Senior JavaScript Engineer (React.js)

About the Position

Senior JavaScript Engineer (React.js)

Make retail great again through the power of technology! Intellias helps retailers provide consistent and customer-centric shopping experiences across all channels with disruptive retail tech solutions. Get on board and make your own contribution to the industry!

What project we have for you

With great experience come great projects. Just imagine: you can develop a product that should completely change the business of one of the world’s largest companies!

Our client is an innovative global company from the Fortune 500. Consumer Goods Producer and Retailer with headquarters in Switzerland that sells its products in 130 countries. Intellias mission is to support its strategy and efforts in the Digital and eCommerce space.

A newly conceptualized Digital Eco System is comprised of a set of capabilities including an online shop & website, linking online & offline, customization & personalization, engagement & membership, digital products & services.

What you will do

• Creating technical vision & documentation
• Participate in architecture and design efforts
• Code review, code optimization
• Technical tasks implementation, design, refactoring
• Collaborate with other engineering teams to resolve dependencies and deliver high-quality software on time

Requirements

• Senior-level experience delivering production web applications, with 7+ years in frontend development.
• Strong experience with React, TypeScript, and modern Next.js, including App Router patterns and server/client rendering.
• Ability to design maintainable components and shared packages/APIs within a large monorepo.
• Experience integrating frontend applications with GraphQL and REST APIs, including generated types, loading and error states, and evolving backend contracts.
• Proficiency in responsive and accessible UI development using CSS Modules/SCSS, with the ability to work within an existing design system and follow design token conventions.
• Experience with frontend state management, such as Redux and React Context.
• Solid understanding of testing and quality practices, including Jest or Vitest, Testing Library, Storybook, and browser testing frameworks.
• Familiarity with monorepo tooling and CI quality gates, including linting, PR workflows, type checks, and builds.
• Strong debugging, code review, and written communication skills.
• Ability to take ownership of features through implementation, testing, release, and production follow-up.
• Experience using modern AI development tools to improve productivity, such as GitHub Copilot, Codex, or Claude Code.

What it’s like to work at Intellias

At Intellias, where technology takes center stage, people always come before processes. By creating a comfortable atmosphere in our team, we empower individuals to unlock their true potential and achieve extraordinary results. That’s why we offer a range of benefits that support your well-being and charge your professional growth.

We are committed to fostering equity, diversity, and inclusion as an equal opportunity employer. All applicants will be considered for employment without discrimination based on race, color, religion, age, gender, nationality, disability, sexual orientation, gender identity or expression, veteran status, or any other characteristic protected by applicable law.

We welcome and celebrate the uniqueness of every individual. Join Intellias for a career where your perspectives and contributions are vital to our shared success.

Skills

• React
• TypeScript
• Next.js
• GraphQL
• REST APIs
• CSS Modules/SCSS
• Redux
• React Context
• Jest
• Vitest
• Testing Library
• Storybook
• CI quality gates
• linting
• PR workflows
• type checks
• builds
• debugging
• code review
• written communication

Locations

• Bulgaria, Sofia (Remote)
• Croatia, Zagreb (Remote)
• Poland, Warsaw (Remote)

We Offer

• Opportunity to work on innovative projects
• Collaborative and inclusive work environment
• Professional growth opportunities
• Remote work flexibility

About the Company

Intellias is a leading technology company that helps retailers provide consistent and customer-centric shopping experiences across all channels with disruptive retail tech solutions. We are committed to fostering equity, diversity, and inclusion as an equal opportunity employer.