Front-End Engineer (React.js)

About the Role

We are looking for a talented Frontend Engineer with 4–6 years of experience in building modern, responsive, and high-performance web applications. The ideal candidate should have strong expertise in React.js, Next.js, and modern JavaScript frameworks, along with a solid understanding of frontend architecture, performance optimization, and UI/UX best practices.

You will work closely with backend engineers, UI/UX designers, product managers, and QA teams to develop scalable enterprise applications that deliver exceptional user experiences. Experience integrating REST APIs, working with cloud-hosted applications, and building reusable component libraries is highly desirable.

Should able to handle large PDF documents (hundreds to thousands of pages), high-resolution images, and AI-generated annotations. The ideal candidate should have experience building applications involving document rendering, image manipulation, canvas-based interactions, and performance optimization for large datasets.

You will work closely with backend engineers, AI/ML engineers, product managers, and UX designers to build intuitive and responsive user experiences for enterprise-scale applications.

Key Responsibilities
Frontend Development

• Design, develop, and maintain responsive web applications using React.
  
• Build reusable, scalable, and maintainable UI components.
  
• Develop pixel-perfect user interfaces based on UI/UX designs and wireframes.
  
• Optimize application performance, accessibility, and responsiveness across browsers and devices.
  
• Write clean, modular, and well-documented code following industry best practices.
  
  

API Integration

• Integrate frontend applications with RESTful APIs and backend microservices.
  
• Collaborate with backend engineers to define API contracts and ensure seamless integration.
  
• Handle authentication, authorization, and secure communication with backend services.
  
• Implement efficient error handling and loading states.
  
  

Performance & Quality

• Optimize application performance using lazy loading, code splitting, caching, and rendering optimization.
  
• Improve Core Web Vitals and overall application responsiveness.
  
• Identify and resolve UI bugs and performance bottlenecks.
  
• Ensure cross-browser compatibility and mobile responsiveness.
  
• Write unit and integration tests for frontend components.
  
• Develop features for viewing and interacting with large PDF documents containing hundreds or thousands of pages.
  
• Optimize rendering performance for large documents using techniques such as lazy loading, virtual scrolling, page caching, and incremental rendering.
  
  

Collaboration

• Work closely with UI/UX designers to deliver intuitive and visually appealing interfaces.
  
• Collaborate with product managers to understand business requirements and translate them into technical solutions.
  
• Participate in sprint planning, code reviews, and technical discussions.
  
• Mentor junior developers and contribute to frontend best practices.
  

Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, or a related field.
  
• 4–6 years of professional experience in frontend application development.
  
• Strong expertise in React.js.
  
• Experience developing enterprise-grade, responsive web applications.
  
• Strong understanding of modern frontend architecture and component-based development.
  
• Experience working in Agile/Scrum development environments.
  
  

Required Technical Skills
Frontend Technologies

• React.js
  
• Next.js
  
• JavaScript (ES6+)
  
• TypeScript
  
• HTML5
  
• CSS3
  
• Tailwind CSS, Material UI, or Bootstrap
  
• Responsive Web Design
  
  

State Management

• Redux Toolkit
  
• Context API
  
• React Query or TanStack Query
  
• Zustand
  

Performance Optimization

• Code Splitting
  
• Lazy Loading
  
• Memorization
  
• Server-Side Rendering (SSR)
  
• Static Site Generation (SSG)
  
• Client-Side Rendering (CSR)
  
• Incremental Static Regeneration (ISR)
  
  

Testing

• Jest
  
• React Testing Library
  
• Cypress or Playwright (preferred)
  
  

Requirements

Preferred Qualifications

• Experience building SaaS or enterprise applications.
  
• Experience working with Next.js
  
• Familiarity with frontend security best practices, including XSS, CSRF prevention, and Content Security Policy (CSP).
  
• Experience integrating authentication providers such as Auth0, Keycloak,.
  
• Knowledge of GraphQL is a plus.
  
• Familiarity with design systems and reusable component libraries.
  
• Basic understanding of backend technologies (Node.js or Python) to facilitate collaboration with backend teams.
  
• Experience working with AI-powered applications or integrating LLM-based APIs is an advantage.
  

Nice-to-Have Skills

• Experience with AI-assisted user interfaces or AI-powered web applications.
  
• Familiarity with data visualization libraries such as Chart.js, D3.js, or Recharts.
  
• Experience with WebSockets or real-time applications.
  
• Experience using Figma and collaborating closely with UX designers.
  
• Experience working with document-centric or graphics-intensive applications is highly preferred.
  

This role is ideal for engineers who are passionate about building intuitive, performant, and scalable web applications using modern frontend technologies and who enjoy working in a collaborative, cloud-native engineering environment.