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Front-End Developer

Uni Systems

Brussels, Brussels, Belgium Hybrid permanent

Posted: March 16, 2026

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Quick Summary

A Front-End Developer will be responsible for designing and developing responsive web applications, ensuring a seamless user experience, and ensuring security and data protection.

Job Description

At Uni Systems, we are working towards turning digital visions into reality. We are continuously growing and we are looking for a Front-End Developer to join our UniQue team.

What will you be bringing to the team?

• Develop Front-end website architecture
• Design user interactions on web pages
• Develop features to enhance the user experience
• Build reusable code for future use
• Understand and implement security and data protection
• Perform Cross-platform optimisation
• Design responsive applications
• Design and develop APIs
• Participate in the design and creation of scalable software
• Maintain code integrity and organisation
• Write clean, functional code on the front-end
• Compile and analyse data, processes, and codes to troubleshoot problems and identify areas for improvement
• Test and fix bugs or other coding issues
• Meet both technical and consumer needs
• Write technical documentation


Requirements:
What do you need to succeed in this position?

• Master's degree and 13 or relevant work experience or a Bachelor's degree and 17 years of relevant work experience
• Minimum 10 years of experience in designing UI for information systems
• At least 10 years of experience in HTML and CSS
• Proficiency in HTML5, ES6, CSS3 and SASS
• At least 8 years of experience in JavaScript
• Minimum 5 years of experience with Angular2 framework or similar
• Minimum 5 years in Typescript and Bootstrap
• Minimum 5 years of experience in developing secure web applications
• At least 4 years of experience with XML and JSON
• At least 3 years of experience with JIRA and GIT
• Minimum 2 years of experience in RxJS
• Good knowledge in client-side development of complex applications involving: multi-module, Web Components
• Experience in Web security, authentication, and authorization protocols (OAuth, Open ID Connect)
• Hands-on experience with Git, JIRA, Confluence, Bamboo, Nexus, Crucible, Jenkins, and Sonar
• Experience with responsive and adaptive design
• Understanding of key design and SEO principles
• Experience in Redux architecture is a plus
• Strong organisational and time-management skills
• Capability of integration in an international/multi- cultural environment
• Excellent verbal communication. and Attention to detail
• Εxcellent use of the English language (verbal & written)

At Uni Systems, we are providing equal employment opportunities and banning any form of discrimination on grounds of gender, religion, race, color, nationality, disability, social class, political beliefs, age, marital status, sexual orientation or any other characteristics. Take a look at our Diversity, Equality & Inclusion Policy for more information.

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