Senior Cross-Platform Mobile Developer (Full-Stack Hybrid Apps) 💻

Mobile

Senior Cross-Platform Mobile Developer (Full-Stack Hybrid Apps) 💻

Mobile
Chmielna 132, Warszawa +4 Locations

DEV12 Group

Full-time
B2B
Senior
Remote
4 376.94 - 6 565.42 USD
Net per month - B2B

Job description

About the role

We’re looking for a Senior Cross-Platform Mobile Developer with a strong full-stack mindset - someone who can bridge the worlds of web and mobile to build scalable, high-performance hybrid applications.

This role goes beyond mobile UI: you’ll work across the full delivery stack - from frontend logic and native integrations to API communication and build pipelines. You’ll collaborate with backend, DevOps, and design teams while taking full technical ownership of the mobile layer within a modern enterprise ecosystem.

Your responsibilities

  • Lead the end-to-end development and maintenance of hybrid applications built with Next.js, TypeScript, and Capacitor.

  • Work closely with backend teams to define and optimize GraphQL and REST integration layers.

  • Implement and maintain native-to-web bridges (push notifications, secure storage, haptics, geolocation, etc.).

  • Architect modular, reusable, and high-performing solutions for multi-platform deployment.

  • Ensure the app’s performance, reliability, and security across Android and iOS ecosystems.

  • Design and maintain CI/CD pipelines and release processes (Xcode Cloud, certification management, store deployments).

  • Collaborate in Agile/Scrum teams, driving clarity and technical direction across the product roadmap.

Must-have skills

  • 3–6 years of experience in frontend and mobile development, including hybrid or cross-platform projects.

  • Advanced knowledge of React, Next.js, and TypeScript.

  • Strong understanding of:

    • Asynchronous state management and event architecture,

    • SAM pattern, SoC, and performance optimization in frontend frameworks.

  • Proven expertise with Capacitor.js (or similar tools such as Cordova, Ionic).

  • Experience designing and consuming GraphQL (Apollo Client) and REST APIs.

  • Proficiency in Git workflows, code review, and collaborative development processes.

Nice-to-have skills

  • Solid understanding of native iOS/Android ecosystems (Xcode, CocoaPods, Gradle, certification management, CI/CD).

  • Ability to extend or wrap native Swift/Kotlin modules with Capacitor plugins.

  • Familiarity with FCM/APN, Sentry, Storybook, and PostCSS workflows.

  • Knowledge of E2E and unit testing frameworks (Cypress, Playwright, Jest).

  • Experience setting up CI/CD pipelines and managing App Store / Play Store releases.

  • Understanding of offline-first strategies, caching, and security best practices.

  • Experience with UI kits and functional component libraries.

  • Awareness of zero-knowledge architecture concepts.

Ability to define technical standards and mentor team members in a product-driven environment.

Tech stack

    TypeScript

    regular

    Next.js

    regular

    REST API

    regular

    Mobile Development

    regular

    React

    regular

    GraphQL

    regular

    Capacitor.js

    regular

    Kotlin

    nice to have

    Swift

    nice to have

Office location