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December 17, 2025

Fullstack Developer - React and Kotlin

Mid • Remote

$100 - $140/

Warsaw, Poland

The candidate will be responsible for designing and delivering high-quality web applications with intuitive user interfaces and robust Kotlin-based backend services.


Requirements:

  • Proficiency in React JS and Kotlin

  • Strong experience with HTML, CSS, JavaScript, and Lit libraries

  • Solid understanding of UI/UX principles and frontend optimization

  • Ability to troubleshoot and resolve production issues

  • Experience working collaboratively with Architects, Designers, and cross-functional teams


Responsibilities:

  • Design, develop, test, and maintain web-based user interfaces using React JS

  • Build and maintain backend services using Kotlin

  • Improve user experience and interface design through iterative development and feedback

  • Write clean, efficient presentation-tier code using HTML/CSS/JavaScript and React JS

  • Optimize performance and responsiveness of web applications

  • Collaborate closely with UX/UI Designers, Architects, and other engineers

  • Identify and fix bugs, and support production troubleshooting