Overview

Senior Front end Developer Jobs in Johannesburg, South Africa at Avatar Advisory

Role Purpose

The Senior Front-End Developer is responsible for designing and developing high-performance, user-centric web applications. This role focuses on creating responsive, accessible, and SEO-optimized interfaces using modern front-end technologies, while collaborating closely with UX/UI designers, backend developers, and digital marketing teams.

Key Responsibilities 1. Front-End Development

  • Build and maintain scalable, high-quality web applications
  • Develop responsive, mobile-first interfaces using modern CSS frameworks and methodologies
  • Write clean, efficient, and reusable code using JavaScript (ES6+)
  • Ensure cross-browser compatibility and consistent user experience

2. UI/UX Implementation

  • Translate UI/UX designs into functional, interactive interfaces
  • Collaborate with designers to improve usability and accessibility
  • Implement design systems and component libraries

3. SEO & Performance Optimization

  • Apply technical SEO best practices (semantic HTML, structured data, meta tags)
  • Optimize page speed, Core Web Vitals, and overall performance
  • Ensure proper indexing, crawlability, and accessibility standards
  • Work with marketing teams to align front-end delivery with SEO strategy

4. Code Quality & Best Practices

  • Enforce coding standards, version control, and documentation
  • Conduct code reviews and mentor junior developers
  • Implement testing strategies (unit, integration, UI testing)
  • Ensure security and data protection best practices

5. Collaboration & Agile Delivery

  • Work within Agile/Scrum teams to deliver features iteratively
  • Collaborate with backend developers to integrate APIs and services
  • Participate in sprint planning, stand-ups, and retrospectives

6. Continuous Improvement & Innovation

  • Stay updated with emerging front-end technologies and trends
  • Propose and implement improvements to architecture and performance
  • Drive adoption of modern frameworks and tooling

Key Performance Indicators (KPIs)

  • Page load speed and Core Web Vitals performance
  • SEO performance (organic traffic, rankings, crawlability)
  • Code quality and defect rates
  • Delivery timelines and sprint velocity
  • User engagement metrics (bounce rate, session duration)
  • Accessibility compliance (WCAG standards)

Minimum Requirements

  • Bachelor’s degree in Computer Science, IT, or related field
  • 5–8+ years of front-end development experience
  • Strong proficiency in:
    • HTML5, CSS3 (Flexbox, Grid, preprocessors like SASS/SCSS)
    • JavaScript (ES6+) and modern frameworks (React, Vue, or Angular)
  • Solid understanding of responsive and mobile-first design
  • Proven experience with SEO principles and web performance optimization
  • Experience with version control systems (Git)

Preferred Qualifications

  • Experience with frameworks like Next.js, Nuxt.js, or similar SSR technologies
  • Familiarity with technical SEO tools (e.g., Google Search Console, Lighthouse)
  • Experience with headless CMS and API integrations
  • Knowledge of web accessibility standards (WCAG)
  • Exposure to CI/CD pipelines and Dev Ops practices

Key Competencies

  • Strong problem-solving and analytical thinking
  • Attention to detail and design sensitivity
  • Effective communication and collaboration
  • Mentorship and leadership skills
  • Adaptability and continuous learning mindset

Nice-to-Have Skills

  • Type Script
  • Web animations (GSAP, Framer Motion)
  • Progressive Web Apps (PWA)
  • Basic backend knowledge (Node.js, APIs)
  • SEO Principles
  • HTML, CSS
  • Testing & Debugging

Title: Senior Front end Developer

Company: Avatar Advisory

Location: Johannesburg, South Africa

Category:

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