Senior Frontend Engineer (React / JavaScript)
Summary
Build and optimize AI-driven web apps using React, TypeScript, and modern frontend tooling in a fast-paced product team.
emagine is supporting one of our international tech clients in finding a highly skilled Senior Frontend Engineer for a product-focused development initiative within AI-driven digital services.
The client operates in a modern, high-velocity environment where user experience, performance, and scalable frontend architecture are critical to the business.
Start: Preferably ASAP (within 1 month)
Duration: 6 months, with potential of extension
Location: Stockholm, ONSITE
Assignment Overview
You will join a product engineering team focused on building and evolving advanced web applications with a strong emphasis on frontend development, usability, and performance.
The assignment involves developing sophisticated UI functionality for AI-enabled workflows and collaborating closely with product, design, and backend engineering teams to deliver scalable and production-ready solutions.
This is a hands-on engineering role for someone who enjoys solving complex frontend challenges in a fast-moving product organization.
Responsibilities
Build and maintain high-quality frontend applications using modern JavaScript frameworks
Develop scalable and reusable UI components and frontend architecture
Drive performance optimization, responsiveness, and frontend reliability
Collaborate closely with product managers, designers, and backend engineers
Participate in architectural discussions and technical decision-making
Improve developer experience, maintainability, and testing practices
Contribute to experimentation and rapid product iteration in an AI-driven environment
Work with modern APIs, real-time interactions, and data-intensive interfaces
Your profile:
Strong frontend engineering background with several years of hands-on experience
Deep expertise in JavaScript and modern React development
Experience building production-grade frontend applications with high quality standards
Strong understanding of frontend architecture, state management, and performance optimization
Experience working in product-oriented and fast-paced engineering environments
Ability to work independently and drive technical initiatives forward
Strong communication skills in English
Tech Stack needed
Experience with TanStack ecosystem (TanStack Query, Router, Table, etc.)
Experience with TypeScript
Familiarity with cloud-native or distributed environments
Experience working with AI-driven products or developer tools
Understanding of modern experimentation and product analytics workflows
Experience collaborating in highly cross-functional product organizations