Senior React Native Developer

Geniusee; Warszawa; Remote; PLN 170,000 - 256,000; Full time

Job summary

A technology company in Poland is seeking an experienced mobile developer to build hybrid applications using TypeScript and React Native. You will work on exciting startup projects, focusing on performance and mobile video integrations. Candidates should have at least 4 years of experience and be fluent in English. The role offers a competitive salary, flexible work hours, and the option to work remotely or in-office.

Benefits

Competitive salary

Professional study compensation

VIP medical insurance

Unlimited work from home

Paid vacation (18 days)

Qualifications

• 4+ years of experience building production-grade hybrid mobile apps.
• Proficiency in TypeScript and at least one native language (Swift/Kotlin).
• Experience with mobile video and push notifications.

Responsibilities

• Build resilient, low-latency mobile experiences.
• Automate releases to Google Play and Apple TestFlight.
• Bridge React Native with native components for performance.

Skills

TypeScript

React Native

iOS development

Android development

Mobile security controls

English (upper-intermediate)

Job description

Our mission atGeniusee istohelp businesses thrive through tech partnership and strengthen the engineering community bysharing knowledge and creating opportunities🌿
Wecare about Trust, Partnership, Transparency, and Responsibility. Weoffer asafe, inclusive and productive environment for all team members, and we’re always open tofeedback💜Ifyou want towork from home orwork inthe offices inKyiv, Lviv orWarsaw with stable electricity and Wi‑Fi , great— apply right now

An AI platform CCTV with real-time detection, instant incident notifications, and decision-ready analytics.

Requirements

• 4+ years of experience building production-grade hybrid mobile apps for iOS and Android.
• Proficiency in TypeScript, but also knowledge in at least one native language (i.e, Swift, Kotlin).
• Deep knowledge of React Native (New Architecture).
• Hands‑on experience with platform SDKs and device‑level APIs (e.g., permissions, networking, secure storage).
• Hands‑on experience implementing push notifications on both iOS and Android, including action buttons and background handlers.
• Experience with mobile video: prefetching, caching, HLS/MP4 trade‑offs, and playback reliability.
• Knowledge of mobile security controls (i.e, biometric auth, TLS pinning).
• Familiarity with LAN and real‑time communication protocols (MQTT, WebSocket, or SSE), including mTLS and LAN discovery (mDNS/Bonjour).
• Experience building resilient, low‑latency mobile experiences with robust offline support and background syncing.
• Experience automating releases to Google Play, Apple TestFlight, and managing code signing workflows.
• Hands‑on experience with OTA deployment and CI/CD (Expo Updates, CodePush, or similar).
• Hands‑on experience with bridging React Native with native iOS (Swift) and Android (Kotlin) components to optimize performance and access platform‑specific APIs.
• Upper-Intermediate English or higher.

Would be a plus

• Experience with device attestation (Play Integrity, DeviceCheck, App Attest).
• Experience with MDM/kiosk applications.
• Background in building apps with LAN fallback or offline‑first patterns.

What you will get

• Competitive salary and good compensation package;
• Exciting, challenging and stable startup projects with a modern stack;
• Ability to practice English and communication skills through permanent interaction with clients from all over the world;
• Professional study compensation, online courses and certifications;
• Career development opportunity, semi‑annual and annual salary review process;
• Necessary equipment to perform work tasks;
• VIP medical insurance or sports coverage;
• Informal and friendly atmosphere;
• The ability to focus on your work: a lack of bureaucracy and micromanagement;
• Flexible working hours (start your day between 8:00 and 11:30);
• Paid vacation (18 working days) and sick leaves;
• Cozy offices in 2 cities ( Kyiv & Lviv ) with electricity and Wi‑Fi (Generator & Starlink);
• Compensation for coworking (except for employees from Kyiv and Lviv);
• Unlimited work from home from anywhere in the world (remote);
• Geniusee has its own charity fund.

Thinking about joining our team?

Explore our background, values and benefits. Our company brings together some very interesting individuals and we are happy to help each other to become better and grow together