> Markdown version of [/jobs/ext/3097517-job-title-senior-frontend-software-engineer-e-online-web](https://www.wearedevelopers.com/jobs/ext/3097517-job-title-senior-frontend-software-engineer-e-online-web). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Job Title - Senior Frontend Software Engineer - E! Online Web - **Company:** Jean Martin, Inc - **Location:** Fort Lee, NJ, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Adobe Analytics, HTML, JavaScript (Programming Language), Application Programming Interfaces (APIs), Cascading Style Sheets (CSS), Data Systems, Metadata, Web Content Accessibility Guidelines, Web Usability, ReactJS, Git, Data Layers, Live Streaming, Graphql, Front End Software Development, React Testing Library - **Published:** September 26, 2026 - **Apply:** https://www.dice.com/job-detail/b40b1405-3808-4e21-a1db-9f06d0787e8e ## About the Role * Strong professional experience developing production React applications. * Advanced JavaScript, HTML, and CSS skills. * Experience working with hooks, context, component lifecycles, and error boundaries. * Experience with server-rendered React applications or similar SSR frameworks. * Strong understanding of hydration and server/browser rendering differences. * Experience with GraphQL and client-side caching. * Demonstrated ability to write behavior-focused tests with React Testing Library. * Experience diagnosing difficult production issues involving state, asynchronous behavior, APIs, or third-party integrations. * Ability to modernize legacy code incrementally while controlling regression risk. * Strong Git and pull-request review practices. * Ability to communicate technical risks and tradeoffs clearly. * Ability to work independently while collaborating effectively across teams. Preferred qualifications * Experience migrating a large application between major React versions. * Experience with media, publishing, entertainment, or other content-heavy platforms. * Familiarity with video players, live streaming, playlists, and advertising integrations. * Experience with Apollo cache normalization and SSR cache hydration. * Knowledge of technical SEO and structured metadata. * Familiarity with OneTrust or other consent-management platforms. * Experience with Adobe analytics, data layers, or comparable analytics systems. * Experience supporting internationalized websites. * Familiarity with accessibility standards such as WCAG. * Experience with high-traffic, revenue-generating consumer applications. ## Description * Develop and maintain customer-facing features across E! Online. * Help execute the React 16 * React 18.3 * React 19 modernization roadmap. * Upgrade React-facing dependencies, including Apollo Client, Helmet, intersection observers, and UI libraries. * Maintain server-side rendering and browser hydration behavior. * Diagnose and resolve hydration mismatches, rendering failures, race conditions, and browser-specific issues. * Build regression coverage for critical routes and user journeys. * Maintain GraphQL queries and Apollo Client cache behavior. * Develop and support article, gallery, video, livestream, navigation, poll, newsletter, and CMS-driven experiences. * Integrate and troubleshoot advertising, consent, analytics, and third-party services. * Protect SEO requirements, including metadata, canonical URLs, social tags, structured data, and server-rendered content. * Improve accessibility, performance, resilience, and Core Web Vitals. * Write clear unit, integration, hydration, and browser tests. * Review pull requests and identify functional, regression, security, and maintainability risks. * Participate in production support, root-cause analysis, and incident follow-up. * Create technical documentation and communicate implementation decisions to engineers and stakeholders. * Work closely with product, design, QA, CMS, platform, advertising, analytics, and release-engineering teams. ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [WeAreDevelopers LIVE – Frontend Inspirations, Web Standards and more](https://www.wearedevelopers.com/videos/1761-wearedevelopers-live-frontend-inspirations-web-standards-and-more) - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [WeAreDevelopers LIVE - Streaming HTML](https://www.wearedevelopers.com/videos/2135-wearedevelopers-live-streaming-html) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) ## Related Articles - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)