Senior Front-End Engineer: High-Performance, SEO-Driven UIs

Avatar Advisory; Johannesburg; On-site; ZAR 600,000 - 800,000; Full time

Job summary

Avatar Advisory in Johannesburg seeks a skilled Senior Front-End Developer. You will design and develop high-performance web applications, focusing on responsive and SEO-optimized interfaces. Collaborate closely with UX/UI designers and back-end developers while ensuring code quality and team efficiency. Candidates should have 5-8+ years experience, strong proficiency in HTML5, CSS3, and JavaScript, with knowledge of SEO practices and web performance optimization. This opportunity offers a dynamic working environment and a chance to innovate in front-end development.

Qualifications

• 5–8+ years of front-end development experience.
• Strong proficiency in HTML5, CSS3, and JavaScript (ES6+).
• Solid understanding of responsive and mobile-first design.
• Proven experience with SEO principles and web performance optimization.

Responsibilities

• Build and maintain scalable, high-quality web applications.
• Develop responsive, mobile-first interfaces using modern CSS frameworks.
• Write clean, efficient, and reusable code using JavaScript.
• Collaborate with designers to improve usability and accessibility.

Skills

HTML5

CSS3 (Flexbox, Grid, SASS/SCSS)

JavaScript (ES6+)

React

Vue

Angular

SEO principles

Responsive Design

Education

Bachelor’s degree in Computer Science, IT, or related field

Tools

Git

Google Search Console

Lighthouse

Job description

Avatar Advisory in Johannesburg seeks a skilled Senior Front-End Developer. You will design and develop high-performance web applications, focusing on responsive and SEO-optimized interfaces. Collaborate closely with UX/UI designers and back-end developers while ensuring code quality and team efficiency. Candidates should have 5-8+ years experience, strong proficiency in HTML5, CSS3, and JavaScript, with knowledge of SEO practices and web performance optimization. This opportunity offers a dynamic working environment and a chance to innovate in front-end development.