[Remote] Senior Frontend Developer (Next.js)

Note: The job is a remote job and is open to candidates in USA. Definity is a technology company founded in 2004, partnering with organizations like Tesla and Harvard. They are seeking a Senior Frontend Developer (Next.js) to take end-to-end ownership of a high-performance modern website, focusing on performance, reliability, and maintainability while collaborating with various teams. Responsibilities • Design and build a high-performance website using Next.js • Own the frontend architecture and deployment lifecycle on Vercel • Implement best practices for performance, accessibility, and discoverability • Integrate external systems such as billing, CRM, and content platforms • Work independently, making technical decisions with minimal oversight • Collaborate with product, marketing, and operations when integrations or data flows are involved • Continuously improve build, deploy, and development workflows • Ensure secure handling of credentials, webhooks, and environment variables • Monitor performance and reliability, improving Core Web Vitals and overall site health Skills • Experience building modern web applications and production websites with Next.js (App Router and/or Pages Router) • Strong proficiency with React and modern JavaScript/TypeScript • Experience owning the deployment lifecycle on Vercel (deployments, previews, environment management) • Solid understanding of modern technical SEO fundamentals (not keyword strategy), including: SSR and SSG, metadata management, Core Web Vitals, sitemap generation and robots configuration, page speed optimization and performance monitoring • Accessibility basics (semantic HTML, performance-friendly components) • Comfort integrating with third-party systems and APIs • Secure handling of API keys, webhooks, and environment variables • Familiarity with Git and modern version control workflows • CI/CD concepts • Advanced English • Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience) • Experience using AI-assisted development tools to accelerate delivery • Familiarity with headless CMS patterns and content pipelines • Experience with edge functions or serverless APIs • Prior work on marketing or product-led websites with real traffic and conversions Company Overview • Definity is a nearshore technology partner specializing in custom digital solutions, AI innovation, and business applications. It was founded in 2004, and is headquartered in San Diego, California, USA, with a workforce of 51-200 employees. Its website is Apply tot his job