Senior JavaScript Developer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Javascript Developer - React based in India.

• Architect and develop robust, scalable web applications using React.js and Next.js, ensuring maintainability, reliability, and a strong user experience.
• Own significant frontend features throughout the complete lifecycle, from technical design and implementation to rollout and continuous improvement.
• Drive frontend performance optimization, including server-side rendering, static generation, bundle size, Core Web Vitals, caching, debugging, and browser performance.
• Collaborate with product, design, and other engineering teams to define and deliver features that improve user engagement.
• Design and integrate REST-based third-party APIs and ensure reliable communication between frontend applications and external services.
• Establish and maintain high engineering standards through code reviews, refactoring, testing practices, and pragmatic technical debt reduction.
• Lead initiatives to improve frontend architecture, development workflows, deployment pipelines, and overall application quality.
• Mentor junior and mid-level developers, share knowledge, and help strengthen the team’s frontend engineering capabilities.
• Evaluate emerging web technologies, frameworks, and development practices and recommend improvements where they can create meaningful value.

• 5+ years of professional experience building production web applications with JavaScript.
• 5+ years of professional experience with React.js, including strong knowledge of functional components, hooks, state management, context, memoization, rendering behavior, and lifecycle concepts.
• Hands-on production experience with Next.js, including server-side rendering, static generation, and routing.
• Strong command of ES6+, TypeScript, HTML, CSS, and a state management library such as Redux or a comparable solution.
• Proven experience designing and integrating REST-based third-party APIs.
• Demonstrated experience with frontend performance optimization, debugging, browser testing, and modern web performance practices.
• Experience with modern build tooling such as Webpack, Babel, or equivalent technologies, as well as frontend deployment pipelines.
• Track record of leading code reviews, refactoring legacy code, and improving engineering standards.
• Strong problem-solving skills, with the ability to independently analyze, clarify, scope, and translate requirements into effective technical solutions.
• Strong attention to detail and a well-developed understanding of UI/UX and visual interfaces.
• Familiarity with Google Lighthouse and PageSpeed Insights and their use in driving measurable performance improvements is preferred.
• Knowledge of SEO best practices for server-rendered applications, component libraries, design systems, and monorepo tooling is advantageous.
• Experience with automated testing tools such as Jest, React Testing Library, Playwright, or Cypress is a plus.
• Familiarity with feature flagging, progressive rollouts, and asynchronous or distributed team environments is desirable.
• Prior experience mentoring developers or leading technical initiatives is preferred.
• Clear, confident communication skills, with the ability to both challenge ideas constructively and respond positively to feedback.
• A curious, proactive, collaborative mindset and a genuine interest in building practical products that solve real problems.

• Competitive salary based on skills and experience.
• Fully remote work, enabling collaboration with a globally distributed team.
• Flexible working hours and autonomy over your schedule.
• Five-day work week designed to support a healthy work-life balance.
• Team retreats and offsites for collaboration, connection, and recharging.
• Meal vouchers and employee benefits, including health insurance.
• Internal learning tracks and opportunities to expand your development expertise.
• Company merchandise and additional employee perks.