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

Permanent employee, Part-time · Remote

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.

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About us

Index is a UK-based company providing end-to-end remote-work services, powered by our digital platform. We help leading companies like GoEuro, Vodafone, Venly, YC startups, and 100 more companies to scale their engineering team by finding and managing high-performing tech talent.

The company was founded 2019 and headquartered in London. We unite top engineering talent from around the world and connect them with innovative companies seeking high-performing teams.

It was co-founded by an Oxford alumnus and tech executive with a track record of building successful global teams and scaling output rapidly.

Why Join Index.dev

We are officially recognized by the Financial Times as one of Europe’s fastest-growing companies: in 2024 we ranked 29th overall and 6th in IT & Software among the FT 1000.

We scale faster than market average — enabling us to offer frequent, meaningful opportunities for those who perform.

From Talent Marketplace to Full-Service Software Powerhouse

In October 2025 we completed the acquisition of Codemotion — a seasoned, U.S.-based custom software development company with a 60+ strong engineering team, decades of enterprise-project experience, and clients such as NASA, Neom, and MongoDB.

This strategic move transforms us from a talent-matching platform into a full-fledged software delivery partner: end-to-end solutions, from MVP to production, including CTO-level leadership, project management, design, QA, and scalable engineering teams.

As a result — along with helping hire developers, we’re delivering entire products and complex systems. We now serve clients in 180+ countries, offering broad timezone overlap, flexible staffing models, and a diversity of technical skills and cultural backgrounds.

Our growth trajectory ensures that high-performers don’t just onboard — they accelerate. With access to enterprise-level clients, cross-functional teams, and varied domains (FinTech, Blockchain, Healthcare, AI), talent can grow in ways rarely possible in traditional setups.

Our Vision & Mission: Where We’re Going Next

We are growing fast and have the vision of building the leading software development company in the world.
We believe that remote-first, globally distributed engineering teams are the future.

Our goals include:

1. Expand into a full end-to-end software delivery partner — delivering complete engineering solutions, from CTO-level leadership to full product development.
2. Attract and serve enterprise-level clients — by strengthening delivery quality, project reliability, and compliance to handle complex, high-stakes projects.
3. Deliver speed, quality, and flexibility at scale — ensuring clients get vetted, ready-to-interview talent and high-performing teams with exceptional turnaround time.
4. Sustain rapid, high-quality growth — continuing our momentum as one of Europe’s fastest-growing tech companies while preserving performance, culture, and delivery excellence.

Giving back is part of our DNA. We donate around 10% of the revenue to support vulnerable groups — including children, women, refugees — and invests in education programs for young students and future IT professionals.

If you’re motivated by scale, impact, complex projects, and global collaboration, Index.dev is the kind of place where your efforts will be amplified.
Here are some reviews from our teammates on -> Glassdoor.

You would make an ideal candidate for our company if you are willing to commit to the following:
Above Average Principles:
Integrity.
Respect. Show empathy and respect to others and their feelings; Show others that you care.
Extra-Mile. Excellence and work ethics. Ask the question: “What else can I do?”; Reject average, good to pass by.
Move Quickly and Be Resourcefulness. Do more with less.
Ongoing Learner. Ask the questions: “What coaching do you have for me?” and “What can I do better?“; What is the learning here?.
Team Player. Talent wins games, but teamwork and intelligence win championships.
Extra Smile. We look to the positive side in every situation. We love what we do every day. Ask the question: “What is good in this?”.

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We are looking forward to hearing from you!

Thank you for your interest in Index. Please fill out the following short form. Should you have difficulties with the upload of your data, please send an email to join@index.dev.