Senior Frontend Engineer (React / Next.js)

We are looking for a Senior Frontend Engineer to join Quintagroup and work on a long-term US-based product in the marketplace analytics domain. The platform helps analyze marketplace data, track sales trends, and support data-driven product decisions. In this role, you will focus on building and improving the frontend part of a modern web application in close collaboration with a senior US-based engineer and a cross-functional team.

Responsibilities Develop and enhance a modern frontend application using React, Next.js, and TypeScript Build responsive, scalable, and user-friendly interfaces Work closely with a senior engineer on architecture and implementation decisions

Collaborate with BA, Data Engineers, DevOps, PM, and Architect Integrate frontend components with APIs and analytics-related functionality Participate in planning, estimation, and technical discussions Improve application performance, maintainability, and code quality Contribute to engineering best practices and UI consistency

Tech Stack React, Next.js, TypeScript, REST APIs, AWS

Requirements

6+ years of commercial experience in frontend development Strong hands-on experience with React and TypeScript Strong commercial experience with Next.js Deep understanding of modern frontend architecture and best practices Experience building complex, data-heavy web applications Solid experience with REST APIs integration Strong knowledge of performance optimization, state management, and reusable component design Experience working in distributed teams Strong English communication skills, B2+ or higher

Nice to Have

Experience with Node.js Experience with AWS Familiarity with analytics or marketplace-related products Experience collaborating in cross-functional product teams

We Offer Flexible working format: fully remote, hybrid, or office-based in Lviv Supportive and friendly team environment Long-term stable collaboration with an established US client Online English classes Private healthcare package Access to learning and professional development opportunities Team-building activities and company perks IT Club Loyalty membership