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Definity · 19 hours ago

Senior Frontend Developer

United States

Full-time, Contract

Remote

Senior Level

Definity is a nearshore technology partner specializing in custom digital solutions and AI innovation. They are seeking a Senior Frontend Developer to design and build a high-performance website, own the frontend architecture, and collaborate with various teams to ensure seamless integrations and data flows.

ConsultingDigital MarketingSEO

Growth Opportunities

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

Qualification

JavascriptTypescriptReactVercelTechnical SEOGitCI/CDAccessibilityAdvanced English

Required

Experience building modern web applications and production websites with Javascript, Typescript, Astro

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)