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