Principal Engineer - Frontend

This role is for one of the Weekday's clients

Min Experience: 8 years

Location: Mumbai

JobType: full-time

We are looking for a seasoned and innovative Principal Frontend Engineer to lead the development of next-generation web applications. This role is ideal for someone with deep technical expertise in JavaScript, React.js, D3.js, and a passion for building highly responsive and visually compelling user interfaces. As a technical leader, you will be responsible for setting frontend architecture standards, mentoring engineers, and driving best practices across teams.

Requirements

Key Responsibilities:

• Lead the design, architecture, and implementation of robust, scalable, and maintainable frontend solutions using modern JavaScript frameworks and tools.
• Develop rich, dynamic user interfaces leveraging React.js , D3.js , and other cutting-edge technologies.
• Translate complex business and data visualization requirements into efficient, intuitive UI components.
• Collaborate closely with product managers, UX designers, and backend engineers to define and refine technical requirements.
• Champion and implement frontend performance optimization techniques to ensure fast load times and smooth interactions.
• Enforce coding standards, conduct design and code reviews, and provide technical mentorship to junior and mid-level frontend engineers.
• Contribute to improving our UI architecture and development practices by evaluating and integrating new tools, libraries, and workflows.
• Advocate for a modular, testable, and extensible codebase that allows rapid development and deployment.
• Stay updated on emerging frontend technologies and frameworks, recommending and adopting them where applicable.

Required Skills & Qualifications:

• 810 years of hands-on experience in frontend web development.
• Expert proficiency in JavaScript (ES6+), HTML5, and CSS3 , with strong fundamentals in DOM manipulation, asynchronous programming, and browser rendering behavior.
• Advanced experience with React.js , including hooks, context, state management, and performance tuning.
• Proven experience in building and deploying data-rich visualizations using D3.js or similar libraries.
• Strong understanding of MVC frameworks and design patterns in frontend development.
• Experience working with RESTful APIs, JSON data, and responsive design principles.
• Ability to troubleshoot cross-browser and cross-device compatibility issues.
• Experience with modern frontend tooling (Webpack, Babel, ESLint, Prettier, etc.).
• Passion for clean, maintainable, and well-documented code.
• Excellent problem-solving, analytical thinking, and communication skills.
• Bachelor's/Master's degree in Computer Science, Engineering, or a related field.

Good to Have:

• Exposure to TypeScript and component-driven development (e.g., Storybook).
• Experience with unit testing frameworks like Jest, React Testing Library, or Enzyme.
• Familiarity with server-side rendering and Next.js is a plus.
• Contributions to open-source projects or active involvement in developer communities.