Senior Frontend Developer

Company Name: Klizo Solutions Pvt. Ltd.

Company Website: www.klizos.com

Position Title: Sr. Frontend Developer

No. of Vacancies: 1.

Employment Type: Full-Time

Location: Kolkata, Astra Tower, Newtown, Akanksha More (Near City Centre 2).

Job Type: IN OFFICE

Experience Required: 3-4 Years (on Front End Technologies)

Shift Time: Flexible

We are actively seeking a highly skilled and dedicated Sr. Front-end Developer with 3-4 years of hands-on experience specifically building complex applications with React.js. The ideal candidate will be a true expert in the React ecosystem, responsible for designing, developing, and optimizing highly interactive and performant user interfaces. You will be a key player in our innovative team, working closely with product designers and back-end engineers to deliver cutting-edge web experiences.

Key Responsibilities:

• Lead the development of sophisticated user-facing features and modular components primarily using React.js, Next.js, and TypeScript.
• Design and implement robust, scalable, and reusable React component architectures and state management solutions (e.g., Context API, Redux, Zustand).
• Translate complex UI/UX designs and wireframes into pixel-perfect, highly responsive, and performant React applications.
• Optimize React application performance, bundle size, and rendering efficiency for maximum speed and user experience.
• Deeply integrate front-end React components with RESTful APIs, handling data fetching, caching, and error management effectively.
• Conduct comprehensive unit, integration, and end-to-end testing of React components and applications using relevant frameworks.
• Stay at the forefront of the React.js ecosystem, modern JavaScript/TypeScript features, and emerging front-end architectural patterns.
• Maintain clear, concise, and thorough documentation for React components, libraries, and development processes.
• Proactively identify, debug, and resolve complex issues within the React codebase in a timely and efficient manner.
• Actively participate in Agile/Scrum ceremonies, contributing to sprint planning, daily stand-ups, code reviews, and retrospectives.

Must-Have Skills and Qualifications:

• 3-4 years of professional experience as a Front-end Developer, with a demonstrated focus and strong portfolio showcasing significant projects built with React.js.
• Expert-level proficiency in React.js (Hooks, Context API, component lifecycle, performance optimization) and Next.js (SSR, SSG, routing, API routes).
• Strong command of modern JavaScript (ES6+) and TypeScript for building type-safe and maintainable React applications.
• Extensive experience with state management libraries such as Redux (Redux Toolkit), Zustand, or advanced use of React Context API.
• Proficient in consuming and integrating with RESTful APIs within a React application, including asynchronous operations and error handling.
• Solid understanding of responsive design principles and best practices for building adaptive UIs across various devices.
• Expertise with version control systems, particularly Git, including advanced branching, merging, and pull request workflows.
• Familiarity with web performance optimization techniques specific to single-page applications and React, including code splitting and lazy loading.
• Understanding of UI/UX design principles and a proven ability to collaborate effectively with design teams to implement their vision precisely.
• Exceptional problem-solving, analytical, and debugging skills, with a keen eye for detail.
• Excellent communication, collaboration, and interpersonal skills.
• Demonstrated ability to work independently, manage multiple priorities, and deliver high-quality work in a dynamic environment.

Preferred Skills:

• Experience with front-end build tools and bundlers (e.g., Webpack, Vite) specifically configured for React applications.
• Familiarity with front-end testing frameworks for React components (e.g., Jest, React Testing Library, Cypress).
• Experience with continuous integration/continuous deployment (CI/CD) pipelines for React applications.
• Knowledge of server-side rendering (SSR) and static site generation (SSG) in depth with Next.js.
• Familiarity with modern CSS-in-JS solutions (e.g., Styled Components, Emotion) or utility-first CSS frameworks like Tailwind CSS.
• Experience with React Router or similar routing libraries.