Senior Frontend Developer React JS | Senior Frontend Entwickler React JS m/w/d

Unknown Employer

Mainz am Rhein, Rheinland-Pfalz, Deutschland
Published Nov 21, 2025
Full-time
No information

Job Summary

This Senior Frontend Developer role focuses on designing and enhancing smart, visually appealing web applications. The core responsibilities involve the continuous development of web applications utilizing React JS and AngularJS on the frontend, complemented by C# on the backend. Day-to-day tasks include ensuring high code quality through rigorous testing, code reviews, and pair programming within an agile framework, while proactively identifying optimization potential and guaranteeing an optimal User Experience (UX). Key qualifications include a degree in Computer Science and several years of experience with modern frontend technologies like React JS, JavaScript, TypeScript, HTML5, and CSS3, along with proficiency in C# or Java. The position offers a structured onboarding process, comprehensive professional development, a strong feedback culture, flexible working hours, and attractive benefits like a subsidized Deutschlandticket and a modern office environment.

Required Skills

Education

Completed degree in Computer Science or equivalent technical field

Experience

  • Several years of experience with React JS, AngularJS, JavaScript, TypeScript, HTML5, and CSS3
  • Experience with CSS preprocessors like Sass, Less, or PostCSS
  • Experience with modern build tools (e.g., Webpack, Npm, Rollup, Yarn)
  • Solid knowledge of current testing frameworks (e.g., Mocha, Jasmine, Jest)
  • Experience in mentoring new team members

Languages

English (Intermediate)

Additional

  • Not specified