Senior Fullstack JavaScript Engineer (React / Next.js / Node.js)

We are looking for a Senior Fullstack JavaScript 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 contribute to building and improving a modern fullstack application together with a senior US-based engineer in a highly collaborative environment.

Responsibilities

Develop and enhance a fullstack application using React, Next.js, and Node.js Work closely with a senior engineer on product architecture and implementation Collaborate with BA, Data Engineers, DevOps, PM, and Architect Participate in planning, technical discussions, and delivery processes Integrate application logic with data pipelines and analytics-related components Ensure high performance, scalability, and reliability of the solution Contribute to technical decisions and engineering best practices

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

Requirements

5+ years of commercial experience with React and TypeScript Strong hands-on experience with Next.js 1+ years of commercial experience with Node.js Solid understanding of fullstack application architecture Experience working with REST APIs Experience with cloud environments; AWS would be a strong plus Understanding of data-heavy or analytics-oriented systems will be an advantage Experience working in distributed teams Strong English communication skills, B2+ or higher

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