socket.io (for “Uber-style” live tracking) Requirements & Skills Commercial experience with React Native (Expo) Advanced proficiency in React Native Expo. Expert-level TypeScript experience with advanced types and strict configurations; Deep knowledge of React 18+ fundamentals: hooks, context, memoization, rendering performance. Strong knowledge of state management tools (Redux, MobX, Zustand, etc.); Experience building map-based UI: react-native-maps / MapView, markers, polylines/routes, camera control, clustering. Strong UI implementation skills: different screen sizes, accessibility basics. Hands-on experience with GPS / background location tracking Expertise in navigation: React Navigation (deep linking, nested navigators, modal flows). API integration: REST/GraphQL consumption, request caching, pagination, retries, error handling. Handling auth flows (JWT/OAuth), token refresh, secure storage patterns (Keychain/Keystore concepts). Core responsibilities: Full end-to-end ownership of the mobile app (iOS & Android) App maintenance, releases, production stability & incident handling GPS / geolocation + live tracking REST API + real-time event integration Performance, reliability, and architecture improvements Ability to understand business requirements and translate them into technical requirements. Required Skills React Native Expo, Styled Components, Mobx/Redux, WebSockets. Experience with Firebase. Expo SDK 52+, Expo Modules Language skills English: Upper intermediate (B2)