Senior Javascript Developer - React

As a Senior Frontend Developer (React.js / Next.js), you will: • Architect and build robust, scalable web applications using React.js and Next.js that make our platform easy and enjoyable to use. • Own significant features end to end — from technical design through rollout — and set the standards others build against. • Drive frontend performance: server-side rendering, static generation, bundle size, Core Web Vitals, and caching strategy. • Collaborate with cross-functional teams to design and implement new features that enhance user engagement. • Raise the quality bar through code reviews, refactoring, testing practices, and pragmatic technical debt reduction. • Mentor mid-level and junior engineers, and help grow the team’s overall frontend capability. • Stay ahead of emerging technologies and best practices in web development to keep our applications cutting-edge. Requirements Primary Requirements • 5+ years of professional experience building production web applications with JavaScript. • 5+ years of professional experience with React.js. • Hands-on production experience with Next.js, including server-side rendering, static generation, and routing. • Deep understanding of React concepts: functional components, hooks, state management, context, memoization, rendering behavior, and lifecycle. • Strong command of ES6+, TypeScript, HTML, CSS, and a state management library (Redux or similar). • Proven experience designing and integrating REST-based third-party APIs. • Demonstrated ownership of frontend performance optimization, debugging, and browser testing. • Experience with modern build tooling (Webpack, Babel, or equivalent) and frontend deployment pipelines. • Track record of leading code reviews, refactoring legacy code, and improving engineering standards. • Strong problem-solving skills with the ability to analyze, clarify, and scope requirements independently. • High attention to detail and strong visualization of UI/UX. Preferred Requirements • Experience using Google Lighthouse and PageSpeed Insights to drive measurable frontend performance gains. • Knowledge of SEO best practices for server-rendered web applications. • Experience with component libraries, design systems, and monorepo tooling. • Familiarity with automated testing (Jest, React Testing Library, Playwright/Cypress). • Experience with feature flagging and progressive rollout practices. • Experience working with asynchronous or distributed teams. • Prior experience mentoring developers and leading technical initiatives. Soft Skills & Mindset • Clear communication and the confidence to challenge and be challenged. • Curious, proactive, and generous with knowledge. • Ability to work in a fast-paced, collaborative product environment. • Strong desire to build real products that solve real problems. Benefits At Stadium, your input matters, and we believe in creating a culture where innovation is encouraged. Join us in crafting the future of group gifting and recognition. Your adventure starts here! • Competitive salary based on skill set. • Fully remote role - work with talented teammates across the globe. • Flexible working hours and autonomy over your schedule. • 5-day work week for better work-life balance. • Team retreats and offsites to connect and recharge. • Meal vouchers and employee benefits (health insurance) support. • Internal learning tracks to grow into other areas of development. • Plenty of company swag and additional perks.