Senior Front-End Engineer - UI/UX & Performance Focus

TELEKOM HELLENIC BUSINESS SOLUTIONS SA; Brussel; Sur place; EUR 60 000 - 90 000; Plein temps

Résumé du poste

COSMOTE Global Solutions NV is seeking a highly skilled Front-end Developer to join our team in Belgium. You will develop user-facing features, ensure the feasibility of UI/UX designs, and optimize applications for speed and scalability.

You will collaborate with back-end developers and designers to improve usability, implement responsive design, review code, and write technical documentation. Fluent English is required.

Qualifications

• Bachelor’s degree in Computer Science or related field.
• Minimum 13 years of experience in front-end development.
• Strong proficiency in JavaScript, HTML5, and CSS3.
• Experience with modern front-end frameworks/libraries such as React, Angular, or Vue.js.
• Familiarity with RESTful APIs and asynchronous request handling.
• Knowledge of browser rendering behavior and performance optimization techniques.
• Experience with version control systems, preferably Git.
• Understanding of responsive design principles and mobile-first development.
• Good problem-solving skills and attention to detail.
• Ability to work well in a team environment and communicate effectively.
• Fluent in English.

Responsabilités

• Develop new user-facing features and build reusable code and libraries for future use.
• Ensure the technical feasibility of UI/UX designs.
• Optimize applications for maximum speed and scalability.
• Collaborate closely with back-end developers and web designers to improve usability.
• Maintain and improve website and application performance.
• Implement responsive design to ensure compatibility across devices.
• Participate in code reviews and contribute to team knowledge sharing.
• Write and maintain technical documentation.

Connaissances

Front-end development

JavaScript

HTML5

CSS3

React

Angular

Vue.js

RESTful APIs

Git

Responsive design

Team communication

English fluency

Formation

Bachelor's degree in Computer Science

Outils

Git

RESTful APIs

Description du poste

COSMOTE Global Solutions NV is seeking a highly skilled Front-end Developer to join our team in Belgium. You will develop user-facing features, ensure the feasibility of UI/UX designs, and optimize applications for speed and scalability.

You will collaborate with back-end developers and designers to improve usability, implement responsive design, review code, and write technical documentation. Fluent English is required.