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Senior Full Stack Developer (React, Node.js, JS & CSS)

Instrumental Group · Golden, CO · 3 wk ago
RemoteRemoteInformation TechnologyFull-time

About the role

We are looking for a Senior Full Stack Developer to join our growing international digital agency. The ideal candidate is an ambitious and driven modern JavaScript developer with a strong foundation in front-end and back-end development. While we specialize in HubSpot CMS and CRM development, prior HubSpot experience is not required—we are willing to train the right person. This is a hands-on, fast-paced development role where you will build modern web applications, custom HubSpot solutions, and scalable backend systems. You will work closely with designers, strategists, and other developers to deliver high-quality digital experiences.

Responsibilities

  • Build and maintain applications using React and Node.js
  • Create HubSpot CRM UI Extensions and interactive front-end components
  • Create serverless functions and custom-coded workflow actions using Node.js
  • Develop and maintain HubSpot CMS themes, templates, and modules (training provided if needed)
  • Ensure high-quality, performant, and accessible web experiences
  • Collaborate with designers and strategists to translate requirements into technical solutions
  • Stay current with modern web technologies and best practices

Requirements

  • 5+ years of professional full-stack JavaScript development experience
  • Strong proficiency in React.js and state management (Redux, Zustand, Context API, etc.)
  • Solid experience with Node.js (Express, serverless functions, API development)
  • Strong understanding of modern CSS (SCSS, Tailwind, CSS-in-JS, Grid, Flex, etc.)
  • Experience working with APIs and data fetching (Axios or similar)
  • Strong Git workflow experience (branches, pull requests, code reviews)
  • Willingness to learn HubSpot CMS and CRM development

Skills

  • Strong proficiency in React.js and state management (Redux, Zustand, Context API, etc.)
  • Solid experience with Node.js (Express, serverless functions, API development)
  • Strong understanding of modern CSS (SCSS, Tailwind, CSS-in-JS, Grid, Flex, etc.)
  • Experience working with APIs and data fetching (Axios or similar)
  • Strong Git workflow experience (branches, pull requests, code reviews)
  • Willingness to learn HubSpot CMS and CRM development

Bonus Experience

  • Experience with HubSpot CMS and HubL
  • Experience building HubSpot CRM UI Extensions
  • Familiarity with GraphQL and REST APIs
  • Experience with other CMS platforms (WordPress, etc.)
  • Experience with backend languages (Python, PHP, Go, Elixir)
  • Experience with databases (PostgreSQL, MongoDB, Firebase, Supabase, MySQL, Convex)
  • Experience deploying apps to Vercel, Netlify, Render, or DigitalOcean
  • Spanish fluency (a plus, not required)

Pay

Comprehensive medical, dental, and vision insurance
Short-term and long-term disability coverage
Accident insurance for additional peace of mind
401(k) retirement plan
Quarterly incentive plan

Schedule

Remote or Hybrid (based on team needs)

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