Senior Frontend Engineer

SQ1 Security; Tamil Nadu; On-site; INR 1,600,000 - 2,800,000; Full time

Job summary

SQ1 Security in Tamil Nadu is seeking a Senior Frontend/UI Developer to build modern, responsive web apps using React.js, Next.js, TypeScript, JavaScript, HTML5 and CSS3.

You will design and implement reusable UI components, translate UI/UX designs into production-ready code, and ensure performance, accessibility, and cross‑browser compatibility while collaborating with backend services.

The role also involves code reviews, mentoring junior developers, and contributing to architecture discussions.

Qualifications

• Strong experience building modern web apps with React.js and Next.js.
• Proficient in TypeScript and JavaScript (ES6+).
• Excellent knowledge of HTML5/CSS3 and modern UI frameworks.
• Experience with component-driven UI and testing using Jest/Vitest/RTL.

Responsibilities

• Design, develop, and maintain responsive web applications using React.js and Next.js.
• Build reusable, scalable, and maintainable UI components.
• Translate UI/UX designs into production-ready code.
• Develop applications using TypeScript, JavaScript (ES6+), HTML5, and CSS3.
• Integrate frontend applications with REST APIs and backend services.
• Optimize applications for speed, scalability, SEO, and performance.
• Ensure cross-browser compatibility and responsive design.
• Write clean, modular, and testable code following industry best practices.
• Participate in architecture discussions and technical design reviews.
• Conduct code reviews and mentor junior developers.
• Troubleshoot production issues and implement fixes.

Skills

React.js

Next.js

TypeScript

JavaScript (ES6+)

HTML5

CSS3 / SCSS / SASS/ Tailwind CSS

Jest / Vitest / React Testing Library

Tools

Node.js

Job description

We are looking for a talented Senior Frontend/UI Developer to build modern, responsive, and user-friendly web applications. The ideal candidate should have strong expertise in React.js, Next.js, TypeScript, JavaScript, HTML5, CSS3, and modern UI frameworks

Key Responsibilities

Design, develop, and maintain responsive web applications using React.js and Next.js.

Build reusable, scalable, and maintainable UI components.

Translate UI/UX designs into high-quality production-ready code.

Develop applications using TypeScript, JavaScript (ES6+), HTML5, and CSS3.

Integrate frontend applications with REST APIs and backend services.

Optimize applications for speed, scalability, SEO, and performance.

Ensure cross-browser compatibility and responsive design.

Write clean, modular, and testable code following industry best practices.

Participate in architecture discussions and technical design reviews.

Conduct code reviews and mentor junior developers.

Troubleshoot production issues and implement fixes.

Requirements

Required Skills

• React.js
• Next.js
• TypeScript
• JavaScript (ES6+)
• HTML5
• CSS3 / SCSS / SASS/ Tailwind CSS
• Jest / Vitest / React Testing Library

Good to Have

• Node.js
• Ant Design
• Cypress
• Micro Frontend Architecture
• React Query / TanStack Query