Senior Software Developer II

Rosstone; Gauteng; On-site; ZAR 650,000 - 900,000; Full time

Job summary

Rosstone in Gauteng is seeking an experienced Senior Frontend Engineer to design, develop, and maintain robust front-end applications using React.js. You will transform business requirements into clean, efficient, and reusable code and build responsive, high-performance user interfaces.

Collaborate with product owners, designers, backend developers, and QA teams in an Agile environment, mentor junior developers, contribute to architecture, and champion performance and security best practices.

Qualifications

• Degree or Diploma in Computer Science, Information Systems, or related field (or equivalent practical experience).
• 5+ years in software development.
• 3+ years hands-on experience with React.
• Experience working in Agile teams.
• Exposure to enterprise or large-scale systems (advantageous).

Responsibilities

• Design, develop, and maintain front-end apps using React.js.
• Transform requirements into clean, reusable code.
• Build responsive, high-performance user interfaces.
• Integrate front-end with REST APIs and backend services.
• Ensure code quality through reviews, testing, and best practices.

Skills

React.js

JavaScript (ES6+)

HTML5

CSS3

Redux / Context API

REST API integration

Webpack / Vite

Git

Responsive design

Cross-browser compatibility

Education

Degree or Diploma in Computer Science, Information Systems, or related field

Tools

Webpack

Vite

Git

Job description

Responsibilities

• Design, develop, and maintain robust front-end applications using React.js
• Transform business requirements into clean, efficient, and reusable code
• Build responsive, high-performance user interfaces
• Integrate front-end solutions with RESTful APIs and backend services
• Ensure code quality through reviews, testing, and best practices

Technical Leadership

• Mentor and guide junior and intermediate developers
• Contribute to architecture and design decisions
• Champion best practices in performance, security, and maintainability
• Participate in sprint planning, estimation, and technical discussions

Collaboration & Delivery

• Work closely with product owners, designers, backend developers, and QA teams
• Support Agile processes (Scrum / SAFe)
• Troubleshoot and resolve production issues
• Continuously improve development standards and tooling

Qualifications:

• Degree or Diploma in Computer Science, Information Systems, or related field
  (or equivalent practical experience)

Experience:

• 5+ years in software development
• 3+ years hands-on experience with React
• Experience working in Agile teams
• Exposure to enterprise or large-scale systems (advantageous)

Technical Skills:

• Strong expertise in React.js
• Proficiency in JavaScript (ES6+), HTML5, CSS3
• Experience with Redux / Context API
• REST API integration experience
• Familiarity with tools like Webpack or Vite
• Version control (Git)
• Responsive design & cross-browser compatibility

Nice to Have:

• TypeScript, Next.js, or similar frameworks
• Cloud platforms (Azure / AWS)
• Testing frameworks (Jest, Cypress)
• Experience in financial services or regulated environments

Key Competencies

• Strong problem-solving and analytical thinking
• Excellent communication and collaboration skills
• Ownership mindset with attention to detail
• Ability to thrive in a fast-paced, Agile environment