Definity First

Senior Frontend Developer

Definity First

contract

Posted on:

Location Type: Remote

Location: Remote • 🇲🇽 Mexico

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Job Level

Senior

Tech Stack

JavaScriptNext.jsReactTypeScript

About the role

  • 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.

Requirements

  • 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, 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.
  • Nice to have: 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.
Benefits
  • Health insurance
  • Remote work options

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
Next.jsJavaScriptTypeScriptReactVerceltechnical SEOCore Web VitalsGitCI/CDAPI integration
Soft skills
independent worktechnical decision-makingcollaborationcontinuous improvementsecure handling of credentials