We are seeking a Senior Frontend Engineer with expertise in ReactJS to develop and maintain our user interfaces. The ideal candidate will have a strong understanding of modern frontend technologies and be able to deliver high-quality, scalable code.

Key Responsibilities:
* Develop and maintain user interfaces using ReactJS.
* Collaborate with designers and backend developers.
* Write clean, testable, and maintainable code.
* Optimize frontend performance.

Required Skills:
* Expertise in ReactJS.
* Strong knowledge of HTML, CSS, and JavaScript.
* Experience with state management libraries (e.g., Redux, Context).
* Familiarity with testing frameworks (e.g., Jest, Enzyme).