Full Stack Engineer (React / Python / Website & SEO)

Your mission

Role Overview

As a Full Stack Engineer at Index, you will work across the frontend, backend, and platform layers. You will build and maintain React-based applications, contribute to backend services (Python and Ruby on Rails), and ensure our websites are technically optimized for performance, SEO, analytics, and tracking.

This role requires strong technical ownership, attention to detail, and the ability to collaborate across product and marketing teams.

Key Responsibilities

Frontend Development (React / Next.js)

• Build and maintain React and Next.js components, pages, and application logic.
  
  

• Troubleshoot and fix bugs in the existing codebase.
  
  

• Identify and resolve UI performance issues (code splitting, memoization, lazy loading).
  
  

• Monitor and optimize Core Web Vitals.
  
  

• Ensure reliable integration between frontend and backend services.
  
  

SEO, Analytics & Tracking

• Implement and manage Google Tag Manager (GTM) containers, tags, triggers, and variables.
  
  

• Set up and maintain conversion tracking, event tracking, and analytics integrations (GA4, Meta Pixel, etc.).
  
  

• Collaborate with marketing on tracking requirements and data layer implementation.
  
  

• Debug, QA, and validate tracking implementations across the website.
  
  

• Implement technical SEO best practices, including:
  
  

  • Schema markup
    
    

  • Meta tags
    
    

  • Sitemap management
    
    

  • Core Web Vitals optimization
    
    

Accessibility

• Apply SEO and accessibility best practices for public-facing pages.
  
  

• Ensure compliance with WCAG accessibility standards.
  
  

Backend & Platform Development

• Contribute to backend and platform development using Python and Ruby on Rails.
  
  

• Collaborate on API design, data models, and system integrations.
  
  

• Work with PostgreSQL, Redis, and Docker-based environments.
  
  

Code Quality & Collaboration

• Write clean, well-structured, and well-documented code.
  
  

• Participate in code reviews and ensure appropriate test coverage.
  
  

• Contribute to build, testing, and deployment pipelines (CI/CD).
  
  

• Ensure stable deployments across environments.
  
  

Tech Stack

• Frontend: Next.js, React.js, TypeScript, Tailwind CSS, Shadcn, Radix UI, Framer Motion
  
  

• Backend & Platform: Python, Ruby on Rails, Ruby
  
  

• Databases & Infrastructure: PostgreSQL, Redis, Docker
  
  

• Testing: Jest
  
  

• Tooling: Git, Webpack
  
  

• Project Management: Agile methodology, Atlassian Jira, Bitbucket
  
  

• Communication: Slack, Google Meet
  
  

Your profile

Required

• Strong knowledge of HTML5, CSS3, JavaScript (ES6/7), and TypeScript.
  
  

• Solid experience with React.js and modern frontend development.
  
  

• Experience with SASS, Bootstrap, and Tailwind CSS.
  
  

• Experience with unit testing using Jest.
  
  

• Good understanding of Git and modern build tools (e.g., Webpack).
  
  

• Ability to work independently with strong self-organization skills.
  
  

• Analytical thinking and problem-solving mindset.
  
  

Beneficial / Nice to Have

• Knowledge of Feature-Sliced Design (FSD) architecture.
  
  

• Experience with Framer Motion or other animation libraries.
  
  

• Experience with Formik and Yup.
  
  

• Familiarity with Rollup.
  
  

• Hands-on experience with Python and/or Ruby on Rails platforms.
  
  

Why us?

What We Offer

• A role with real ownership across frontend, backend, and platform concerns.
  
  

• Close collaboration with product, design, and marketing teams.
  
  

• The opportunity to influence performance, SEO, and analytics at a technical level.
  
  

• A modern tech stack and agile working environment.
  
  

• A culture that values quality, autonomy, and continuous improvement.