Senior Frontend Engineer (React/TypeScript)

Placements24; Sandton; On-site; ZAR 900,000 - 1,200,000; Full time

Benefits offered by this job

Competitive salary

Health insurance

Professional development

Modern office in Sandton

Conferences/training

Retirement plan

Job summary

Placements24 in Sandton, Gauteng, is seeking a Senior Frontend Engineer specialized in React and TypeScript to build high-traffic user interfaces for a leading e-commerce platform.

You will translate designs into performant UI, collaborate with backend teams, and mentor junior devs while shaping the frontend architecture. This role offers a competitive salary, modern office amenities, and strong professional development opportunities within a fast-paced, innovative team.

Qualifications

• Bachelor's degree or equivalent work experience in CS or related field.
• Minimum 5 years of professional frontend experience.
• Expertise in JavaScript (ES6+) and TypeScript.
• Proven React.js experience building complex apps.
• Strong state management knowledge (Redux, Context API).
• Experience with Webpack, Babel, HTML5, CSS3 and preprocessors (SASS/LESS).
• Experience consuming RESTful APIs and Git.
• Familiarity with Next.js is a plus.
• Testing with Jest and React Testing Library.

Responsibilities

• Develop, test, and deploy high-quality, responsive user interfaces using React and TypeScript.
• Collaborate with UI/UX designers to translate wireframes and mockups into functional web pages.
• Work closely with backend engineers to integrate frontend components with server-side logic via APIs.
• Optimize application components for maximum speed, scalability, and user experience.
• Write clean, maintainable, and well-documented code.
• Implement and manage state management solutions (e.g., Redux, Zustand).
• Ensure cross-browser compatibility and performance optimization.
• Participate in code reviews, providing constructive feedback to peers.
• Troubleshoot and debug frontend issues, identifying and implementing effective solutions.
• Stay up-to-date with the latest frontend technologies and best practices.
• Mentor junior frontend developers and contribute to team best practices.
• Contribute to architectural discussions and decisions for the frontend stack.

Skills

React.js

TypeScript

JavaScript (ES6+)

Redux

Zustand

Unit testing (Jest)

React Testing Library

Web performance

Education

Bachelor's degree in Computer Science, Web Development, or related field

Tools

Webpack

Babel

HTML5

CSS3

RESTful APIs

Git

Next.js

Job description

About the Role

Our client, a rapidly growing e-commerce platform, is seeking a Senior Frontend Engineer with expertise in React and TypeScript to join their vibrant team in Sandton, Gauteng . This role is integral to building and enhancing user-facing features for a high-traffic web application. You will be responsible for translating complex designs into intuitive and performant user interfaces, collaborating closely with backend developers, product managers, and UI/UX designers. The ideal candidate possesses a strong understanding of modern JavaScript frameworks, state management, and performance optimization techniques. This is an exciting opportunity to shape the user experience of a leading online platform, work with a talented team, and contribute to the exciting digital landscape of Sandton . We foster a culture of innovation and user-centric design.

Key Responsibilities

• Develop, test, and deploy high-quality, responsive user interfaces using React and TypeScript.
• Collaborate with UI/UX designers to translate wireframes and mockups into functional web pages.
• Work closely with backend engineers to integrate frontend components with server-side logic via APIs.
• Optimize application components for maximum speed, scalability, and user experience.
• Write clean, maintainable, and well-documented code.
• Implement and manage state management solutions (e.g., Redux, Zustand).
• Ensure cross-browser compatibility and performance optimization.
• Participate in code reviews, providing constructive feedback to peers.
• Troubleshoot and debug frontend issues, identifying and implementing effective solutions.
• Stay up-to-date with the latest frontend technologies and best practices.
• Mentor junior frontend developers and contribute to team best practices.
• Contribute to architectural discussions and decisions for the frontend stack.

Requirements

• Bachelor's degree in Computer Science, Web Development, or a related field, or equivalent work experience.
• Minimum of 5 years of professional experience in frontend development.
• Expertise in JavaScript (ES6+) and TypeScript.
• Proven experience building complex applications with React.js.
• Strong understanding of state management libraries (e.g., Redux, Context API).
• Experience with modern frontend build pipelines and tools (e.g., Webpack, Babel).
• Proficiency in HTML5 and CSS3, including preprocessors (e.g., SASS, LESS).
• Experience consuming RESTful APIs.
• Familiarity with version control systems, such as Git.
• Understanding of web performance optimization techniques.
• Excellent problem-solving and debugging skills.
• Strong communication and collaboration abilities.
• Experience with unit and integration testing frameworks (e.g., Jest, React Testing Library).
• Familiarity with Next.js is a plus.

Benefits

• Competitive salary package reflecting senior-level expertise.
• Opportunity to work on a large-scale, high-impact e-commerce platform.
• Be part of an innovative and fast-paced team in Sandton, Gauteng .
• Professional development opportunities, including access to training and conferences.
• Modern office environment with great amenities.
• Comprehensive health insurance and retirement plan.
• Direct impact on user experience and platform growth.