User Interface Engineer

UI Engineer (Contract)Remote (Open to NY, West Coast, and Pittsburgh, PA)Rate: $60/hr (NY & West Coast) | $60/hr (Pittsburgh, PA) Rates may vary based on exact location/time zone compatibility.Experience Level: 6–10+ years (10+ years strongly preferred)About the RoleWe are seeking a highly experienced, senior-level UI Engineer for a dynamic contract engagement. In this role, you will split your time between critical, customer-facing e-commerce applications (powering major high-visibility initiatives like "same-day delivery" and "standard plus shipping") and highly functional internal portals used daily by our Product Managers and supply chain vendors.The ideal candidate is a seasoned frontend specialist with deep, expert-level expertise in Ember.js who thrives in collaborative, cross-functional environments and actively leverages modern AI development tools to accelerate delivery.Required Skills & Qualifications6–10+ years of professional frontend/UI engineering experience, with a proven track record as a senior or lead engineer.Expert-level mastery of Ember.js is non-negotiable, as it comprises the vast majority of the day-to-day architecture.Solid working knowledge or exposure to Node.js.Strong conceptual and working understanding of Java, Spring Boot, and Microservices architecture to ensure smooth frontend-to-backend integration.Partner with multiple internal teams to coordinate, implement, and track A/B testing configurations to optimize customer-facing applications.Hands-on experience embedding AI development tools (Cursor, GitHub Copilot, or similar) into your daily coding workflow.Preferred Qualifications ("Big Plus")Direct experience setting up and managing experiments via Optimizely.Prior experience in the E-commerce, Retail, or Supply Chain technology sectors.