Senior Javascript Developer (React.js)

About this role

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.