JavaScript Developer (React.js, next.js) - location - Remote- Chicago, IL Contract - 12 months Here is the job description As a senior frontend developer, you'll be in charge of developing the frontend of a product loved and used by thousands of developers every day. You'll build a beautiful and performant web application based on React.js and Next.js using multiple open-source packages, and including package insights and comparison, powerful search and discovery, documentation, knowledge, and community. As our lead next.js engineer, you'll choose and implement a best-of-breed frontend stack from scratch. What you will be doing:

• Build a best-of-breed frontend stack from scratch, including grid, typography, UI components, graphing, data display, and search components
• Build the frontend for our web application based on React and Next.js, creating a beautiful and pleasurable experience for hundreds of thousands of developers
• Create beautiful package pages that include information, documentation, and insights about package popularity, maintenance, issues, and quality
• Work with tonnes of data, and create reusable components to display the data in various ways, including graphs, charts, visualizations, and comparisons
• Do quick iterations and experiments as part of the core product team (product manager, designer, and backend developer) to test out new ideas and features
• Build a browser extension for developers, augmenting GitHub, npm and other websites with deep package insights
• Help us understand what's going on with our users, by using analytics tools, user journey tracking, feedback tools, error and performance logging You most likely have:
• At least 5 years of experience as a frontend JavaScript developer At least 3 years of experience building sophisticated apps experience with Next.js nice to have
• An aesthetic eye for user-interface detail, and experience working with UX/UI designers
• Hands-on experience of the latest capabilities in JavaScript (ES6/7/8/9) and CSS (grids, animations, transitions, media queries, styled-components)
• Experience setting up webpack and babel, plugins, minification, asset versioning, and CDN upload
• Ability to debug and optimize web apps' performance, including network, JavaScript, and rendering
• Experience with analytics tools such as Google Analytics and Google Webmaster Tools
• Experience with on-site SEO: metadata, header elements, robots file, sitemaps, etc