Lead Fullstack Engineer

W2 ONLY - no C2C or sponsorship providedTitle: Lead Fullstack DeveloperLocation: 100% Remote - EST hoursDuration: 12 month contract + extensions or permanent conversionMUST HAVES:5+ years of experience in software engineeringFrontend: React / Backend java - 70% react 30% javaMentorship experience - Will be providing guidance on front end best practices, code reviews, etc. 80% hands on work vs 20% mentorshipCloud experience needed - GCP preferred, but not requiredAI experience required - Any tool - the team is using GeminiJob DescriptionAn Insight Global Fortune 500 Retail Client is looking for a talented lead fullstack engineer to join their US based team. This engineer will support the clients payment platform, a high-visibility application that drives billions in annual sales. Work will focus on improving platform stability, modernizing the application through a front-end rewrite to the new tech stack, and delivering enhancements that improve the customer checkout experience. The role is approximately 80% hands-on development and 20% technical leadership, including code reviews, mentoring engineers, and promoting frontend best practices. The consultant will collaborate closely with a team of engineers, QE, and product leadership while helping shape the future architecture of a mission-critical retail platform.