UI Front End Developer

Job Description

OnSumaye is hiring for experienced UI Front End Developer with a passion for new technologies and creativity in the world of design.


  • 5+ years of deep expertise in HTML, CSS preprocessors like Sass or LESS, JavaScript, Jquery, and Git.
  • Worked on high traffic customer-facing web and mobile sites.
  • Can convert UX mockups into UI using HTML, CSS and JavaScript.
  • Knowledge about modern CSS language features, including Flexbox, CSS Grid, feature queries 
  • An understanding of HTML semantics and ARIA roles, and knowing their correct application.
  • Experience building high performing responsive websites from the ground. 
  • Experience using tools such as Adobe xd, Figma, Git
  • Proficient understanding of cross-browser compatibility issues and ways to work around them.
  • Build reusable UI components, ensuring that UI code base is scalable and maintainable
  • Problem-solving and analytical skills
  • Well versed with UI/UX Designs and principles. 
  • Participate in user research/usability testing (as needed or appropriate)
  • Knowledge of major CMS like WordPress/Joomla etc.
  • Good understanding of SEO principles.


  • Bachelors degree or higher in the commerce or science discipline. 5+years of experience in UI Developer/ Designer is a must.
  • Experience and advanced knowledge in HTML5, CSS3, JavaScript, Visual Designing, PSD, SAAS or SCSS or LESS, Bootstrap.
  • JavaScript, jQuery, OOP (object-oriented programming).
  • Experience in developing and implementing high performance and code optimized for multiple devices.
  • UX development is mandatory.
  • Creating responsive templates for websites & web applications.
  • Proficient understanding of client-side scripting and JavaScript frameworks, including jQuery.
  • Understanding and knowledge of template conversion from HTML for CMS, such as Joomla and WordPress.
  • Proficient understanding of file versioning (CSS, Images, JAVASCRIPT).
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